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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">mrisel</journal-id><journal-title-group><journal-title xml:lang="en">Magnetic Resonance in Solids</journal-title><trans-title-group xml:lang="ru"><trans-title>Magnetic Resonance in Solids</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2072-5981</issn><publisher><publisher-name>Kazan Federal University</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">mrisel-148</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Статьи</subject></subj-group></article-categories><title-group><article-title>Probing the Metal-to-Insulator Transition in LaCu3RuxTi4-xO12 by Gd-ESR</article-title><trans-title-group xml:lang="ru"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Schmidt</surname><given-names>B.</given-names></name></name-alternatives><bio xml:lang="en"><p>D-86159 Augsburg</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Krug von Nidda</surname><given-names>H. -A.</given-names></name></name-alternatives><bio xml:lang="en"><p>D-86159 Augsburg</p></bio><email xlink:type="simple">kvn@physik.uni-augsburg.de</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Riegg</surname><given-names>S.</given-names></name></name-alternatives><bio xml:lang="en"><p>D-86159 Augsburg</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Ebbinghaus</surname><given-names>S. G.</given-names></name></name-alternatives><bio xml:lang="en"><p>D-06099 Halle</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Reller</surname><given-names>A.</given-names></name></name-alternatives><bio xml:lang="en"><p>D-86159 Augsburg</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Loidl</surname><given-names>A.</given-names></name></name-alternatives><bio xml:lang="en"><p>D-86159 Augsburg</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg</institution><country>Germany</country></aff><aff xml:lang="en" id="aff-2"><institution>Solid State Chemistry, Martin-Luther University Halle-Wittenberg</institution><country>Germany</country></aff><aff xml:lang="en" id="aff-3"><institution>Resource Strategy, University of Augsburg</institution><country>Germany</country></aff><pub-date pub-type="collection"><year>2014</year></pub-date><pub-date pub-type="epub"><day>18</day><month>06</month><year>2014</year></pub-date><volume>16</volume><issue>2</issue><issue-title>SPECIAL ISSUE dedicated to Boris I. Kochelaev's 80th birthday</issue-title><elocation-id>14210 (10 pp.)</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Schmidt B., Krug von Nidda H.-., Riegg S., Ebbinghaus S.G., Reller A., Loidl A., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Schmidt B., Krug von Nidda H.-., Riegg S., Ebbinghaus S.G., Reller A., Loidl A.</copyright-holder><copyright-holder xml:lang="en">Schmidt B., Krug von Nidda H.-., Riegg S., Ebbinghaus S.G., Reller A., Loidl A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.mrsej.ru/jour/article/view/148">https://www.mrsej.ru/jour/article/view/148</self-uri><abstract><p>LaCu3RuxTi4-xO12 undergoes a metal-to-insulator transition (MIT) from a heavy-fermion metal (x = 4) with moderately enhanced electronic masses to an antiferromagnetic insulator (x = 0) with colossal dielectric constants. So far, the exact value xc of the MIT could not be obtained from electrical resistivity or specific-heat data, which are governed by local-moment scattering and Schottky anomalies, respectively. To investigate the MIT by electron spin resonance (ESR) technique, polycrystalline samples of the solid-solution series La1-yGdyCu3RuxTi4-xO12 were synthesized for the substitution range 1 ≤ x ≤ 4 and 0.05 ≤ y ≤ 0.15, where Gd3+ (8S7/2 ground state) serves as ESR probe. For x = 4 the Gd3+ ESR linewidth exhibits an enhanced Korringa relaxation at low temperatures (T&lt;50 K) as typically expected for heavy-fermion metals. This metallic contribution gradually diminishes on decreasing Ru content x and vanishes for x = 2.25 localizing the MIT close to the onset of spin-glass behavior arising for x ≤ 2.</p></abstract><kwd-group xml:lang="en"><kwd>heavy fermions</kwd><kwd>metal-to-insulator transition</kwd><kwd>electron spin resonance</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Andres K., Graebner J. E., Ott H. R., Phys. Rev. Lett. 35, 1779 (1975).</mixed-citation><mixed-citation xml:lang="en">Andres K., Graebner J. E., Ott H. R., Phys. Rev. Lett. 35, 1779 (1975).</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Steglich F., Aarts J., Bredl C. D., Lieke W., Meschede D., Franz W., Sch¨afer H., Phys. Rev. Lett. 43, 1892 (1979).</mixed-citation><mixed-citation xml:lang="en">Steglich F., Aarts J., Bredl C. D., Lieke W., Meschede D., Franz W., Sch¨afer H., Phys. Rev. Lett. 43, 1892 (1979).</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Trovarelli O., Geibel C., Mederle S., Langhammer C., Grosche F. M., Gegenwart P., Lang M., Sparn G., Steglich F., Phys. Rev. Lett. 85, 626 (2000).</mixed-citation><mixed-citation xml:lang="en">Trovarelli O., Geibel C., Mederle S., Langhammer C., Grosche F. M., Gegenwart P., Lang M., Sparn G., Steglich F., Phys. Rev. Lett. 85, 626 (2000).</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Stewart G. R., Rev. Mod. Phys. 56, 755 (1984).</mixed-citation><mixed-citation xml:lang="en">Stewart G. R., Rev. Mod. Phys. 56, 755 (1984).</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Kondo S., Johnston D. C., Swenson C. A., Borsa F., Mahajan A. V., Miller L. L., Gu T., Goldman A. I., Maple M. B., Gajewski D. A., Freeman E. J., Dilley N. R., Merrin J., Kojima</mixed-citation><mixed-citation xml:lang="en">Kondo S., Johnston D. C., Swenson C. A., Borsa F., Mahajan A. V., Miller L. L., Gu T., Goldman A. I., Maple M. B., Gajewski D. A., Freeman E. J., Dilley N. R., Merrin J., Kojima</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">K., Luke G. M., Uemura Y. J., Chmaissem O., Jorgensen J. D., Phys. Rev. Lett. 78, 3729 (1997).</mixed-citation><mixed-citation xml:lang="en">K., Luke G. M., Uemura Y. J., Chmaissem O., Jorgensen J. D., Phys. Rev. Lett. 78, 3729 (1997).</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Heinrich M., Krug von Nidda H.-A., Fritsch V., Loidl A., Phys. Rev. B 63, 193103 (2001).</mixed-citation><mixed-citation xml:lang="en">Heinrich M., Krug von Nidda H.-A., Fritsch V., Loidl A., Phys. Rev. B 63, 193103 (2001).</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Krug von Nidda H.-A., Bulla R., B¨uttgen N., Heinrich M., Loidl A., Eur. Phys. J. B 34, 399 (2003).</mixed-citation><mixed-citation xml:lang="en">Krug von Nidda H.-A., Bulla R., B¨uttgen N., Heinrich M., Loidl A., Eur. Phys. J. B 34, 399 (2003).</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Sichelschmidt J., Ivanshin V. A., Ferstl J., Geibel C., Steglich F., Phys. Rev. Lett. 91, 156401 (2003).</mixed-citation><mixed-citation xml:lang="en">Sichelschmidt J., Ivanshin V. A., Ferstl J., Geibel C., Steglich F., Phys. Rev. Lett. 91, 156401 (2003).</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Förster T., Sichelschmidt J., Krellner C., Geibel C., Steglich F., J. Phys.: Condens. Matter 22, 435603 (2010).</mixed-citation><mixed-citation xml:lang="en">Förster T., Sichelschmidt J., Krellner C., Geibel C., Steglich F., J. Phys.: Condens. Matter 22, 435603 (2010).</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Elschner B., Loidl A., in Gschneidner K. A. Jr., Eyring L. (eds.), Handbook on the Physics and Chemistry of Rare Earths, Vol. 24, p. 221 (Elsevier Science B. V., Amsterdam, 1997).</mixed-citation><mixed-citation xml:lang="en">Elschner B., Loidl A., in Gschneidner K. A. Jr., Eyring L. (eds.), Handbook on the Physics and Chemistry of Rare Earths, Vol. 24, p. 221 (Elsevier Science B. V., Amsterdam, 1997).</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Schlott M., Elschner B., Herrmann M., Assmus W., Z. Phys. B 72 385 (1988).</mixed-citation><mixed-citation xml:lang="en">Schlott M., Elschner B., Herrmann M., Assmus W., Z. Phys. B 72 385 (1988).</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Krug von Nidda H.-A., Sch¨utz A., Heil M., Elschner B., Loidl A., Phys. Rev. B 57, 14344 (1998).</mixed-citation><mixed-citation xml:lang="en">Krug von Nidda H.-A., Sch¨utz A., Heil M., Elschner B., Loidl A., Phys. Rev. B 57, 14344 (1998).</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Mair S., Krug von Nidda H.-A., Lohmann M., Loidl A., Phys. Rev. B 60 16409 (1999).</mixed-citation><mixed-citation xml:lang="en">Mair S., Krug von Nidda H.-A., Lohmann M., Loidl A., Phys. Rev. B 60 16409 (1999).</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Ramirez A. P., Lawes G., Li D., Subramanian M. A., Solid State Commun. 131, 251 (2004).</mixed-citation><mixed-citation xml:lang="en">Ramirez A. P., Lawes G., Li D., Subramanian M. A., Solid State Commun. 131, 251 (2004).</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">B¨uttgen N., Krug von Nidda H.-A., Kraetschmer W., G¨unther A., Widmann S., Riegg S., Krimmel A., Loidl A., J. Low Temp. Phys. 161, 148 (2010).</mixed-citation><mixed-citation xml:lang="en">B¨uttgen N., Krug von Nidda H.-A., Kraetschmer W., G¨unther A., Widmann S., Riegg S., Krimmel A., Loidl A., J. Low Temp. Phys. 161, 148 (2010).</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Kobayashi W., Terasaki I., Takeya J.-I., Tsukada I., Ando Y., J. Phys. Soc. Jpn. 73, 2373 (2004).</mixed-citation><mixed-citation xml:lang="en">Kobayashi W., Terasaki I., Takeya J.-I., Tsukada I., Ando Y., J. Phys. Soc. Jpn. 73, 2373 (2004).</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Krimmel A., G¨unther A., Kraetschmer W., Dekinger H., B¨uttgen N., Loidl A., Ebbinghaus S. G., Scheidt E.-W., Scherer W., Phys. Rev. B 78, 165126 (2008).</mixed-citation><mixed-citation xml:lang="en">Krimmel A., G¨unther A., Kraetschmer W., Dekinger H., B¨uttgen N., Loidl A., Ebbinghaus S. G., Scheidt E.-W., Scherer W., Phys. Rev. B 78, 165126 (2008).</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Krimmel A., G¨unther A., Kr¨atschmer W., Dekinger H., B¨uttgen N., Eyert V., Loidl A., Sheptyakov D. V., Scheidt E.-W., Scherer W., Phys. Rev. B 80, 121101 (2009).</mixed-citation><mixed-citation xml:lang="en">Krimmel A., G¨unther A., Kr¨atschmer W., Dekinger H., B¨uttgen N., Eyert V., Loidl A., Sheptyakov D. V., Scheidt E.-W., Scherer W., Phys. Rev. B 80, 121101 (2009).</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Dittl A., Krohns S., Sebald J., Schrettle F., Hemmida M., Krug von Nidda H.-A., Riegg S., Reller A., Ebbinghaus S. G., Loidl A., Eur. Phys. J. B 79, 391 (2011).</mixed-citation><mixed-citation xml:lang="en">Dittl A., Krohns S., Sebald J., Schrettle F., Hemmida M., Krug von Nidda H.-A., Riegg S., Reller A., Ebbinghaus S. G., Loidl A., Eur. Phys. J. B 79, 391 (2011).</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Ebbinghaus S. G., Weidenkaff A., Cava R. J., J. Solid State Chem. 167, 126 (2002).</mixed-citation><mixed-citation xml:lang="en">Ebbinghaus S. G., Weidenkaff A., Cava R. J., J. Solid State Chem. 167, 126 (2002).</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Ebbinghaus S. G., Riegg S., G¨otzfried T., Reller A., Eur. Phys. J. Special Topics 180, 91 (2010).</mixed-citation><mixed-citation xml:lang="en">Ebbinghaus S. G., Riegg S., G¨otzfried T., Reller A., Eur. Phys. J. Special Topics 180, 91 (2010).</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Rodriguez-Carvajal J., Physica B 192, 55 (1993).</mixed-citation><mixed-citation xml:lang="en">Rodriguez-Carvajal J., Physica B 192, 55 (1993).</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">Feher G., Kip A. F., Phys. Rev. 98, 337 (1955).</mixed-citation><mixed-citation xml:lang="en">Feher G., Kip A. F., Phys. Rev. 98, 337 (1955).</mixed-citation></citation-alternatives></ref><ref id="cit25"><label>25</label><citation-alternatives><mixed-citation xml:lang="ru">Dyson F. J., Phys. Rev. 98, 349 (1955).</mixed-citation><mixed-citation xml:lang="en">Dyson F. J., Phys. Rev. 98, 349 (1955).</mixed-citation></citation-alternatives></ref><ref id="cit26"><label>26</label><citation-alternatives><mixed-citation xml:lang="ru">Joshi J. P., Bhat S. V., J. Magn. Reson. 168, 284 (2004).</mixed-citation><mixed-citation xml:lang="en">Joshi J. P., Bhat S. V., J. Magn. Reson. 168, 284 (2004).</mixed-citation></citation-alternatives></ref><ref id="cit27"><label>27</label><citation-alternatives><mixed-citation xml:lang="ru">Coldea M., Schaeffer H., Weissenberger V., Elschner B., Z. Phys. B 68, 25 (1987).</mixed-citation><mixed-citation xml:lang="en">Coldea M., Schaeffer H., Weissenberger V., Elschner B., Z. Phys. B 68, 25 (1987).</mixed-citation></citation-alternatives></ref><ref id="cit28"><label>28</label><citation-alternatives><mixed-citation xml:lang="ru">Cox D. L., Bickers N. E., Wilkins J. W., J. Appl. Phys. 57, 3166 (1985).</mixed-citation><mixed-citation xml:lang="en">Cox D. L., Bickers N. E., Wilkins J. W., J. Appl. Phys. 57, 3166 (1985).</mixed-citation></citation-alternatives></ref><ref id="cit29"><label>29</label><citation-alternatives><mixed-citation xml:lang="ru">Abragam A., Bleaney B., Electron Paramagnetic Resonance of Transition Ions (Clarendon, Oxford, 1970).</mixed-citation><mixed-citation xml:lang="en">Abragam A., Bleaney B., Electron Paramagnetic Resonance of Transition Ions (Clarendon, Oxford, 1970).</mixed-citation></citation-alternatives></ref><ref id="cit30"><label>30</label><citation-alternatives><mixed-citation xml:lang="ru">Dengler E., Deisenhofer J., Krug von Nidda H.-A., Khim S., Kim J. S., Kim K. H., Casper F., Felser C., Loidl A., Phys. Rev. B 81, 024406 (2010).</mixed-citation><mixed-citation xml:lang="en">Dengler E., Deisenhofer J., Krug von Nidda H.-A., Khim S., Kim J. S., Kim K. H., Casper F., Felser C., Loidl A., Phys. Rev. B 81, 024406 (2010).</mixed-citation></citation-alternatives></ref><ref id="cit31"><label>31</label><citation-alternatives><mixed-citation xml:lang="ru">Tokura Y., Taguchi Y., Okada Y., Fujishima Y., Arima T., Kumagai K., Iye Y., Phys. Rev. Lett. 70, 2126 (1993).</mixed-citation><mixed-citation xml:lang="en">Tokura Y., Taguchi Y., Okada Y., Fujishima Y., Arima T., Kumagai K., Iye Y., Phys. Rev. Lett. 70, 2126 (1993).</mixed-citation></citation-alternatives></ref><ref id="cit32"><label>32</label><citation-alternatives><mixed-citation xml:lang="ru">Taguchi Y., Tokura Y., Arima T., Inaba F., Phys. Rev. B 48, 511 (1993).</mixed-citation><mixed-citation xml:lang="en">Taguchi Y., Tokura Y., Arima T., Inaba F., Phys. Rev. B 48, 511 (1993).</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
