mriselMagnetic Resonance in SolidsMagnetic Resonance in Solids2072-5981Kazan Federal Universitymrisel-176Research ArticleСтатьиSpin dynamics and charge order-disorder phase transition detected by EPR in α'-(BEDT-TTF)2IBr2DmitrievA. I.

Semenova, 1, Chernogolovka 142432

aid@icp.ac.ruChernenkayaA. S.

Semenova, 1, Chernogolovka 142432

Institute of Problems of Chemical Physics Russian Academy of SciencesRussian Federation2010200120241221721Copyright © Dmitriev A.I., Chernenkaya A.S., 20242024Dmitriev A.I., Chernenkaya A.S.Dmitriev A.I., Chernenkaya A.S.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.mrsej.ru/jour/article/view/176

Stepwise changes in electron paramagnetic resonance (EPR) parameters (integral intensity, linewidth) accompanying localization of charge carriers have been found in the α'-(BEDT-TTF)2IBr2 crystals. In single crystal exchange narrowing of the EPR lines and sharp decrease in static and dynamic magnetic susceptibility caused by antiferromagnetic interaction of localized charge carriers is observed at T < 50 K. At T > 50 K a difference between static and dynamic magnetic susceptibility is observed in the α'-(BEDT-TTF)2IBr2 crystals which is due to that the frequency of thermally activated charge carrier jumps is higher than the microwave frequency of measuring field of an EPR spectrometer.

charge orderorder-disorderBEDT-TTFReferencesIshiguro T., Yamaji K. Organic superconductors, Springer-Verlag, Berlin, Heidelberg (1989).Ishiguro T., Yamaji K. Organic superconductors, Springer-Verlag, Berlin, Heidelberg (1989).Watanabe M., Nishikawa M., Nogami Y., Oshima K., Saito G. J. Kor. Phys. Soc. 31, 215 (1997).Watanabe M., Nishikawa M., Nogami Y., Oshima K., Saito G. J. Kor. Phys. Soc. 31, 215 (1997).Yagubskii E.B., Shchegolev I.F., Shibaeva R.P., Fedutin D.N., Rozenberg L.P., Sogomonyan E.M., Lobkovskaya R.M., Laukhin V.N., Ignat'ev A.A., Zvarykina A.V., Buravov L.I. JETP Letters 42, 206 (1985).Yagubskii E.B., Shchegolev I.F., Shibaeva R.P., Fedutin D.N., Rozenberg L.P., Sogomonyan E.M., Lobkovskaya R.M., Laukhin V.N., Ignat'ev A.A., Zvarykina A.V., Buravov L.I. JETP Letters 42, 206 (1985).Yue Y., Nakano C., Yamamoto K., Uruichi M., Wojciechowski R., Inokuchi M., Yakushi K., Kawamoto A. J. of Phys. Soc. Jpn. 78, 044701 (2009).Yue Y., Nakano C., Yamamoto K., Uruichi M., Wojciechowski R., Inokuchi M., Yakushi K., Kawamoto A. J. of Phys. Soc. Jpn. 78, 044701 (2009).Yue Y., Nakano C., Yamamoto K. Uruichi M., Yakushi K., Kawamoto A. J. Phys.: Conf. Ser. 132, 012007 (2008).Yue Y., Nakano C., Yamamoto K. Uruichi M., Yakushi K., Kawamoto A. J. Phys.: Conf. Ser. 132, 012007 (2008).Morgunov R.B., Shibaeva R.P., Yagybskii E.B., Kato T., Tanimoto Y. JETP 102, 121 (2006).Morgunov R.B., Shibaeva R.P., Yagybskii E.B., Kato T., Tanimoto Y. JETP 102, 121 (2006).Morgunov R., Dmitriev A., Chernenkaya A., Yamamoto K., Yakushi K., Tanimoto Y. Physica B 405, S138 (2010).Morgunov R., Dmitriev A., Chernenkaya A., Yamamoto K., Yakushi K., Tanimoto Y. Physica B 405, S138 (2010).Morgunov R., Dmitriev A., Chernenkaya A., Yakushi K., Yamamoto K. JETP 111, 970 (2010).Morgunov R., Dmitriev A., Chernenkaya A., Yakushi K., Yamamoto K. JETP 111, 970 (2010).SuganoT., SaitoG., KinoshitaM. Phys. Rev. B 35, 6554 (1987).SuganoT., SaitoG., KinoshitaM. Phys. Rev. B 35, 6554 (1987).Parkin S.S.P., Miljak M., Cooper J.R. Phys. Rev. B 34, 1485 (1986).Parkin S.S.P., Miljak M., Cooper J.R. Phys. Rev. B 34, 1485 (1986).Johnston D.C., Kremer R.K., Troyer M. Wang X., Klümper A., Bud’ko S.L., Panchula A.F., Canfield P.C. Phys. Rev. B 61, 9558 (2000).Johnston D.C., Kremer R.K., Troyer M. Wang X., Klümper A., Bud’ko S.L., Panchula A.F., Canfield P.C. Phys. Rev. B 61, 9558 (2000).Anderson P.W., Weiss P.R. Rev. Mod. Phys. 25, 269 (1953).Anderson P.W., Weiss P.R. Rev. Mod. Phys. 25, 269 (1953).

The authors declare that there are no conflicts of interest present.