Breakdown of the Field-Induced Superconductivity by Dynamical Spin Reversal

Breakdown of the Field-Induced Superconductivity by Dynamical Spin Reversal
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动态自旋反转对场致超导性的破坏

DOI：
10.1103/physrevb.86.024525
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发表时间：
2012
期刊：
Phys. Rev. B
影响因子：
--
通讯作者：
and H. Kobayashi
and H. Kobayashi
中科院分区：
--
文献类型：
--
作者：
Y. Oshima;H. Nojiri;S. Uji;J. S. Brooks;T. Tokumoto;H.-B. Cui;R. Kato;A. Kobayashi;and H. Kobayashi

文献摘要

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准二维分子导体-(BETS)FeCl，其中BETS是双(乙撑二硫)四硒富瓦烯，在高磁场环境下表现出超导性。这是由于铁磁矩产生的外部场和内部场之间的补偿效应。在这里，我们报告了在低至 1.65 K 的场致超导状态下的同步输运和电子自旋共振 (ESR) 测量。我们发现场致超导性被 ESR 跃迁部分破坏，即 Fe 的动态自旋反转。此外，从我们的ESR结果发现，场致超导态是不均匀的，与残余顺磁金属态共存。
The quasi-two-dimensional molecular conductor-(BETS)FeCl, where BETS is bis(ethylenedithio)tetraselenafulvalene, shows a superconductivity in the high magnetic field environment. This is due to the compensation effect between the external field and the internal field created by the Femagnetic moment. Here, we report the simultaneous transport and electron spin resonance (ESR) measurements in the field-induced superconducting state down to 1.65 K. We find that the field-induced superconductivity is partially destroyed by ESR transitions, namely, by dynamical spin reversals of Fe. Moreover, it is found from our ESR results that the field-induced superconducting state is inhomogeneous, coexisting with the residual paramagnetic metal state.