Anomalous Hall effect of Nd0.7Sr0.3MnO3 films with large magnetoresistance ratio: Evidence of Berry phase effect

H. C. Yang*, L. M. Wang, H. E. Horng

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

18 引文 斯高帕斯(Scopus)

摘要

The transverse Hall resistivity, ρxy, and magnetization, M, of [110] and [100] oriented epitaxial Nd0.7Sr0.3MnO3 films with large magnetoresistance were measured as a function of temperature and applied magnetic field to study the ordinary and spontaneous Hall coefficients. In the ferromagnetic regime, 100 K <T<200 K, (-Rs/Ro)×T was found to be proportional to exp(-Ec/kBT), where Rs is the spontaneous Hall coefficient, Ro is the ordinary Hall coefficient, and Ec is the core energy of the magnetic dipole. In addition, Rs was found to be proportional to ρxx2 in the low-temperature regime (T<160 K) where the ordinary Hall coefficient, Ro, is independent of temperature. A scaling behavior, Rs∝ρxx was observed at high temperatures (T>160 K). Hall effects of [110] and [100] oriented films are compared to each other. The results are discussed in terms of the exiting theories.

原文英語
文章編號174415
頁(從 - 到)1744151-1744156
頁數6
期刊Physical Review B - Condensed Matter and Materials Physics
64
發行號17
出版狀態已發佈 - 2001 11月 1

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學

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