The transverse Hall resistivity, ρxy, and magnetization, M, of  and  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  and  oriented films are compared to each other. The results are discussed in terms of the exiting theories.
|Number of pages||6|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2001 Nov 1|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics