期刊
PHYSICAL REVIEW B
卷 93, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.93.014417
关键词
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资金
- National Natural Science Foundation of China [51332006, 11274270]
- NSF [DMR-1066158]
- FNR Luxembourg Grant [FNR/P12/4853155/Kreisel, INTER/MOBILITY/15/9890527 GREENOX]
- MINECO-Spain [MAT2013-40581-P]
We consider orthoferrite and orthochromite perovskites with the formula RMO3, where R is a lanthanide and M is Fe or Cr. We identify an atomistic interaction that couples the magnetic moments of the R and M cations with the oxygen octahedral rotations characterizing these crystals. We show that this interaction results in an effective magnetic field acting on the R atoms, which in turn explains several intriguing features of these compounds, such as the existence (or absence) of a net magnetization associated with the R sublattice and its crystallographic direction. Further, considered together with the couplings described by L. Bellaiche et al. [J. Phys.: Condens. Matter 24, 312201 (2012)], this interaction explains why some RMO3 compounds display a compensation temperature at which the magnetization cancels and changes sign, while others do not.
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