Journal
PHYSICAL REVIEW B
Volume 79, Issue 21, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.212414
Keywords
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Funding
- CSIC/BAS [2005BG0016]
- Bulgarian Science Foundation [TK-X-1712/2007, BY-X-308/2007]
- MEC of the Spanish Government [MAT2008-06761-C03, CSD200700041]
- European Union [FP6-03321]
- Deutsche Forschungsgemeinschaft [RI 932/4-1]
- ICREA Funding Source: Custom
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The anisotropic paramagnetic susceptibility of single crystals of the hexagonal manganites RMnO3 (R= Ho, Er, Tm, Yb, and Lu) is studied. It is found that the anisotropy of the paramagnetic Curie temperature along the sixfold axis and in the basal plane, theta(parallel to)-theta(perpendicular to), is determined not by the anisotropic Mn-O-Mn interactions but rather by the quadrupolar charge distribution of the 4f shells of the rare-earth ions. These findings disclose the decisive role of the R ions in forming the paramagnetic behavior of RMnO3 and suggest a subtle interplay between the charge-density distribution of rare-earths and the symmetry of the spin-ordering of the Mn sublattices.
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