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Crystal structure and magnetic properties of mixed compounds Nd 1– x R x Co 3 (R = Gd, Tb)
Author(s) -
Ouyang Z. W.,
Rao G. H.,
Liu W. F.,
Liu G. Y.,
Feng X. M.,
Liang J. K.
Publication year - 2005
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200440042
Subject(s) - magnetocrystalline anisotropy , magnetization , anisotropy , magnetic anisotropy , crystal structure , diffraction , materials science , saturation (graph theory) , condensed matter physics , crystallography , x ray crystallography , ion , chemistry , magnetic field , physics , optics , mathematics , organic chemistry , quantum mechanics , combinatorics
The crystal structure and magnetic properties of Nd 1– x R x Co 3 (R = Gd, Tb) have been investigated by means of X‐ray powder diffraction and magnetic measurements. Spin reorientation and magnetization compensation are observed in both systems. The saturation magnetization M S of Nd 1– x Tb x Co 3 exhibits an anomaly at a critical concentration x c ≈ 0.55, whereas no such an anomaly is observed for Nd 1– x Gd x Co 3 . These observations could be understood by considering the difference of the anisotropy between Tb 3+ and Gd 3+ ions. The type of magnetocrystalline anisotropy of the compounds is derived based on X‐ray diffraction patterns of the field‐aligned samples. For Nd 1– x Tb x Co 3 , the anisotropy near x c is weak with an undefined easy magnetization direction. On the Nd‐rich side, the anisotropy exhibits a strong temperature dependence. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)