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Crystal Structure and Magnetic Properties of Some Rare Earth Germanides
Author(s) -
Buschow K. H. J.,
Fast J. F.
Publication year - 1967
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.19670210217
Subject(s) - ferrimagnetism , antiferromagnetism , paramagnetism , germanium , magnetic moment , crystallography , rare earth , crystal structure , materials science , pauli exclusion principle , curie , condensed matter physics , ion , hexagonal crystal system , curie temperature , chemistry , ferromagnetism , magnetization , magnetic field , physics , metallurgy , organic chemistry , quantum mechanics , silicon
Magnetic and structural data are determined for eleven rare‐earth germanium compounds with the formula R 5 Ge 3 . These compounds are isotypic and have the hexagonal Mn 5 Si 3 type of structure. For R = Pr, Gd, Tb, Dy, Ho, and Er antiferromagnetic behaviour is observed at low temperatures. The antiferromagnetic exchange interaction is weak in these compounds. A field‐induced transition to a magnetic structure with a much higher moment is observed at 4.2 °K for Tb 5 Ge 3 , Dy 5 Ge 3 , Ho 5 Ge 3 and Er 5 Ge 3 . At low temperatures Nd 5 Ge 3 and probably also Ce 5 Ge 3 are ferrimagnetic. The Curie‐Weiss law is obeyed by all these compounds at high temperatures. The observed effective moments are close to those of the free trivalent rare earth ions. La 5 Ge 3 and Y 5 Ge 3 are Pauli paramagnetic.
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