Cubic-Tetragonal Transition and Antiferromagnetism of α'-MnZn3

Autor:	Hidema Uchishiba, Yasuaki Nakagawa, Tomiei Hori
Rok vydání:	1969
Předmět:	Materials science Condensed matter physics Alloy Neutron diffraction General Physics and Astronomy engineering.material Condensed Matter::Materials Science Magnetization Tetragonal crystal system Ferromagnetism Remanence engineering Antiferromagnetism Stacking fault
Zdroj:	Journal of the Physical Society of Japan. 27:600-604
ISSN:	1347-4073 0031-9015
DOI:	10.1143/jpsj.27.600
Popis:	The low temperature transition of α'-MnZn 3 alloy of Cu 3 Au type structure has been investigated by X-ray and neutron diffraction experiments, dilatometry, magnetization measurements and specific heat measurements. This alloy exhibits antiferromagnetism below 130°K, at which the cubic lattice is transformed to the tetragonal lattice, the axial ratio c / a being 0.95. On heating, both the tetragonality and sublattice magnetization vanish abruptly, indicating that this transition is of the first kind. The integrated value of the anomalous specific heat and the entropy change due to the transition are in rough agreement with those calculated by taking only the magnetic contribution into account. Apart from this transition, the field dependence of susceptibility becomes appreciable below 170°K, and the remanent magnetization appears below 60°K. These behaviours are probably due to the stacking fault in the fcc lattice, since the corresponding hcp lattice of metastable e '-MnZn 3 is ferromagnetic.
Databáze:	OpenAIRE
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