Spin Wave Stiffness Constant of Laves Phase Invar Compound (Zr0.7Nb0.3)Fe2

Shigehumi Onodera; Yoshikazu Ishikawa; Masayuki Shiga; Ze Xianyu; Yoji Nakamura

doi:10.1143/JPSJ.51.2705

Journal of the Physical Society of Japan

Online ISSN : 1347-4073
Print ISSN : 0031-9015
ISSN-L : 0031-9015

Spin Wave Stiffness Constant of Laves Phase Invar Compound (Zr_0.7Nb_0.3)Fe₂

Shigehumi Onodera, Yoshikazu Ishikawa, Masayuki Shiga, Ze Xianyu, Yoji Nakamura

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1982 Volume 51 Issue 9 Pages 2705-2706

DOI https://doi.org/10.1143/JPSJ.51.2705

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Abstract

The spin wave stiffness constant of a Laves phase invar compound (Zr_0.7Nb_0.3)Fe₂ at low temperatures was estimated to be 350±50 meVA² by inelastic neutron scattering experiment above room temperature. This value is significantly greater than the value (125 meVA²) of the spin wave stiffness constant deduced from the magnetization measurement. Such a discrepancy has been found in all other Invar materials.

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