Investigation of magnetic properties of NdMn{sub 2}(Ge{sub 1{minus}x}Si{sub x}){sub 2}
- State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, Peoples Republic of (China)
- Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, Peoples Republic of (China)
The structure and magnetic properties of NdMn{sub 2}(Ge{sub 1{minus}x}Si{sub x}){sub 2} compounds (x=0{endash}1.0) have been investigated. All the compounds crystallize in ThCr{sub 2}Si{sub 2}-type structure. Substitution of Si for Ge leads to a linear decrease of the lattice constants and the unit-cell volume. With increasing temperature, for the compounds with x{le}0.5, both spin reorientation and ferromagnetic{endash} paramagnetic transition are observed as well at T{sub r} and T{sub C}(Mn), respectively. The spin reorientation temperature T{sub r} and the Curie temperature T{sub C}(Mn) decrease linearly with Si content from 215 and 339 K at x=0{endash}40 and 306 K at x=0.5, respectively. In compounds with 0.3{lt}x{le}0.5 the ferromagnetic component and the antiferromagnetic component may coexit. For compounds with x{ge}0.6 the ferromagnetic{endash}antiferromagnetic and the antiferromagnetic{endash}paramagnetic transition are observed and the Curie temperature T{sub C}(Nd) decreases monotonically while the N{acute e}el temperature T{sub N}(Mn) increases monotonically with Si content. A tendentious spin phase diagram has been obtained. The saturation magnetization at 1.5 K decreases first, goes through a minimum at x=0.5, and then increases again. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 530018
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 12 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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