Investigation of magnetic properties of NdMn{sub 2}(Ge{sub 1{minus}x}Si{sub x}){sub 2}

Journal Article · Sun Jun 01 04:00:00 EDT 1997 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.365191· OSTI ID:530018

Wang, Y ^[1]; Yang, F ^[1]; Chen, C ^[2]; Tang, N ^[1]; Wang, Q ^[2]

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1. State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, Peoples Republic of (China)
2. 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

Related Subjects

36 MATERIALS SCIENCE
ANTIFERROMAGNETIC MATERIALS
CRYSTAL STRUCTURE
CURIE POINT
FERROMAGNETIC MATERIALS
GERMANIUM ALLOYS
MAGNETIC PROPERTIES
MAGNETIZATION
MANGANESE ALLOYS
NEEL TEMPERATURE
NEODYMIUM ALLOYS
PHASE TRANSFORMATIONS
SILICON ALLOYS