Neutron diffraction studies on Dy(Cu{sub 1{minus}x}Ni{sub x}){sub 2}Si{sub 2}

Journal Article · Tue Apr 01 04:00:00 EST 1997 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.365116· OSTI ID:496445

Nashima, O; Ido, H ^[1]; Ohashi, M; Onodera, H; Yamaguchi, Y ^[2]

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1. Department of Applied Physics, Tohoku Gakuin University, Tagajo 985 (Japan)
2. Institute for Materials Research, Tohoku University, Sendai 980-77 (Japan)

Neutron powder diffraction studies have been made for Dy(Cu{sub 1{minus}x}Ni{sub x}){sub 2}Si{sub 2} with x=0, 0.06, and 0.1. The diffraction patterns of DyCu{sub 2}Si{sub 2} are consistent with the reported magnetic structure [{bold k}=(1/2,0,1/2)], the N{acute e}el temperature (T{sub N}=10 K) and the Dy magnetic moment (8.2 {mu}{sub B}). The diffraction patterns of Dy(Cu{sub 0.94}Ni{sub 0.06}){sub 2}Si{sub 2} and Dy(Cu{sub 0.9}Ni{sub 0.1}){sub 2}Si{sub 2} are interpreted by the same commensurate antiferromagnetic structures with {bold k}=(1/2,0,1/2). The N{acute e}el temperatures of Dy(Cu{sub 0.94}Ni{sub 0.06}){sub 2}Si{sub 2} and Dy(Cu{sub 0.9}Ni{sub 0.1}){sub 2}Si{sub 2} are determined to be 7.5 and 6.5 K, respectively. The magnetic moments are 6.5 {mu}{sub B}/Dy in the Dy(Cu{sub 0.94}Ni{sub 0.06}){sub 2}Si{sub 2} and 6.0 {mu}{sub B}/Dy in the Dy(Cu{sub 0.9}Ni{sub 0.1}){sub 2}Si{sub 2}. The magnetic moment decreases as the Ni concentration increases, whereas the Dy moment determined by the M{umlt o}ssbauer spectroscopy increases as {ital x} increases. There is a strong diffuse peak at the (1/2 0 1/2) position of Dy(Cu{sub 0.94}Ni{sub 0.1}){sub 2}Si{sub 2} which implies the existence of some kinds of short range ordering of Dy moments. This fact suggests that the local crystalline electric field with lowered symmetry breaks the perfect magnetic arrangement with {bold k}=(1/2,0,1/2) {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 496445
• Report Number(s): CONF-961141--
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
ANTIFERROMAGNETIC MATERIALS
COPPER ALLOYS
DYSPROSIUM ALLOYS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETIZATION
MOESSBAUER EFFECT
NEEL TEMPERATURE
NEUTRON DIFFRACTION
NICKEL ALLOYS
SILICON ALLOYS