Structure and magnetic properties of RNi{sub 2}Mn compounds (R=Tb, Dy, Ho, and Er)

Journal Article · Wed Mar 01 00:00:00 EST 2006 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.73.0· OSTI ID:20787962

Wang, J L ^[1]; Marquina, C; Ibarra, M R ^[2]; Wu, G H ^[1]

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1. State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080 (China)
2. Departmento de Fisica de la Materia Condensada-Instituto de Ciencia de Materiales de Aragon, Universidad de Zaragoza-CSIC, Pedro Cerbuna 12, 50009 Zaragoza (Spain)

The compounds RNi{sub 2}Mn (R=Tb, Dy, Ho, and Er) with a MgCu{sub 2}-type structure have been synthesized. The R to transition metal atom ratio is confirmed to be 1:3 using the energy dispersive spectroscopy. The structural and magnetic properties have been investigated by various experimental methods. The x-ray diffraction patterns (XRD) can be well indexed with a cubic Laves cell and space group Fd3m. The refinement results of the XRD patterns show the presence of vacancies in the crystallographic structure. The ordering temperatures T{sub C} have been derived to be 131, 94, 75, and 50 K for R=Tb, Dy, Ho and Er, respectively, which are much higher than those of their corresponding RNi{sub 2} and RMn{sub 2} compounds. A large difference of M-T curves between zero-field-cooling and field-cooling magnetization for all samples at a certain temperature range is observed in a low field, which can be understood in the terms of narrow-domain-wall pinning and a sensitive temperature dependence of coercivity.

• OSTI ID: 20787962
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 73, Issue 9; Other Information: DOI: 10.1103/PhysRevB.73.094436; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COERCIVE FORCE
CRYSTALS
CUBIC LATTICES
DYSPROSIUM ALLOYS
ERBIUM ALLOYS
FERRIMAGNETIC MATERIALS
HOLMIUM ALLOYS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETIZATION
MANGANESE ALLOYS
NICKEL ALLOYS
SPACE GROUPS
TEMPERATURE DEPENDENCE
TERBIUM ALLOYS
TRANSITION ELEMENTS
VACANCIES
X-RAY DIFFRACTION