Magnetic and crystallographic properties of NdCo sub 4 M (M=B, Al, and Ga)

Journal Article · Tue May 01 04:00:00 EDT 1990 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.344837· OSTI ID:6906436

Ido, H; Wallace, W E; Suzuki, T; Cheng, S F; Sinha, V K; Sankar, S G ^[1]

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1. MEMS Department, Carnegie Mellon University, Pittsburgh, PA (USA) Carnegie Mellon Research Institute, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (USA)

The magnetic and crystallographic properties have been investigated for NdCo{sub 4}M (M=B, Al, and Ga). The temperature dependencies of lattice parameters have been determined between 80 and 730 K by x-ray diffraction. NdCo{sub 4}B crystallizes in the CeCo{sub 4}B-type structure, whereas NdCo{sub 4}M (M=Al and Ga) exhibits a CaCu{sub 5}-type structure. Magnetic properties of NdCo{sub 4}B show a clear difference from those of its Al and Ga counterparts. All these compounds exhibit planar anisotropy in the low-temperature regime, and the spin-reorientation temperature is found to be {similar to}280 K for NdCo{sub 4}Al and NdCo{sub 4}Ga, whereas NdCo{sub 4}B is planar up to its Curie temperature. Thermal expansion curves of {ital c} axes show an anomalous contraction for NdCo{sub 4}B and expansion for NdCo{sub 4}Al and NdCo{sub 4}Ga only in the temperature region of planar anisotropy.

• OSTI ID: 6906436
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 67:9; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOY SYSTEMS
ALLOYS
ALUMINIUM ALLOYS
ANISOTROPY
BORON ALLOYS
COBALT ALLOYS
COHERENT SCATTERING
CRYSTALLOGRAPHY
DIFFRACTION
EXPANSION
GALLIUM ALLOYS
HIGH TEMPERATURE
LATTICE PARAMETERS
LOW TEMPERATURE
MAGNETIC PROPERTIES
MEDIUM TEMPERATURE
NEODYMIUM ALLOYS
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
SCATTERING
TEMPERATURE DEPENDENCE
TERNARY ALLOY SYSTEMS
THERMAL EXPANSION
X-RAY DIFFRACTION