Magnetic properties of R TiCo sub 11 compounds with the ThMn sub 12 structure

Journal Article · Fri Nov 15 04:00:00 EST 1991 · Journal of Applied Physics; (United States)

DOI:https://doi.org/10.1063/1.350069· OSTI ID:5164438

Ohashi, K ^[1]; Ido, H; Konno, K ^[2]; Yoneda, Y ^[1]

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1. Magnetic Materials R D Center, Shin-Etsu Chemical Co. Ltd., Takefu, Fukui 915 (Japan)
2. Faculty of Engineering, Tohoku Gakuin University. Tagajyo, Miyagi 985 (Japan)

Magnetic properties of {ital R}TiCo{sub 11} ({ital R}=Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, and Er) compounds with the ThMn{sub 12} structure were investigated in the temperature range from 4.2 to 1400 K. The Curie temperatures of this series exceed 1000 K and the Co atomic moments were found to take the values ranging from 0.99 to 1.80 {mu}{sub {ital B}}, which depend on {ital R}. The easy magnetization direction of {ital R}TiCo{sub 11} was found to be axial({ital c}{parallel}) for {ital R} except being planar for {ital R}=Sm and Er. This result suggests that the {ital R} sublattice with a positive Stevens factor demonstrates planar anisotropy. The Co sublattice anisotropy constant was estimated to be {ital K}{sub 1} = 7.5 {times} 10{sup 6} erg/cc at room temperature from measurements on YTiCo{sub 11}. By subtracting {ital K}{sub 1} of YTiCo{sub 11} from {ital K}{sub 1} of DyTiCo{sub 11}, the anisotropy constant of the Dy sublattice was obtained to be 5.7{times}10{sup 6} erg/cc. Spin reorientation was also observed in {ital R}TiCo{sub 11} with {ital R}=Pr, Nd and Dy, which are considered to be an axial to planar one with increasing temperature.

• OSTI ID: 5164438
• Journal Information: Journal of Applied Physics; (United States), Journal Name: Journal of Applied Physics; (United States) Vol. 70:10; 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
CERIUM ALLOYS
COBALT ALLOYS
COBALT BASE ALLOYS
CURIE POINT
DYSPROSIUM ALLOYS
ERBIUM ALLOYS
GADOLINIUM ALLOYS
HIGH TEMPERATURE
HOLMIUM ALLOYS
LANTHANUM ALLOYS
LOW TEMPERATURE
MAGNETIC PROPERTIES
MAGNETIZATION
MEDIUM TEMPERATURE
NEODYMIUM ALLOYS
ORIENTATION
PHYSICAL PROPERTIES
PRASEODYMIUM ALLOYS
RARE EARTH ALLOYS
SAMARIUM ALLOYS
SPIN ORIENTATION
TEMPERATURE DEPENDENCE
TERBIUM ALLOYS
TERNARY ALLOY SYSTEMS
THERMODYNAMIC PROPERTIES
TITANIUM ALLOYS
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE
VERY HIGH TEMPERATURE
VERY LOW TEMPERATURE
YTTRIUM ALLOYS