Anisotropy compensation and magnetostriction in Tb sub x Dy sub 1 minus x (Fe sub 1 minus y T sub y ) sub 1. 9 (T=Co,Mn)
Journal Article
·
· Journal of Applied Physics; (USA)
- Naval Surface Warfare Center, 10901 New Hampshire Avenue, Silver Spring, Maryland 20903-5000 (US)
From magnetization ({ital M}) and magnetostriction ({lambda}) measurements as a function of magnetic field and stress, the temperatures of anisotropy compensation, {ital T}{sub {ital m}}, for technologically important Tb{sub {ital x}}Dy{sub 1{minus}{ital x}}(Fe{sub 1{minus}{ital y}}T{sub {ital y}}){sub 1.9} (T=Co,Mn (0.3{le}{ital x}{le}0.5) (0{le}{ital y}{le}0.3)) were determined. Measurements of {ital M} and {lambda} encompassing {ital T}{sub {ital m}} were made under compressive stresses from 8.8 to 36 MPa and for temperatures from {minus}196 to +130 {degree}C. In agreement with earlier measurements, {ital T}{sub {ital m}} decreases with increasing Tb. Substitution of Mn for Fe for fixed {ital x} also decreases {ital T}{sub {ital m}}. In contrast with these observations is the {ital increase} of the anisotropy compensation temperature with the replacement of Fe by small amounts of Co. In the cases of both (1) increasing Tb content and (2) increasing Co content, the Curie temperature {ital T}{sub {ital C}} increases, yielding, in general, a higher magnetic moment and saturation magnetostriction of these alloys. Thus, compensation at a given temperature may be obtained in an improved class of Laves phase compounds, R{sup (1)}{sub {ital x}}R{sup (2)}{sub 1{minus}{ital x}}(Fe{sub 1{minus}{ital y}}Co{sub {ital y}}){sub 2}, where rare earths R{sup (1)} and R{sup (2)} are, for example, Tb and Dy.
- OSTI ID:
- 5813398
- Journal Information:
- Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 69:8; ISSN 0021-8979; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360104* -- Metals & Alloys-- Physical Properties
ALLOY SYSTEMS
ALLOYS
COBALT ALLOYS
DYSPROSIUM ALLOYS
IRON ALLOYS
MAGNETIC PROPERTIES
MAGNETIZATION
MAGNETOSTRICTION
MANGANESE ALLOYS
PHYSICAL PROPERTIES
QUATERNARY ALLOY SYSTEMS
RARE EARTH ALLOYS
TEMPERATURE DEPENDENCE
TERBIUM ALLOYS
360102 -- Metals & Alloys-- Structure & Phase Studies
360104* -- Metals & Alloys-- Physical Properties
ALLOY SYSTEMS
ALLOYS
COBALT ALLOYS
DYSPROSIUM ALLOYS
IRON ALLOYS
MAGNETIC PROPERTIES
MAGNETIZATION
MAGNETOSTRICTION
MANGANESE ALLOYS
PHYSICAL PROPERTIES
QUATERNARY ALLOY SYSTEMS
RARE EARTH ALLOYS
TEMPERATURE DEPENDENCE
TERBIUM ALLOYS