Thermal fluctuation field in Re-Tm-B permanent magnet materials

Journal Article · Sat Sep 01 00:00:00 EDT 1990 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (USA)

DOI:https://doi.org/10.1109/20.104825· OSTI ID:5777186

Liu, J F; Luo, H L ^[1]; Pan, S M ^[2]; Hou, D L; Nie, X F ^[3]

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1. Academia Sinica, Beijing, BJ (China). Inst. of Physics
2. General Research Inst. of Non-Ferrous Metals, Beijing (CN)
3. Dept. of Physics, Hebei Normal Univ., Shijiazhuang City, Hebei Province (CN)

Measurements of temperature dependence of the coercive field (H{sub c}) are reported for Nd-Fe-B sintered magnets. The relationship between l{sub g}H{sub c} and 1{sub g}H{sub f} was deduced from the Gaunt's Localized weak pinning model, which can be written as the following form, 1{sub g}H{sub c} = 1{sub g}H{sub f}+1{sub g}25 (31{gamma}b{sup 2}/25kT {minus} 1), where {gamma} is the domain wall energy, b is the range of interaction between domain wall and pin. The values of 1{sub g}H{sub c} were calculated using the above equation, which are in good agreement with the experiments.

• OSTI ID: 5777186
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (USA), Vol. 26:5; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRON BORIDES
MAGNETIC PROPERTIES
NEODYMIUM BORIDES
PERMANENT MAGNETS
CHEMICAL COMPOSITION
COERCIVE FORCE
DISLOCATION PINNING
DOMAIN STRUCTURE
MAGNETIC FIELDS
SINTERING
TEMPERATURE DEPENDENCE
BORIDES
BORON COMPOUNDS
FABRICATION
IRON COMPOUNDS
MAGNETS
NEODYMIUM COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
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