Temperature dependence of the coercive force in Nd sub 4 Fe sub 77 B sub 19

Journal Article · Sat Sep 01 04:00:00 EDT 1990 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (USA)

DOI:https://doi.org/10.1109/20.104541· OSTI ID:5995072

Eckert, D; Muller, K H; Handstein, A; Schneider, J ^[1]; Grossinger, R; Krewenka, R ^[2]

---

1. Zentralinstitut fur Festkorperphysik und Werkstofforschung der AdW der DDR, Postfach, 8027 Dresden (DE)
2. Inst. fur Experimentalphysik, Technische Univ. Wien, A-1040 Wien (AU)

The temperature dependence of coercivity {sub J}H{sub c} of Fe{sub 3}B-based Nd{sub 4}Fe{sub 77}B{sub 19} permanent magnetic materials is analysed. The coercivity of these melt-spun materials vanishes above the Curie temperature of the minor phase Nd{sub 2}Fe{sub 14}B. As well as melt-spun Nd-rich magnets, Nd{sub 4}Fe{sub 77}B{sub 19} magnets show a maximum in the {sub J}H{sub c} versus T curve at low temperatures. The coercivity of these melt-spun materials has a smaller temperature coefficient than sintered Nd-rich NdFeB magnets. The relation of the observed T- dependence of {sub J}H{sub c}, to the anisotropy field H{sub A}(T) of Nd{sub 2}Fe{sub 14}B is discussed.

• OSTI ID: 5995072
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (USA), Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (USA) Vol. 26:5; ISSN IEMGA; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ANISOTROPY
BORIDES
BORON COMPOUNDS
COERCIVE FORCE
IRON BORIDES
IRON COMPOUNDS
MAGNETIC PROPERTIES
MAGNETS
MATERIALS TESTING
NEODYMIUM BORIDES
NEODYMIUM COMPOUNDS
PERMANENT MAGNETS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
TEMPERATURE DEPENDENCE
TESTING
TRANSITION ELEMENT COMPOUNDS