Title :
Temperature dependence of the coercive force in Nd4Fe 77B19
Author :
Eckert, D. ; MÜller, E.H. ; Handstein, A. ; Schneider, Jurgen ; Grössinger, R. ; Krewenka, R.
Author_Institution :
Zentralinst. fuer Festkorperphys. und Werkstofforschung, Dresden, East Germany
fDate :
9/1/1990 12:00:00 AM
Abstract :
The temperature dependence of the coercivity JHc of Fe3B-based Nd4 Fe77B19 permanent magnetic materials is analyzed. The coercivity of these melt-spun materials vanishes above the Curie temperature of the minor phase Nd2Fe14B. Nd 4Fe77B19 magnets also show a maximum in the JHc versus T curve at low temperatures. The coercivity of these melt-spun materials has a smaller temperature coefficient than that of sintered Nd-rich NdFeB magnets. The relation of the observed T-dependence of JHc to the anisotropy field of Nd2Fe14B is discussed
Keywords :
Curie temperature; boron alloys; coercive force; iron alloys; magnetic anisotropy; neodymium alloys; Curie temperature; Nd4Fe77B19; anisotropy field; coercivity; melt-spun materials; minor phase; permanent magnetic materials; temperature coefficient; Amorphous magnetic materials; Annealing; Coercive force; Iron; Magnetic anisotropy; Magnetic materials; Magnets; Neodymium; Perpendicular magnetic anisotropy; Temperature dependence;
Journal_Title :
Magnetics, IEEE Transactions on
