Title :
Structure and magnetic properties of Nd2(Fe1-xCox)14B1-y Cy alloys
Author :
Sun, X.K. ; Kou, X.C. ; Chuang, Y.C. ; Grossinger, R. ; Kirchmayr, H.R.
Author_Institution :
Inst. of Metal Res., Acad. Sinica, Shenyang, China
fDate :
9/1/1989 12:00:00 AM
Abstract :
The reorientation temperature and magnetocrystalline anisotropy field (Ha) of Nd2(Fe1-xCox)14B1-y Cy in the temperature range 200-450 K were determined by AC initial susceptibility measurements and the singular point detection technique, respectively. The temperature dependence of saturation magnetization was measured on finely powdered polycrystalline samples in an extraction magnetometer in fields up to 80 kOe. It was found that the Nd2(Fe1-xCox)14 C (X⩽0.4) series consisted of a mixture of two phases, Nd2(Fe,Co)17Cx and α-(Fe,Co), irrespective of heat treatment schedules. Partial substitution of C for boron led to a slight increase of Ha, whereas substitution of Co for Fe (at low Co concentration) causes an increase of Ha at low temperature. Although the concentration dependence of Ms is reminiscent of the Slater-Pauling curve, no maximum was found at either 1.5 K or 300 K, as one would expect in Fe-Co and Nd2(Fe,Co)14B alloys
Keywords :
Curie temperature; boron alloys; cobalt alloys; crystal atomic structure of alloys; ferromagnetic properties of substances; iron alloys; magnetic anisotropy; magnetisation; neodymium alloys; spin dynamics; 1.5 K; 200 to 450 K; AC initial susceptibility measurements; Nd2(Fe1-xCox)14B 1-yCy alloys; extraction magnetometer; finely powdered polycrystalline samples; magnetic properties; magnetocrystalline anisotropy field; reorientation temperature; saturation magnetization; singular point detection technique; temperature dependence; Anisotropic magnetoresistance; Iron; Magnetic anisotropy; Magnetic field measurement; Magnetic properties; Magnetic susceptibility; Neodymium; Perpendicular magnetic anisotropy; Saturation magnetization; Temperature distribution;
Journal_Title :
Magnetics, IEEE Transactions on
