No abstract

Magnetic properties of anisotropic and isotropic SmCo 5 /a-Fe nanocomposite magnets with a layered structure were computer-simulated with varying the stacking period, the a-Fe fraction, and temperature. The (BH) max values of approximately 800 and 700 kJ/m 3 were achieved for anisotropic magnets at 300 and 473 K, respectively. These values roughly agree with results for SmCo 5 /a-Fe with a core-shell structure, and the value at 473 K is much higher than that of Nd 2 Fe 14 B/a-Fe with a layered structure. For isotropic magnets, the largest H c values were obtained for the stacking periods of approximately 20 and 25 nm at 300 and 473 K, respectively. The achieved (BH) max values were approximately 300 and 250 kJ/m 3 at 300 and 473 K, respectively. The behavior of H c was discussed in terms of the ratio of exchange energy to magnetic anisotropy one. V C 2014 AIP Publishing LLC.