Ferromagnetism and spin reorientation in Sm12Fe14Al5
Journal of Magnetism and Magnetic Materials(2010)
Abstract
The single crystal of the new ternary compound Sm12Fe14Al5 was grown and its crystallographic and magnetic properties were investigated. Sm12Fe14Al5 has a hexagonal structure of the space group p-3m1 and shows ferromagnetism with a Curie temperature of 245K. The easy direction of magnetization is parallel to the c-axis at temperatures between 245 and 85K; however, it changes to the c-plane below 85K through a first-order-like phase transition. No saturation is observed in the magnetization curve even under the applied field of 55kOe at 5K. Sm12Fe14Al5 seems to have a large coercive field at very low temperatures. The anisotropy field was estimated at 5 and 120K and the saturation magnetization of low temperature phase is explained assuming a ferromagnetic coupling between Fe and Sm sublattices.
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Key words
Rare earth intermetallic,Magnetic anisotropy,Spin reorientation,Flux method,Single crystal
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