Magnetic anisotropy and spin reorientation in U2Co15Si2

作者：Tereshina E A^*; Andreev A V; Koyama K; Shiokawa Y; Satoh I; Watanabe K

来源：Journal of Magnetism and Magnetic Materials, 2007, 316(2): E515-E518.

DOI：10.1016/j.jmmm.2007.03.006

• R2Co17
• uranium compound
• magnetic anisotropy
• spin reorientation

Field and temperature dependencies of the magnetization measured along the principal axes of a U2Co15Si2 single crystal show that this compound is a ferromagnet with a spontaneous magnetic moment of 14.8 mu(B) per formula unit (at 4.2 K), located in the basal plane of the hexagonal crystal structure. A strong easy-plane magnetic anisotropy (K-1 = -0.97 MJ m(-3) at 4.2 K) is attributed to the U sublattice because Lu2Co15Si2 exhibits easy-axis anisotropy with K-1 = 0.42 MJ m(-3). The easy-plane anisotropy of U2Co15Si2 transforms to a cone of easy axes above 270 K. The magnetization vector approaches the c-axis at 350 K, and the compound has easy c-axis anisotropy up to the Curie temperature T-C = 601 K.

• 出版日期2007-9