Magnetic Properties of Lu2Co17-xSix Single Crystals

نویسندگان

  • E. A. Tereshina
  • A. V. Andreev
چکیده

Abstract. Magnetic properties of Lu2Co17-xSix single crystals grown by the Czochralski method were investigated. The homogeneity range of Si substitution for Co extends up to x = 3.4. The unit cell volume, V, Curie temperature, TC, and spontaneous magnetic moment, Ms, decrease monotonously with increasing Si content. Upon Si substitution, the spin-reorientation transition occurring in Lu2Co17 as two second-order phase transitions, the “plane-cone” at TSR1 = 680 K and the “cone-axis” at TSR2 = 730 K, shifts toward the lower temperatures in Lu2Co16Si (TSR1 = 75 K, TSR2 = 130 K) and disappears for compounds with a higher Si content. The substitution of Si for Co results in a change of the type of magnetic anisotropy from easy plane to easy axis in Lu2Co17-xSix compounds with x > 1.

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تاریخ انتشار 2007