Magnetic torque of λ-(BETS)2FeCl4
Magnetic torque of λ-(BETS)2FeCl4
复制标题
λ-(BETS)2FeCl4 的磁矩
DOI：
10.1016/s0379-6779(00)00775-x
复制
发表时间：
2001
期刊：
影响因子：
4.4
通讯作者：
N. Toyota
中科院分区：
文献类型：
--
作者：
Takahiko Sasaki;H. Uozaki;S. Endo;N. Toyota
测量了λ-（BETS）2FeCl 4在15 T和0.4K下的磁矩.在约1.2T和低于9.5K的磁场中观察到反铁磁相（AF）和斜反铁磁相（CAF）之间清晰的一级自旋翻转转变。发现AF易轴在从c轴向B* 轴倾斜约30 °的方向上，这与先前关于易轴（c轴）的报道不同。在CAF和场致铁磁（F）（顺磁）相之间具有H= 10 T左右的磁滞的阶梯状转变处，易磁化轴的方向改变。在耦合的双自旋体系Fe 3+（S= 5/2）和（BETS）2（S= 1/2）的基础上，考虑了H-T相图上的两个跃迁。
Magnetic torque of λ-(BETS) 2 FeCl 4 is measured up to 15 T and down to 0.4 K. Clear first-order spin flop transition between the antiferromagnetic (AF) and the canted antiferromagnetic (CAF) phases is observed in the magnetic field of about 1.2 T and below 9.5 K. The AF easy axis is found to be in the direction tilted by about 30 from the c-axis to the b*-axis, which is different from the previous reports on the easy axis (the c-axis). At the step-like transition with hysteresis around H= 10 T between CAF and the field induced ferromagnetic (F)(paramagnetic) phases, the direction of the magnetic easy axis changes. The two transitions on the H-T phase diagram are considered on the basis of the coupled two spin system; Fe 3+(S= 5/2) and (BETS) 2 (S= 1/2).