K0.64 Fe 1.44 Se 2的输运和磁性各向异性
Anisotropy in transport and magnetic properties of K0.64Fe1.44Se2
摘要:
我们报道了单晶的输运和磁性的各向异性的研究。K0.64Fe1.44Se2.00电阻率的各向异性在1.8 ~ 300 K之间达一个数量级。磁化率在正常状态下表现出弱的温度依赖性,随着温度的降低,没有明显的异常。K0.64Fe1.44Se2.00的较低临界场Hc 1仅约为3 Oe,并且Hc 1,c/Hc 1,ab的各向异性约为1。H的临界电流||ab和H|| c约为10-10^3 A/cm 2,小于铁磷属元素化物和FeTe_{1-x} Se_{x},且几乎各向同性。
英文摘要:
We report a study of anisotropy in transport and magnetic properties of K0.64Fe1.44Se2.00 single crystals. The anisotropy in resistivity is up to one order of magnitude between 1.8 K and 300 K. Magnetic susceptibility exhibits weak temperature dependence in the normal state with decrease in temperature with no significant anomalies. The lower critical fields Hc1 of K0.64Fe1.44Se2.00 are only about 3 Oe and the anisotropy of Hc1,c/Hc1,ab is about 1. The critical currents for H||ab and H||c are about 10-10^3 A/cm2, smaller than in iron pnictides and in FeTe_{1-x}Se_{x} and nearly isotropic.
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