Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFe2Se3
Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFe2Se3
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DOI：
10.1103/physrevb.85.064413
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发表时间：
2012-02-22
影响因子：
3.7
通讯作者：
Sato, Taku J.
中科院分区：
文献类型：
--
作者：
Nambu, Yusuke;Ohgushi, Kenya;Sato, Taku J.
通过磁化率、比热、电阻率和中子衍射测量来检测绝缘BaFe2Se3的磁性。在形成近程磁相关后，在T-N以下观察到类似于255k的远程有序。这种转变被体积性质所掩盖。磁矩（平行于a）排列形成一个Fe-4铁磁单元，每个Fe-4堆叠成反铁磁。这种块磁性是含铁材料磁性结构中的第三类。磁有序通过磁弹性耦合驱动异常大的畸变。
Magnetism in the insulating BaFe2Se3 was examined through susceptibility, specific heat, resistivity, and neutron diffraction measurements. After formation of a short-range magnetic correlation, a long-range ordering was observed below T-N similar to 255 K. The transition is obscured by bulk properties. Magnetic moments (parallel to a) are arranged to form a Fe-4 ferromagnetic unit, and each Fe-4 stacks antiferromagnetically. This block magnetism is of the third type among magnetic structures of ferrous materials. The magnetic ordering drives unusually large distortion via magnetoelastic coupling.