YBaCuFeO的中子粉末衍射研究（温度范围=4.2 - 300 K）及极化分析
Neutron powder diffraction study (= 4.2-300 K) and polarization analysis of YBaCuFeO.
作者信息
Mombrú A W, Prassides K, Christides C, Erwin R, Pissas M, Mitros C, Niarchos D
机构信息
Laboratorio de Cristalografía, Cátedra de Física, Facultad de Química, PO Box 1157, CP 11800, Montevideo, Uruguay.
School of Chemistry, Physics and Environmental Science, University of Sussex, Brighton BN1 9QJ, UK.
出版信息
J Phys Condens Matter. 1998 Feb 16;10(6). doi: 10.1088/0953-8984/10/6/008.
The crystal and magnetic structures of the perovskite YBaCuFeOhave been studied in the temperature range = 4.2-300 K by powder neutron diffraction. In addition to the antiferromagnetic ordering transition at = 442 K, a commensurate-incommensurate magnetic transition is detected at' = 190 K. Below this temperature, two sets of satellite peaks surround the (1/2,1/2,1/2) magnetic peak at ∼ Å, collapsing into a single set of satellites below 155 K. Polarization analysis has been performed to confirm the magnetic nature of the (1/2,1/2,1/2)satellites.
通过粉末中子衍射研究了钙钛矿YBaCuFeO在4.2 - 300 K温度范围内的晶体结构和磁性结构。除了在442 K时的反铁磁有序转变外，在190 K时还检测到一个相称 - 不相称的磁性转变。低于该温度时，两组卫星峰围绕在约Å处的(1/2,1/2,1/2)磁峰，在155 K以下合并为一组卫星峰。已经进行了极化分析以确认(1/2,1/2,1/2)卫星峰的磁性本质。
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