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arXiv 1111.1782cond-mat.str-el
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SrMn3P4O14中自旋5/2阻挫三聚链的螺旋磁结构

Spiral magnetic structure in spin-5/2 frustrated trimerized chains in SrMn3P4O14

Masashi Hase, Vladimir Yu. Pomjakushin, Lukas Keller, Andreas Dönni, Osamu Sakai, Tao Yang, Rihong Cong, Jianhua Lin, Kiyoshi Ozawa, Hideaki Kitazawa

摘要:

利用中子粉末衍射实验研究了自旋为5/2的反铁磁三聚链状物质SrMn_3 P_4 O_(14)。在T_N_1 = 2.2(1)K以下出现共面螺旋磁结构。在T_N_2 = 1.75(5)K时,几个磁结构参数的值迅速变化,表明另一个相变,尽管T_N_2以上和以下的磁结构在性质上是相同的。螺旋磁结构可以用三聚链中最近邻和次最近邻交换相互作用之间的阻挫来解释。

英文摘要:

We study a spin-5/2 antiferromagnetic trimerized chain substance SrMn3P4O14 using neutron powder diffraction experiments. The coplanar spiral magnetic structure appears below T_N1 = 2.2(1) K. Values of several magnetic structure parameters change rapidly at T_N2 = 1.75(5) K, indicating another phase transition, although the magnetic structures above and below T_N2 are the qualitatively same. The spiral magnetic structure can be explained by frustration between nearest-neighbor and next-nearest-neighbor exchange interactions in the trimerized chains.

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