Spiral magnetic structure in spin-5/2 frustrated trimerized chains in SrMn3P4O14
Masashi Hase, Vladimir Yu. Pomjakushin, Lukas Keller, Andreas D\"onni,, Osamu Sakai, Tao Yang, Rihong Cong, Jianhua Lin, Kiyoshi Ozawa, Hideaki, Kitazawa
TL;DR
This study reveals a coplanar spiral magnetic structure in SrMn3P4O14 below 2.2 K, driven by frustration in a spin-5/2 trimerized chain, with a second phase transition at 1.75 K.
Contribution
First neutron diffraction analysis of SrMn3P4O14 showing spiral magnetic order caused by exchange frustration in spin-5/2 chains.
Findings
Spiral magnetic order appears below 2.2 K.
A second phase transition occurs at 1.75 K.
Magnetic structure parameters change rapidly at T_N2.
Abstract
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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