Spiral magnetic structure in spin-5/2 frustrated trimerized chains in SrMn3P4O14
Abstract
We study a spin-5/2 antiferromagnetic trimerized chain substance SrMn3P4O14 using neutron powder diffraction experiments. The coplanar spiral magnetic structure appears below TN1 = 2.2(1) K. Values of several magnetic structure parameters change rapidly at TN2 = 1.75(5) K, indicating another phase transition, although the magnetic structures above and below TN2 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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