Abstract
Unusual behavior of reentrant spin-glass (RSG) compound has been investigated by magnetometry and neutron diffraction. The system possesses a ferromagnetic (FM) ordering below 40 K and undergoes a RSG transition at 20 K. Additionally, retains memory effect above the glassy transition till spins sustain ordering. A novel critical behavior with unusual critical exponents ( and ) is observed that indicates a canting in the spin structure below the ferromagnetic transition (). A comprehensive analysis of temperature-dependent neutron diffraction data and first-principles calculations divulge that a structural distortion induced by an octahedral tilting results in a canted spin structure below .
- Received 26 January 2015
- Revised 10 May 2015
DOI:https://doi.org/10.1103/PhysRevB.91.224420
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