Strong crystalline field at the Fe site and spin rotation in olivine LiNi0.9957Fe0.01 PO4 material by Mössbauer spectroscopy

Woochul Kim; Chan Hyuk Rhee; Hyung Joon Kim; Seung Je Moon; Chul Sung Kim
June 2010
Applied Physics Letters;6/14/2010, Vol. 96 Issue 24, p242505
Academic Journal
The crystal structure of LiNi0.9957Fe0.01 PO4 compound has been determined to be orthorhombic by Rietveld refinement method. Temperature dependence of magnetization M shows an anomalous antiferromagnetic behavior. A sudden change in both the magnitude of magnetic hyperfine field and its slope below 11 K suggests that magnetic phase transition related to the spin ordering takes place abruptly. From the result of Mössbauer measurement, it is shown that a strong electric crystalline field of octahedral symmetry including the contribution of spin-orbit coupling and magnetic hyperfine field by space-modulated spin structure is acted to the sites of Fe2+ ions simultaneously at low temperature.


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