Magnetic anisotropy in doped and undoped LiFePO4 single crystals

Chen, D. P.; Wang, X. L.; Hu, Y. S.; Lin, C. T.; Dou, S. X.; Nigam, R.

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Magnetic anisotropy in doped and undoped LiFePO₄ single crystals

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Chen, D. P.
Scientific Facility Crystal Growth (Masahiko Isobe), Max Planck Institute for Solid State Research, Max Planck Society;

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Hu, Y. S.
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Lin, C. T.
Scientific Facility Crystal Growth (Masahiko Isobe), Max Planck Institute for Solid State Research, Max Planck Society;

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Chen, D. P., Wang, X. L., Hu, Y. S., Lin, C. T., Dou, S. X., & Nigam, R. (2007). Magnetic anisotropy in doped and undoped LiFePO₄ single crystals. Journal of Applied Physics, 101(9): 09N512.

Cite as: https://hdl.handle.net/21.11116/0000-000E-B615-D

Abstract

We report on the magnetic anisotropic properties of pure and Mg doped LiFePO4 single crystals grown by the traveling solvent floating zone technique. Our results reveal a considerable anisotropy in the susceptibilities along H parallel to a, H parallel to b, and H parallel to c for both crystals. LiFePO4 and Li0.99Mg0.01FePO4 crystals show antiferromagnetic long-range ordering below the Neel temperature of about 52 K, with the b axis being the magnetic easy axis. The effective moments have been determined to be 6.18 mu(B) and 6.07 mu(B) for the pure and the doped crystals, respectively. These values are higher than what is expected on the basis of the spin-only value of 6.70 mu(B) with a high-spin d(6) configuration for the Fe2+ ion. (c) 2007 American Institute of Physics.