Mossbauer Spectroscopy of Triphylite (LiFePO4) at Low Temperatures

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Mossbauer Spectroscopy of Triphylite (LiFePO4) at Low Temperatures ( mossbauer-spectroscopy-triphylite-lifepo4-at-low-temperature )

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Condens. Matter 2019, 4, 86 6 of 15 Figure 3. Temperature dependences of the σZFC (zero field cooled—open circles), σFC (field cooled—solid circles) magnetization and inverse molar susceptibility χ−1 (open triangles) of the LiFePO sample at the magnetic field 1 T. The magnetization curves of the LiFePO4 sample were measured at temperatures 4.2 K and 60 K and are presented in Figure 4. A linear dependence of the magnetic moment on the magnetic field typical for an AF material was observed at the liquid helium temperature. A larger value of the magnetic moment at 60 K is due to the transition from the AF to the paramagnetic state, which is clearly seen in the temperature dependence of the magnetization in a field of 1 T (Figure 3). We can state that the AF character of the magnetic order in the studied LiFePO4 sample is confirmed by the magnetic measurements discussed above, and we can take it into account in the subsequent analysis of the Mössbauer spectra. Figure 4. The magnetization curves of the LiFePO4 sample measured at temperatures 4.2 K and 60 K. m4

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