Heat Capacity and Mössbauer Study of Self-Flux Grown FeTe Single Crystal
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We report mainly the heat capacity and Mössbauer study of self-flux grown FeTe single crystal, which is a ground state compound of the Fe chalcogenides superconducting series i.e. FeTe1−x(Se/S) x The as grown FeTe single crystal is large enough to the tune of a few centimetres and the same crystallizes in tetragonal structure having space group of P4/nmm. FeTe shows the structural/magnetic phase transition at 70 K in both magnetic and resistivity measurements. Heat capacity measurement also confirms the coupled structural/magnetic transition at the same temperature. The Debye model fitting of low temperature (below 70 K) heat capacity exhibited Debye temperature (𝜃 D ) to be 324 K. Mössbauer spectra are performed at 300 and 5 K. The 300-K spectra showed two paramagnetic doublets and the 5-K spectra exhibited hyperfine magnetic sextet with an average hyperfine field of 10.6 Tesla matching with the results of Yoshikazu Mizuguchi et al.
KeywordsIron-based superconductors FeTe crystal growth Heat capacity Mössbauer spectroscopy
Authors would like to thank the director of NPL-CSIR India for his intense interest in the present work.
- 20.Zhang, S.B., Sun, Y.P., Zhu, X.D., Zhu, X.B., Wang, B.S., Li, G., Lei, H.C., Luo, X., Yang, Z.R., Song, W.H., Dai, J.M.: Supercond. Sci. Technol. 22, 050020 (2009)Google Scholar