Maheshwari, P. K. and Jha, Rajveer and Gahtori, Bhasker and Awana, V. P. S. (2015) Structural and Magnetic Properties of Flux-Free Large FeTe Single Crystal. Journal of Superconductivity and Novel Magnetism, 28 (10). 2893 -2897. ISSN 1557-1939

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We report synthesis of non-superconducting parent compound of iron chalcogenide, i.e., FeTe single crystal by self-flux method. The FeTe single crystal is crystallized in a tetragonal structure with the P4/nmm space group. The detailed scanning electron microscopy (SEM) results showed that the crystals are formed in slab-like morphology and are near (slight deficiency of Te) stoichiometric with homogenous distribution of Fe and Te. The coupled structural and magnetic phase transition is seen at around 70 K in both electrical resistivity and magnetization measurements, which is hysteric (Delta T = 5 K) in nature with cooling and warming cycles. Magnetic susceptibility (chi-T) measurements showed the magnetic transition to be of antiferromagnetic in nature, which is substantiated by isothermal magnetization (M-H) plots as well. The temperature-dependent electrical resistivity measured in 10-kOe field in both in-plane and out-of-plane field directions showed that the hysteric width nearly becomes double to Delta T = 10 K and is maximum for the out-of-plane field direction for the studied FeTe single crystal. We also obtained a sharp spike-like peak in heat capacity C (p) (T) measurement due to the coupled structural and magnetic order phase transitions.

Item Type: Article
Uncontrolled Keywords: Iron-based superconductors FeTe crystal growth Electrical and magnetic characterization
Subjects: Applied Physics/Condensed Matter
Depositing User: Dr. Rajpal Walke
Date Deposited: 13 Oct 2016 07:39
Last Modified: 13 Oct 2016 07:39

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