Influence of Nitrogen Atmosphere Annealing on Structural and Transport Properties of Fe_1.125Te

Abstract:

Fe_1.125Te alloys had been synthesized by solid state reaction methods. The effects of nitrogen annealing on Fe_1.125Te lattice structure and physical properties had been studied. It was found that the lattice constants a and c increased after annealed at temperature 400~600 oC. When the temperature is above 850 oC, the size of the unit cell returns to the similar size of original samples. The step-like magnetic-thermal curves were observed after annealed at 900 oC, which is associated with two magnetic transitions. In vacuum, the transition temperatures are 122 K and 128 K, while in the nitrogen, they are 122 K and 138 K. The resistance-temperature curves indicate a semiconductor to metal transition around 69 K for N₂ atmosphere.

• Periodical: Advanced Materials Research (Volume 936)
• Pages: 1234-1238
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.936.1234
• Online since: June 2014
• Authors: Yu Jiang Li, Zhen Ping Wu, Yue Hua An, Guo Feng Wang, Chang Long Sun, Yao Ting Huang, Pei Gang Li, Ling Hong Li, Wei Hua Tang*
• Keywords: Alloy, Magnetic Property, Superconducting

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