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Antiferromagnetic Ordering at Room Temperature in Co-Doped Sb2Te3 Topological Insulators

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Abstract

Structural and magnetic properties of Co-doped Sb2Te3 topological insulators have been investigated. Surface morphology was studied using scanning electron microscope (SEM) and atomic force microscope (AFM). X-ray photo electron spectroscopy (XPS) study reveals the mixed states of Co in Co2+ and Co3+. Magnetic study indicates that the substitution of Co in Sb2Te3 not only tune the materials from diamagnetic to antiferromagnetic (even at room temperature) but also propose a promising materials for antiferromagnetic TI which may be useful even for room temperature applications.

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Acknowledgements

The authors are grateful to CIFC, IIT(BHU) for providing facility for XRD, EDX, SEM, AFM, and magnetic measurements.

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  1. Department of Physics, Indian Institute of Technology, Banaras Hindu University, Varanasi, 221005, India

    Abhishek Singh, A. K. Ghosh & Sandip Chatterjee

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  1. Abhishek Singh
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  2. A. K. Ghosh
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  3. Sandip Chatterjee
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Correspondence to Sandip Chatterjee.

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Singh, A., Ghosh, A.K. & Chatterjee, S. Antiferromagnetic Ordering at Room Temperature in Co-Doped Sb2Te3 Topological Insulators. J Supercond Nov Magn 31, 299–305 (2018). https://doi.org/10.1007/s10948-017-4462-1

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  • DOI: https://doi.org/10.1007/s10948-017-4462-1

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