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Magnetic Property of CoTbNi Ternary Alloy Thin Films

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Abstract

The structure and magnetic property of as prepared and post-annealed thin films of CoTbNi ternary alloy have been investigated. (Co0.85Tb0.15)1-xNix alloy thin films with x = (0.54, 0.63, 0.72, 0.81) were grown on Si-substrate by co-sputtering of Ni element and Co0.85Tb0.15 alloy using dc magnetron sputtering. These films have been crystallized in amorphous form, as confirmed by X-ray diffraction (XRD) measurement. The magnetization versus field measurements shows that these films exhibit room temperature ferromagnetism. The magnetic properties of these alloy films have a strong dependency on the Ni concentrations. It is observed that the saturation magnetization and coercivity of these alloy thin films decreases with increase of Ni content of the films. One of the striking features was the observation of perpendicular magnetic anisotropy (PMA) for x = 0.63 and 0.72 thin films. However, the observed PMA disappears upon post-annealing of the films. The M-T measurement shows that the ferromagnetic transition temperatures of these materials are much higher than the room temperature.

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Acknowledgments

SKS acknowledges the financial support for a project through “Early Career Research Award” from DST-SERB India, with sanction order number (ECR/2016/000713).

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Authors and Affiliations

  1. Department of Physics, Bodoland University, Kokrajhar, 783370, India

    R. K. Basumatary, B. Brahma & R. Brahma

  2. Department of Physics, Indian Institute of Technology Guwahati, Guwahati, 781039, India

    Aakansha & S. Ravi

  3. Physical Science Division, Institute of Advanced Study in Science and Technology, Guwahati, 781035, India

    B. Basumatary

  4. Department of Physics, Central Institute of Technology Kokrajhar, Kokrajhar, 783370, India

    B. Brahma, R. Hussain & S. K. Srivastava

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  1. R. K. Basumatary
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  2. Aakansha
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Correspondence to S. K. Srivastava.

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Basumatary, R.K., Aakansha, Basumatary, B. et al. Magnetic Property of CoTbNi Ternary Alloy Thin Films. J Supercond Nov Magn 33, 3165–3170 (2020). https://doi.org/10.1007/s10948-020-05574-3

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