Structure &amp; magnetic properties of Cr/SmCo<sub>5</sub>/Pt/CoFeB multilayer thin films

ORAL

Abstract

The structural and magnetic properties of exchange spring magnetic Cr/SmCo5/Pt/CoFeB multilayer thin films deposited by ion beam sputtering have been explored. X-ray reflectivity analysis reveals the sharp layered structure of multilayers with total film thickness of ~ 350 Å and both surface and interface roughness less than 10 Å. Grazing incident X-ray diffraction pattern affirmed the very fine nano-sized crystallites embedded in majority amorphous matrix. Atomic force microscopy micrograph shows dense microstructure with 7 Å surface roughness of a film. Vibrating sample magnetometer study revealed the in-plane magnetic anisotropy in all investigated samples. In-plane coercivity is very low and normalized remanence is ~ 1. Out-of-plane coercivity is more than one order higher than that of in-plane and negligible remanence due to in-plane anisotropy. Longitudinal magneto-optical Kerr effect study shows in-plane uniaxial magnetic anisotropy. This magnetic multilayer system with uniaxial in-plane magnetic anisotropy is useful for magnetic device applications.

*Sambhunath Bera would like to acknowledge financial support by the SERB, India through project number CRG/2021/002407 and BML Munjal University for providing seed grant with no BMU/SG/SOET/AS/2022-001. 

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Presenters

  • Sambhunath Bera

    • School of Engineering & Technology, BML Munjal University, Sidhrawali, Gurugram, Haryana, 122413, India

Authors

  • Sambhunath Bera

    • School of Engineering & Technology, BML Munjal University, Sidhrawali, Gurugram, Haryana, 122413, India

  • Gourav Sharma

    • School of Engineering & Technology, BML Munjal University, Sidhrawali, Gurugram, Haryana, 122413, India

  • Aaqib A Shah

    • School of Engineering & Technology, BML Munjal University, Sidhrawali, Gurugram, Haryana, 122413, India

  • Harsh Vardhan

    • Amity Institute of Applied Sciences, Amity University UP, Sector-125, Noida 201313, India

  • Shubham Kumar

    • Amity Institute of Applied Sciences, Amity University UP, Sector-125, Noida 201313, India

  • Vishnu Kumar

    • School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, Karnataka 560064, India

  • Ananya Chattaraj

    • School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, Karnataka 560064, India

  • Nobuaki Ito

    • Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan

  • Yukiko Yamada-Takamura

    • Japan Adv Inst of Sci and Tech
    • Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan