Magnetic and magnetocaloric properties of Co doped Ni-Mn-Sn Heusler alloys at high magnetic field and pressure

ORAL

Abstract

The magnetic and magnetocaloric properties of Ni45Mn43CoSn11 have been investigated using direct method for magnetic field changes up to 14 T, heat capacity measurements, and magnetization with hydrostatic pressure applications. A large reversible magnetocaloric effect resulted in a ΔTad of about =−11 K and 5 K for a magnetic field change of 14 T in the vicinity of magnetostructural (TA~260 K) and magnetic (TC~320K) transition, respectively. The impact of thermomagnetic history on ΔTad at high magnetic fields has been revealed. Significant changes in the relaxation time of ΔTad depending on the type of phase transitions, magnetization, and demagnetization cycle are discussed. The density of states and Debye temperature have been estimated from heat capacity measurements. The mixed effects of pressure and magnetic field on the transition temperature is discussed.

*This work was supported by the Office of Basic Energy Sciences, Material Science Division of the U.S. Department of Energy, DOE Grant No. DE-FG02-06ER46291 (SIU) and DE-FG02-13ER46946 (LSU). YK acknowledges support from a grant from the National Science Center Poland (NCN) under the SONATA program (2016/21/D/ST3/03435).

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Presenters

  • Sudip Pandey

    • Department of Physics, Southern Illinois University Carbondale, IL 62901 USA
    • Department of Physics, Southern Illinois University Carbondale, IL 62901, USA

Authors

  • Sudip Pandey

    • Department of Physics, Southern Illinois University Carbondale, IL 62901 USA
    • Department of Physics, Southern Illinois University Carbondale, IL 62901, USA

  • Yury Koshkid’ko

    • Institute of Low Temperature and Structural Research PAS, Wroclaw, 53-421 Poland

  • Igor Dubenko

    • Department of Physics, Southern Illinois University Carbondale, IL 62901 USA
    • Department of Physics, Southern Illinois University Carbondale, IL 62901, USA

  • Anil Aryal

    • Department of Physics, Southern Illinois University Carbondale, IL 62901 USA
    • Department of Physics, Southern Illinois University Carbondale, IL 62901, USA

  • Alexander B. Granovsky

    • Moscow State University
    • Faculty of Physics, Lomonosov Moscow State University, Moscow, 119991 Russia

  • Shane Stadler

    • Department of Physics & Astronomy, Louisiana State University, LA 70803 USA

  • NAUSHAD ALI

    • Department of Physics, Southern Illinois University Carbondale, IL 62901 USA
    • Department of Physics, Southern Illinois University Carbondale, IL 62901, USA