Journal
IEEE TRANSACTIONS ON MAGNETICS
Volume 55, Issue 2, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMAG.2018.2866430
Keywords
Adiabatic temperature changes; Heusler alloys; kinetic effects; magnetostructural transition (MST)
Funding
- Office of Basic Energy Sciences, Material Science Division of the U.S. Department of Energy [DE-FG02-06ER46291, DE-FG02-13ER46946]
- Institute of Low Temperature and Structural Research PAS, Wroclaw, Poland through the ERA. Net RUS Plus initiative of the EU 7th Framework Program under Project 146-MAGNES
- National Science Center, Krakow, Poland, through the Program SONATA [2016/21/D/ST3/03435]
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The adiabatic temperature change (Delta T-ad) in Ni45Mn43CoSn11 has been measured by a direct method in magnetic field changes up to 14 T. Large reversible magnetocaloric effects resulting in Delta T-ad of about = -11 and 5 K have been observed for magnetic field changes of 14 T at the magnetostructural (T-A similar to 260 K) and magnetic transitions (T-C similar to 320 K), respectively. The impact of the thermomagnetic history on Delta T-ad at high magnetic fields has been reported. The significant observed changes in the relaxation time of Delta T-ad, depending on the type of the phase transitions, magnetization, and demagnetization cycle are discussed.
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