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Title: Enhanced magnetocaloric effects in metastable phases of Mn1-xCoxNiGe generated through thermal quenching and high-pressure annealing

Abstract

Metastable phases were formed in Mn1-xCoxNiGe (x = 0.05 and 0.08) by annealing at 800 °C followed by rapid cooling, i.e., quenching, at ambient pressure (P = 0) and under a pressure of P = 3.5 GPa, and their phase transitions and associated magnetocaloric properties were investigated. The crystal cell volumes of the metastable phases decreased, and their structural transitions significantly shifted to lower temperatures relative to those of the slow-cooled compounds, with a greater reduction observed in the samples where the rapid cooling occurred under high pressures. The magnetic and structural transitions coupled to form a magnetostructural transition in the metastable phases, resulting in large magnetic entropy changes up to -79.6 J kg-1 K-1 (x = 0.08 ) for a 7-T field change. As a result, the experimental results demonstrate thermal quenching and high-pressure annealing as alternative methods to create magnetostructural transitions, without modifying the compositions of the materials.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [1]
  1. Louisiana State University, Baton Rouge, LA (United States)
  2. Southern Illinois University, Carbondale, IL (United States)
Publication Date:
Research Org.:
Louisiana State Univ., Baton Rouge, LA (United States); Southern Illinois Univ., Carbondale, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1975220
Alternate Identifier(s):
OSTI ID: 1923820
Grant/Contract Number:  
FG02-13ER46946; SC0010521
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 133; Journal Issue: 6; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; magnetocaloric; barocaloric; magnetic refrigeration; phase transitions; crystallography; magnetism; high pressure instruments; annealing

Citation Formats

Chhetri, Tej Poudel, Chen, Jing-Han, Grant, Anthony T., Young, David P., Dubenko, Igor, Talapatra, Saikat, Ali, Naushad, and Stadler, Shane. Enhanced magnetocaloric effects in metastable phases of Mn1-xCoxNiGe generated through thermal quenching and high-pressure annealing. United States: N. p., 2023. Web. doi:10.1063/5.0129401.
Chhetri, Tej Poudel, Chen, Jing-Han, Grant, Anthony T., Young, David P., Dubenko, Igor, Talapatra, Saikat, Ali, Naushad, & Stadler, Shane. Enhanced magnetocaloric effects in metastable phases of Mn1-xCoxNiGe generated through thermal quenching and high-pressure annealing. United States. https://doi.org/10.1063/5.0129401
Chhetri, Tej Poudel, Chen, Jing-Han, Grant, Anthony T., Young, David P., Dubenko, Igor, Talapatra, Saikat, Ali, Naushad, and Stadler, Shane. Wed . "Enhanced magnetocaloric effects in metastable phases of Mn1-xCoxNiGe generated through thermal quenching and high-pressure annealing". United States. https://doi.org/10.1063/5.0129401. https://www.osti.gov/servlets/purl/1975220.
@article{osti_1975220,
title = {Enhanced magnetocaloric effects in metastable phases of Mn1-xCoxNiGe generated through thermal quenching and high-pressure annealing},
author = {Chhetri, Tej Poudel and Chen, Jing-Han and Grant, Anthony T. and Young, David P. and Dubenko, Igor and Talapatra, Saikat and Ali, Naushad and Stadler, Shane},
abstractNote = {Metastable phases were formed in Mn1-xCoxNiGe (x = 0.05 and 0.08) by annealing at 800 °C followed by rapid cooling, i.e., quenching, at ambient pressure (P = 0) and under a pressure of P = 3.5 GPa, and their phase transitions and associated magnetocaloric properties were investigated. The crystal cell volumes of the metastable phases decreased, and their structural transitions significantly shifted to lower temperatures relative to those of the slow-cooled compounds, with a greater reduction observed in the samples where the rapid cooling occurred under high pressures. The magnetic and structural transitions coupled to form a magnetostructural transition in the metastable phases, resulting in large magnetic entropy changes up to -79.6 J kg-1 K-1 (x = 0.08 ) for a 7-T field change. As a result, the experimental results demonstrate thermal quenching and high-pressure annealing as alternative methods to create magnetostructural transitions, without modifying the compositions of the materials.},
doi = {10.1063/5.0129401},
journal = {Journal of Applied Physics},
number = 6,
volume = 133,
place = {United States},
year = {Wed Feb 08 00:00:00 EST 2023},
month = {Wed Feb 08 00:00:00 EST 2023}
}

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