Controlling phase transitions in MnNiGe using thermal quenching and hydrostatic pressure

Jing Han Chen; Tej Poudel Chhetri; Anthony T. Grant; Xiaojian Bai; Qiang Zhang; Chung Kai Chang; David P. Young; Igor Dubenko; Saikat Talapatra; Naushad Ali; Shane Stadler

doi:10.1088/1361-6463/ad297f

Controlling phase transitions in MnNiGe using thermal quenching and hydrostatic pressure

Jing Han Chen, Tej Poudel Chhetri, Anthony T. Grant, Xiaojian Bai, Qiang Zhang, Chung Kai Chang, David P. Young, Igor Dubenko, Saikat Talapatra, Naushad Ali, Shane Stadler

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Abstract

The phase transitions in MnNiGe compounds were explored by manipulating the heat treatment conditions and through hydrostatic pressure application. As the quenching temperature increased, both the first-order martensitic structural transition temperatures and magnetic transition temperatures decreased relative to those in the slowly-cooled samples. When the samples were quenched from 1200 °C, the first-order martensitic structural transition temperature lowered by more than 200 K. The structural transitions also shifted to lower temperature with the application of hydrostatic pressure during measurement. Temperature-dependent x-ray diffraction results reveal that the changes of the cell parameters resulting from the structural transitions are nearly identical for all samples regardless of the extensive variation in their structural transition temperatures. In addition, neutron scattering measurements confirm the magnetic structure transition between simple and cycloidal spiral magnetic structures.

Original language	English
Article number	205003
Journal	Journal of Physics D: Applied Physics
Volume	57
Issue number	20
DOIs	https://doi.org/10.1088/1361-6463/ad297f
State	Published - May 17 2024

Funding

S Stadler and J-H Chen acknowledge support from the U.S. Department of Energy, Office of Basic Energy Sciences under Award No. DE-FG02-13ER46946. N Ali and I Dubenko acknowledge support from the U.S. Department of Energy, Office of Basic Energy Sciences under Award No. DE-FG02-06ER46291. D P Young acknowledges support from the U.S. National Science Foundation, Division of Materials Research under Award No. NSF-DMR-1904636. Xiaojian Bai is supported by the Louisiana Board of Regents Support Fund. The DSC data used in this work were collected at the Center for Advanced Microstructures and Devices (CAMD) under the supervision of A Roy. Neutron data were collected at the Spallation Neutron Source, a DOE Office of Science User Facility operated by Oak Ridge National Laboratory.

Keywords

high pressure magnetism
material design
phase transition

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10.1088/1361-6463/ad297f

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abstract = "The phase transitions in MnNiGe compounds were explored by manipulating the heat treatment conditions and through hydrostatic pressure application. As the quenching temperature increased, both the first-order martensitic structural transition temperatures and magnetic transition temperatures decreased relative to those in the slowly-cooled samples. When the samples were quenched from 1200 °C, the first-order martensitic structural transition temperature lowered by more than 200 K. The structural transitions also shifted to lower temperature with the application of hydrostatic pressure during measurement. Temperature-dependent x-ray diffraction results reveal that the changes of the cell parameters resulting from the structural transitions are nearly identical for all samples regardless of the extensive variation in their structural transition temperatures. In addition, neutron scattering measurements confirm the magnetic structure transition between simple and cycloidal spiral magnetic structures.",

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AU - Chen, Jing Han

AU - Chhetri, Tej Poudel

AU - Grant, Anthony T.

AU - Bai, Xiaojian

AU - Zhang, Qiang

AU - Chang, Chung Kai

AU - Young, David P.

AU - Dubenko, Igor

AU - Talapatra, Saikat

AU - Ali, Naushad

AU - Stadler, Shane

PY - 2024/5/17

Y1 - 2024/5/17

N2 - The phase transitions in MnNiGe compounds were explored by manipulating the heat treatment conditions and through hydrostatic pressure application. As the quenching temperature increased, both the first-order martensitic structural transition temperatures and magnetic transition temperatures decreased relative to those in the slowly-cooled samples. When the samples were quenched from 1200 °C, the first-order martensitic structural transition temperature lowered by more than 200 K. The structural transitions also shifted to lower temperature with the application of hydrostatic pressure during measurement. Temperature-dependent x-ray diffraction results reveal that the changes of the cell parameters resulting from the structural transitions are nearly identical for all samples regardless of the extensive variation in their structural transition temperatures. In addition, neutron scattering measurements confirm the magnetic structure transition between simple and cycloidal spiral magnetic structures.

AB - The phase transitions in MnNiGe compounds were explored by manipulating the heat treatment conditions and through hydrostatic pressure application. As the quenching temperature increased, both the first-order martensitic structural transition temperatures and magnetic transition temperatures decreased relative to those in the slowly-cooled samples. When the samples were quenched from 1200 °C, the first-order martensitic structural transition temperature lowered by more than 200 K. The structural transitions also shifted to lower temperature with the application of hydrostatic pressure during measurement. Temperature-dependent x-ray diffraction results reveal that the changes of the cell parameters resulting from the structural transitions are nearly identical for all samples regardless of the extensive variation in their structural transition temperatures. In addition, neutron scattering measurements confirm the magnetic structure transition between simple and cycloidal spiral magnetic structures.

KW - high pressure magnetism

KW - material design

KW - phase transition

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Controlling phase transitions in MnNiGe using thermal quenching and hydrostatic pressure

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