Structure, magnetism, and electron-transport properties of Mn2CrGa-based nanomaterials

Wenyong Zhang, Parashu Kharel, Ralph Skomski, Shah Valloppilly, Xingzhong Li, David J. Sellmyer

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Mn2CrGa in the disordered cubic structure has been synthesized using rapid quenching and subsequent annealing. The cubic phase transforms to a stable tetragonal phase when a fraction of Cr or Ga is replaced by Pt or Al, respectively. All samples are ferrimagnetic with high Curie temperatures (Tc); Mn2CrGa exhibits the highest Tc of about 813 K. The tetragonal samples have appreciable values of magnetocrystalline anisotropy energy, which leads to an increase in coercivity (Hc) that approaches about 10 kOe in the Pt-doped sample. The Hc linearly increases with a decrease of temperature, concomitant with the anisotropy change with temperature. All samples are metallic and show negative magnetoresistance with room-temperature resistivities on the order of 1 mΩcm. The magnetic properties including high Tc and low magnetic moment suggest that these tetragonal materials have potential for spin-transfer-torque-based devices.

Original languageEnglish (US)
Article number056218
JournalAIP Advances
Volume6
Issue number5
DOIs
StatePublished - May 1 2016

Fingerprint

transport properties
electrons
anisotropy
coercivity
torque
Curie temperature
magnetic moments
magnetic properties
electrical resistivity
annealing
temperature
room temperature
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Structure, magnetism, and electron-transport properties of Mn2CrGa-based nanomaterials. / Zhang, Wenyong; Kharel, Parashu; Skomski, Ralph; Valloppilly, Shah; Li, Xingzhong; Sellmyer, David J.

In: AIP Advances, Vol. 6, No. 5, 056218, 01.05.2016.

Research output: Contribution to journalArticle

Zhang, Wenyong ; Kharel, Parashu ; Skomski, Ralph ; Valloppilly, Shah ; Li, Xingzhong ; Sellmyer, David J. / Structure, magnetism, and electron-transport properties of Mn2CrGa-based nanomaterials. In: AIP Advances. 2016 ; Vol. 6, No. 5.
@article{f917f125e9904f759dc3eae642f7104f,
title = "Structure, magnetism, and electron-transport properties of Mn2CrGa-based nanomaterials",
abstract = "Mn2CrGa in the disordered cubic structure has been synthesized using rapid quenching and subsequent annealing. The cubic phase transforms to a stable tetragonal phase when a fraction of Cr or Ga is replaced by Pt or Al, respectively. All samples are ferrimagnetic with high Curie temperatures (Tc); Mn2CrGa exhibits the highest Tc of about 813 K. The tetragonal samples have appreciable values of magnetocrystalline anisotropy energy, which leads to an increase in coercivity (Hc) that approaches about 10 kOe in the Pt-doped sample. The Hc linearly increases with a decrease of temperature, concomitant with the anisotropy change with temperature. All samples are metallic and show negative magnetoresistance with room-temperature resistivities on the order of 1 mΩcm. The magnetic properties including high Tc and low magnetic moment suggest that these tetragonal materials have potential for spin-transfer-torque-based devices.",
author = "Wenyong Zhang and Parashu Kharel and Ralph Skomski and Shah Valloppilly and Xingzhong Li and Sellmyer, {David J.}",
year = "2016",
month = "5",
day = "1",
doi = "10.1063/1.4944403",
language = "English (US)",
volume = "6",
journal = "AIP Advances",
issn = "2158-3226",
publisher = "American Institute of Physics Publising LLC",
number = "5",

}

TY - JOUR

T1 - Structure, magnetism, and electron-transport properties of Mn2CrGa-based nanomaterials

AU - Zhang, Wenyong

AU - Kharel, Parashu

AU - Skomski, Ralph

AU - Valloppilly, Shah

AU - Li, Xingzhong

AU - Sellmyer, David J.

PY - 2016/5/1

Y1 - 2016/5/1

N2 - Mn2CrGa in the disordered cubic structure has been synthesized using rapid quenching and subsequent annealing. The cubic phase transforms to a stable tetragonal phase when a fraction of Cr or Ga is replaced by Pt or Al, respectively. All samples are ferrimagnetic with high Curie temperatures (Tc); Mn2CrGa exhibits the highest Tc of about 813 K. The tetragonal samples have appreciable values of magnetocrystalline anisotropy energy, which leads to an increase in coercivity (Hc) that approaches about 10 kOe in the Pt-doped sample. The Hc linearly increases with a decrease of temperature, concomitant with the anisotropy change with temperature. All samples are metallic and show negative magnetoresistance with room-temperature resistivities on the order of 1 mΩcm. The magnetic properties including high Tc and low magnetic moment suggest that these tetragonal materials have potential for spin-transfer-torque-based devices.

AB - Mn2CrGa in the disordered cubic structure has been synthesized using rapid quenching and subsequent annealing. The cubic phase transforms to a stable tetragonal phase when a fraction of Cr or Ga is replaced by Pt or Al, respectively. All samples are ferrimagnetic with high Curie temperatures (Tc); Mn2CrGa exhibits the highest Tc of about 813 K. The tetragonal samples have appreciable values of magnetocrystalline anisotropy energy, which leads to an increase in coercivity (Hc) that approaches about 10 kOe in the Pt-doped sample. The Hc linearly increases with a decrease of temperature, concomitant with the anisotropy change with temperature. All samples are metallic and show negative magnetoresistance with room-temperature resistivities on the order of 1 mΩcm. The magnetic properties including high Tc and low magnetic moment suggest that these tetragonal materials have potential for spin-transfer-torque-based devices.

UR - http://www.scopus.com/inward/record.url?scp=84961782319&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84961782319&partnerID=8YFLogxK

U2 - 10.1063/1.4944403

DO - 10.1063/1.4944403

M3 - Article

AN - SCOPUS:84961782319

VL - 6

JO - AIP Advances

JF - AIP Advances

SN - 2158-3226

IS - 5

M1 - 056218

ER -