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Title: Magnetic and transport properties of as-prepared Mn2CoGa

Abstract

Magnetic and transport properties of as-prepared Mn2CoGa polycrystalline Heusler alloy were investigated. Results of magnetic measurements were found to agree well with literature data, i.e., the studied Mn2CoGa is a ferrimagnet with magnetic moment of 2.03 μB/f.u. and a high Curie temperature TC = 728 K. Measurements of transport properties revealed that electrical resistivity rho of Mn2CoGa is anomalously large (~250 μΩ.cm at room temperature) and demonstrates a complex temperature dependence. Specifically, in the measured temperature interval from 80 K to 375 K, the electrical resistivity is proportional to T2 up to T ~200 K while at higher temperatures rho can be fitted by rho(T) = A + B.exp(-CT) expression. These changes in the scattering mechanisms are accompanied by a change of the magnetoresistance sign from positive at T below ~200 K to negative at higher temperatures.

Authors:
 [1];  [1];  [1];  [2];  [3];  [1];  [4];  [5];  [6]
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  1. National Univ. of Science and Technology, Moscow (Russian Federation)
  2. National Univ. of Science and Technology, Moscow (Russian Federation); National Research South Ural State Univ., Chelyabinsk (Russian Federation); Chelyabinsk State Univ. (Russian Federation)
  3. National Research South Ural State Univ., Chelyabinsk (Russian Federation)
  4. Indian Inst. of Technology (IIT), New Delhi (India)
  5. Argonne National Lab. (ANL), Argonne, IL (United States)
  6. National Univ. of Science and Technology, Moscow (Russian Federation); National Research South Ural State Univ., Chelyabinsk (Russian Federation)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
Russian Science Foundation; USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division
OSTI Identifier:
1502503
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Magnetism and Magnetic Materials
Additional Journal Information:
Journal Volume: 470; Journal Issue: C; Journal ID: ISSN 0304-8853
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Heusler alloys; electrical resistivity; half-metallic ferrimagnets; spintronics

Citation Formats

Seredina, M., Gavrikov, I., Gorshenkov, M., Taskaev, S., Dyakonov, A., Komissarov, A., Chatterjee, Ratnamala, Novosad, V., and Khovaylo, V. Magnetic and transport properties of as-prepared Mn2CoGa. United States: N. p., 2017. Web. doi:10.1016/j.jmmm.2017.12.043.
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Seredina, M., Gavrikov, I., Gorshenkov, M., Taskaev, S., Dyakonov, A., Komissarov, A., Chatterjee, Ratnamala, Novosad, V., & Khovaylo, V. Magnetic and transport properties of as-prepared Mn2CoGa. United States. https://doi.org/10.1016/j.jmmm.2017.12.043
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Seredina, M., Gavrikov, I., Gorshenkov, M., Taskaev, S., Dyakonov, A., Komissarov, A., Chatterjee, Ratnamala, Novosad, V., and Khovaylo, V. Wed . "Magnetic and transport properties of as-prepared Mn2CoGa". United States. https://doi.org/10.1016/j.jmmm.2017.12.043. https://www.osti.gov/servlets/purl/1502503.
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@article{osti_1502503,
title = {Magnetic and transport properties of as-prepared Mn2CoGa},
author = {Seredina, M. and Gavrikov, I. and Gorshenkov, M. and Taskaev, S. and Dyakonov, A. and Komissarov, A. and Chatterjee, Ratnamala and Novosad, V. and Khovaylo, V.},
abstractNote = {Magnetic and transport properties of as-prepared Mn2CoGa polycrystalline Heusler alloy were investigated. Results of magnetic measurements were found to agree well with literature data, i.e., the studied Mn2CoGa is a ferrimagnet with magnetic moment of 2.03 μB/f.u. and a high Curie temperature TC = 728 K. Measurements of transport properties revealed that electrical resistivity rho of Mn2CoGa is anomalously large (~250 μΩ.cm at room temperature) and demonstrates a complex temperature dependence. Specifically, in the measured temperature interval from 80 K to 375 K, the electrical resistivity is proportional to T2 up to T ~200 K while at higher temperatures rho can be fitted by rho(T) = A + B.exp(-CT) expression. These changes in the scattering mechanisms are accompanied by a change of the magnetoresistance sign from positive at T below ~200 K to negative at higher temperatures.},
doi = {10.1016/j.jmmm.2017.12.043},
journal = {Journal of Magnetism and Magnetic Materials},
number = C,
volume = 470,
place = {United States},
year = {Wed Dec 13 00:00:00 EST 2017},
month = {Wed Dec 13 00:00:00 EST 2017}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1016/j.jmmm.2017.12.043
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Cited by: 6 works
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Figures / Tables:

Figure 1 Figure 1: SEM image of as-prepared Mn2CoGa
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Works referenced in this record:

Heusler compounds and spintronics
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Giant tunneling magnetoresistance in epitaxial Co 2 MnSi/MgO/Co 2 MnSi magnetic tunnel junctions by half-metallicity of Co 2 MnSi and coherent tunneling
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First-principle prediction of half-metallic ferrimagnetism of the Heusler alloys Mn2CoZ (Z=Al, Ga, Si, Ge) with a high-ordered structure
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    Works referencing / citing this record:

    Investigation of the structural competing and atomic ordering in Heusler compounds Fe 2 NiSi and Ni 2 FeSi under strain condition
    journal, September 2019

    • Yang, Tie; Hao, Liyu; Khenata, Rabah
    • Royal Society Open Science, Vol. 6, Issue 9
    • DOI: 10.1098/rsos.191007

    Ab Initio Study of the Structural, Electronic, Magnetic, Mechanical and Thermodynamic Properties of Full-Heusler Mn2CoGa
    journal, July 2019

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