About: Extraordinary magnetic and structural properties of the off-stoichiometric and the Co-doped Ni2MnGa Heusler alloys under high pressure     Goto   Sponge   NotDistinct   Permalink

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  • To show and to describe a contrast between the magnetic and structural properties of the stoichiometric Ni2MnGa alloy and the off-stoichiometric and the Co-doped Ni–Mn–Ga alloys, we report the effect of high hydrostatic pressure (up to 1.2 GPa) on magnetization and the critical temperatures of structural and magnetic transitions in the off-stoichiometric Ni50xMn25+x+yGa25y and the Co-doped Ni50xCoxMn25+yGa25y Heusler alloys. A huge decrease in their saturation magnetization MM(5 K) under pressure was observed with an extreme value of pressure parameter d ln MM(5 K)/dP = 56 103 GPa1 in the case of the Ni39Co11Mn34Ga16 alloy. The Curie temperature TCA increases under pressure in all the studied alloys. Almost identical values of dTCA/dP = +4.7 +5.9 K GPa1 point to a normalized steepness of a dependence of exchange interactions on interatomic distances.
  • To show and to describe a contrast between the magnetic and structural properties of the stoichiometric Ni2MnGa alloy and the off-stoichiometric and the Co-doped Ni–Mn–Ga alloys, we report the effect of high hydrostatic pressure (up to 1.2 GPa) on magnetization and the critical temperatures of structural and magnetic transitions in the off-stoichiometric Ni50xMn25+x+yGa25y and the Co-doped Ni50xCoxMn25+yGa25y Heusler alloys. A huge decrease in their saturation magnetization MM(5 K) under pressure was observed with an extreme value of pressure parameter d ln MM(5 K)/dP = 56 103 GPa1 in the case of the Ni39Co11Mn34Ga16 alloy. The Curie temperature TCA increases under pressure in all the studied alloys. Almost identical values of dTCA/dP = +4.7 +5.9 K GPa1 point to a normalized steepness of a dependence of exchange interactions on interatomic distances. (en)
Title
  • Extraordinary magnetic and structural properties of the off-stoichiometric and the Co-doped Ni2MnGa Heusler alloys under high pressure
  • Extraordinary magnetic and structural properties of the off-stoichiometric and the Co-doped Ni2MnGa Heusler alloys under high pressure (en)
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  • Extraordinary magnetic and structural properties of the off-stoichiometric and the Co-doped Ni2MnGa Heusler alloys under high pressure
  • Extraordinary magnetic and structural properties of the off-stoichiometric and the Co-doped Ni2MnGa Heusler alloys under high pressure (en)
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  • RIV/68378271:_____/14:00435763!RIV15-GA0-68378271
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  • I, P(GAP204/12/0692)
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  • RIV/68378271:_____/14:00435763
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  • Heusler alloys; martensitic transformation; magnetic properties; high pressure (en)
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  • GB - Spojené království Velké Británie a Severního Irska
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  • [AF37ADA25D5C]
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  • 77
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  • Kaštil, Jiří
  • Albertini, F.
  • Arnold, Zdeněk
  • Fabbrici, S.
  • Kamarád, Jiří
http://linked.open...ain/vavai/riv/wos
  • 000340303200006
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  • 1359-6454
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  • 10.1016/j.actamat.2014.06.011
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