Giant pressure effects and reverse martensitic transformation in Co and In-doped NiMnGa multifunctional alloys (Comunicazione a convegno)

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  • Giant pressure effects and reverse martensitic transformation in Co and In-doped NiMnGa multifunctional alloys (Comunicazione a convegno) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Alternative label
  • Albertini F.; Kamarad J.; Arnold Z.; Fabbrici S. (2010)
    Giant pressure effects and reverse martensitic transformation in Co and In-doped NiMnGa multifunctional alloys
    in Joint European Magnetic Symposia, Cracow, Poland
    (literal)
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  • Albertini F.; Kamarad J.; Arnold Z.; Fabbrici S. (literal)
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  • In: JEMS - Joint European Magnetic Symposia (Cracow, Poland, August 23 - 28 2010). (literal)
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  • We have recently shown that for Mn-rich NiMnGa multifunctional alloys, Co substitution produces important changes in magnetism and structure, giving rise to a peculiar phase diagram showing reverse magnetostructural transformations and allowing to tune the magnetocaloric effect from direct to inverse [S. Fabbrici et al., Appl. Phys. Lett., 95 (2009) 022508]. In this contribution, we present the effects of hydrostatic pressure (up to 1 GPa) on magnetism and martensitic transformation in Ni50-xCoxMn25+yGa25-y (5x13, 5y7). This study allows to deepen the effects of volume contractions on the main properties and the fundamental interactions. Additional doping of In on the quaternary alloy has also been studied. A shift of the reverse martensitic transformation temperature Tm close to room temperature was found, together with an enhancement of the field dependence of Tm (dTm/dH (literal)
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  • CNR-IMEM, Parma, Institute of Physics, ASCR, Prague, Czech Republic (literal)
Titolo
  • Giant pressure effects and reverse martensitic transformation in Co and In-doped NiMnGa multifunctional alloys (literal)
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