Magnetic Order in Quaternary NiMnGe:T (T = Cr, Ti) Compounds

Andrzej Szytuła; Stanislav Baran; Bogusław Penc; Andreas Hoser; Vladimir Dyakonov

doi:10.4028/www.scientific.net/SSP.289.156

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HomeSolid State PhenomenaSolid State Phenomena Vol. 289Magnetic Order in Quaternary NiMnGe:T (T = Cr, Ti)...

Magnetic Order in Quaternary NiMnGe:T (T = Cr, Ti) Compounds

Abstract:

The work reports the results of neutron diffraction measurements of NiMnGe:T systems where T is Cr or Ti. All investigated compounds have the helicoidal magnetic structure with the propagation vector k = (k_a,0,0). The values of the k_a component decrease with increasing Cr content and increase with increasing Ti content. For all compounds, except the sample with x = 0.18 in Cr-system, the helicoidal order is stable up to the Néel temperature. The obtained data are analysed based on simple model in which the magnetic interactions are described by two exchange integrals J₁> 0 for first and J₂ < 0 for second neighbouring moments. This model clears up different dependence of k_a component in different systems.

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Solid State Phenomena (Volume 289)

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156-163

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https://doi.org/10.4028/www.scientific.net/SSP.289.156

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Online since:

April 2019

Authors:

Andrzej Szytuła*, Stanislav Baran, Bogusław Penc, Andreas Hoser, Vladimir Dyakonov

Keywords:

Half-Heusler Alloy, Helicoidal Magnetic Structure, Neutron Diffraction, Phase Transition

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