Magnetic, structural, and transport properties of the Heusler alloys<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Co</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mi mathvariant="normal">MnSi</mml:mi></mml:math>and NiMnSb

Ritchie, Lance; Xiao, Gang; Ji, Yi; Chen, Tingyong; Chien, C. L.; Zhang, Ming; Chen, Jinglan; Liu, Zhuhong; Wu, Guangheng; Zhang, Xixiang

doi:10.1103/physrevb.68.104430

Cited by 238 publications

(142 citation statements)

References 25 publications

(19 reference statements)

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“…Hence the spin polarization was found to be large, but not 100%. More recent superconducting/ferromagnetic point contact measurements on a Co 2 MnSi single crystal gave a spin polarization of 55% [47]. Similarly, the degree of spin polarization determined from the analysis of spin resolved photoemission spectra was always found to be definitely below 100% [48,49].…”

Section: Dos (States/ev)mentioning

confidence: 89%

Antiferromagnetic dipolar ordering in[Co2MnGe∕V]Nmultilayers

et al. 2005

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Section: Dos (States/ev)mentioning

confidence: 89%

Antiferromagnetic dipolar ordering in[Co2MnGe∕V]Nmultilayers

et al. 2005

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“…Gd 10 ± 760 250 [46] 140 ± 66 0.7 [50] No Tb 10 ± 740 250 [46] 140 ± 64.5 0.6 [51] No Bulk ± 95 000 85 000 [57] 300 ± 350 20 [65] Yes SrRuO 3 600 ± 9000 6000 [57] 140 [69] No [40]. In addition, the chemical potential shifts are significantly smaller, as shown in figure 4.…”

Section: Comparison With Experimental Evidencementioning

confidence: 99%

Laser-induced ultrafast spin current pulses: a thermodynamic approach

Fognini

Michlmayr

Vaterlaus

et al. 2017

J. Phys.: Condens. Matter

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“…Experimentally, the temperature dependent magnetization of NiMnSb follows Bloch's T 3/2 law up to about 70-100 K, 63,64 which cannot be reproduced within classical Heisenberg models. Element (or sublattice) specific experiments were done using neutron scattering 65 and X-ray magnetic circular dichroism (XMCD).…”

Section: H({mmentioning

confidence: 99%

Exchange interactions and local-moment fluctuation corrections in ferromagnets at finite temperatures based on noncollinear density-functional calculations

et al. 2013

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We explore the derivation of interatomic exchange interactions in ferromagnets within density-functional theory (DFT) and the mapping of DFT results onto a spin Hamiltonian. We delve into the problem of systems comprising atoms with strong spontaneous moments together with atoms with weak induced moments. All moments are considered as degrees of freedom, with the strong moments thermally fluctuating only in angle and the weak moments thermally fluctuating in angle and magnitude. We argue that a quadratic dependence of the energy on the weak local moments magnitude, which is a good approximation in many cases, allows for an elimination of the weak-moment degrees of freedom from the thermodynamic expressions in favor of a renormalization of the Heisenberg interactions among the strong moments. We show that the renormalization is valid at all temperatures accounting for the thermal fluctuations and resulting in temperature-independent renormalized interactions. These are shown to be the ones directly derived from total-energy DFT calculations by constraining the strong-moment directions, as is done e.g. in spin-spiral methods. We furthermore prove that within this framework the thermodynamics of the weak-moment subsystem, and in particular all correlation functions, can be derived as polynomials of the correlation functions of the strong-moment subsystem with coefficients that depend on the spin susceptibility and that can be calculated within DFT. These conclusions are rigorous under certain physical assumptions on the measure in the magnetic phase space. We implement the scheme in the full-potential linearized augmented plane wave (FLAPW) method using the concept of spin-spiral states, considering applicable symmetry relations and the use of the magnetic force theorem. Our analytical results are corroborated by numerical calculations employing DFT and a Monte Carlo method.

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Magnetic, structural, and transport properties of the Heusler alloysCo2MnSiand NiMnSb

Cited by 238 publications

References 25 publications

Antiferromagnetic dipolar ordering in[Co2MnGe∕V]Nmultilayers

Antiferromagnetic dipolar ordering in[Co2MnGe∕V]Nmultilayers

Laser-induced ultrafast spin current pulses: a thermodynamic approach

Exchange interactions and local-moment fluctuation corrections in ferromagnets at finite temperatures based on noncollinear density-functional calculations

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