Pressure Dependence of Magnetic Transition Temperatures and Lattice Parameter in an Antiferromagnetic Ordered Alloy Mn<sub>3</sub>Pt

Yasui, Hiroyuki; Kaneko, T.; Yoshida, Hajime; Abe, S.; Kamigaki, Kazuo; Môri, N.

doi:10.1143/jpsj.56.4532

Cited by 27 publications

(17 citation statements)

References 12 publications

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“…2 magnetic structure as the lowest energy state of the system as shown in Table I. The magnetic moment obtained here is 3.09 per Mn atom, which is in fairly good agreement with the experimental value [2]. We note here that the present results are consistent with the previous theoretical work done by J. Kübler, K.-H. Höck, J. Sticht, and A. R. Williams [3].…”

Section: Resultssupporting

confidence: 91%

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Ab-Initio Study on the Magnetic Structures in the Ordered Mn$_{3}$Pt Alloy

2008

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We study the electronic states of the magnetically ordered Mn 3 Pt alloy within the density functional theory. Mn 3 Pt has been believed that one third of Mn atoms have no magnetic moment in an antiferromagnetic phase (so-called the F-phase) realized in the temperature range of 400 K 475 K. We show that this experimentally suggested spin configuration is energetically so much unfavorable that it would be irrelevant to the F-phase. We discuss the possibility that the spin moments on the one third of Mn atoms are not paramagnetic but thermally fluctuating in the F-phase. The present results have an immediate connection with the recent neutron scattering study [T.

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Section: Resultssupporting

confidence: 91%

“…The magnetically ordered Mn Pt alloy with the L1 (Cu Au) type chemical structure has long been studied and considered to be such a frustrated AF system, which shows the first order phase transition between two AF phases [1], [2]. The magnetic structures of these two phases are determined by neutron scattering measurements.…”

Section: Introductionmentioning

confidence: 99%

Ab-Initio Study on the Magnetic Structures in the Ordered Mn$_{3}$Pt Alloy

2008

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“…It may also be possible to further reduce the MPT temperature to room temperature (300 K) by choosing appropriate materials. For instance, it has been experimentally shown that the MPT temperature of non-stoichiometry Mn3PtNx and Mn3-xPt1+x alloys [25,39,40] can be lowered down to room temperature, and theoretically shown that Mn-based antiperovskite nitrides [41] may have similar AFM phase transition. And also instead of BaTiO3 substrate, an alternative piezoelectric substrate with a larger piezoelectric effect, for example, PMN-PT (Pb(Mg1/3Nb2/3)O3-PbTiO3) [42] substrate may lead to a MPT at room temperature.…”

Section: Resultsmentioning

confidence: 99%

“…Now we will first briefly discuss the mechanism of electric field controlled MPT of Mn3Pt on a piezoelectric substrate. The transition temperature Ttr of Mn3Pt between D and F phase has been found to be closely related to its lattice constant [25] due to the so-called "magneto-volume" effect [26]. The smaller lattice constant will result in higher transition temperature Ttr of Mn3Pt.…”

Section: Introductionmentioning

confidence: 99%

Large Magnetoresistance in an Electric-Field-Controlled Antiferromagnetic Tunnel Junction

Zhang

Lü

et al. 2019

Phys. Rev. Applied

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Large magnetoresistance effect controlled by electric field rather than magnetic field or electric current is a preferable routine for designing low power consumption magnetoresistance-based spintronic devices. Here we propose an electric-field controlled antiferromagnetic (AFM) tunnel junction with structure of piezoelectric substrate/Mn3Pt/SrTiO3/Pt operating by the magnetic phase transition (MPT) of antiferromagnet Mn3Pt through its magneto-volume effect. The transport properties of the proposed AFM tunnel junction have been investigated by employing first-principles calculations. Our results show that a magnetoresistance over hundreds of percent is achievable when Mn3Pt undergoes MPT from a collinear AFM state to a non-collinear AFM state. Band structure analysis based on density functional calculations shows that the large TMR can be attributed to the joint effect of significant different Fermi surface of Mn3Pt at two AFM phases and the band symmetry filtering effect of the SrTiO3 tunnel barrier. In addition, other than single-crystalline tunnel barrier, we also discuss the robustness of the proposed magnetoresistance effect by considering amorphous AlOx barrier. Our results may open perspective way for effectively electrical writing and reading of the AFM state and its application in energy efficient magnetic memory devices.

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“…(The low-and high-temperature magnetic phases are named as the D-and the F-phases, respectively.) Yasui et al [1] carefully studied the transition temperature T t ; using the samples with less than 1% deviations from the nominal stoichiometry and determined T t as 400 K.…”

mentioning

confidence: 99%

Partial spin frustration system in the ordered Mn3Pt alloy

Ikeda¹,

Tsunoda²

2004

Journal of Magnetism and Magnetic Materials

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Pressure Dependence of Magnetic Transition Temperatures and Lattice Parameter in an Antiferromagnetic Ordered Alloy Mn₃Pt

Cited by 27 publications

References 12 publications

Ab-Initio Study on the Magnetic Structures in the Ordered Mn$_{3}$Pt Alloy

Ab-Initio Study on the Magnetic Structures in the Ordered Mn$_{3}$Pt Alloy

Large Magnetoresistance in an Electric-Field-Controlled Antiferromagnetic Tunnel Junction

Partial spin frustration system in the ordered Mn3Pt alloy

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Pressure Dependence of Magnetic Transition Temperatures and Lattice Parameter in an Antiferromagnetic Ordered Alloy Mn3Pt

Cited by 27 publications

References 12 publications

Ab-Initio Study on the Magnetic Structures in the Ordered Mn$_{3}$Pt Alloy

Ab-Initio Study on the Magnetic Structures in the Ordered Mn$_{3}$Pt Alloy

Large Magnetoresistance in an Electric-Field-Controlled Antiferromagnetic Tunnel Junction

Partial spin frustration system in the ordered Mn3Pt alloy

Contact Info

Product

Resources

About

Pressure Dependence of Magnetic Transition Temperatures and Lattice Parameter in an Antiferromagnetic Ordered Alloy Mn₃Pt