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Epitaxial strain and composition-dependent magnetic properties of MnxGa1-x alloys
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Tillämpad materialfysik.ORCID-id: 0000-0002-8382-443X
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Tillämpad materialfysik. Uppsala University, Sweden; Wigner Research Center for Physics, Hungary.ORCID-id: 0000-0003-2832-3293
2014 (engelsk)Inngår i: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 90, nr 14, s. 144413-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Using first-principles calculation, we have investigated the structural and magnetic properties of MnxGa1-x alloys with Mn content (x) changing from 0.5 to 0.75 in step of x = 0.125. The MnxGa1-x systems crystallize in tetragonal structures, and the tetragonal ratio (c/a) is strongly influenced by chemical composition. The in-plane lattice constants (a) show very weak concentration dependence, but the lattice parameters along the z axis (c) are significantly modified by x. We have found that the magnetic properties of MnxGa1-x alloys are strongly affected by the Mn content and the epitaxial strain. Very interestingly, the magnetocrystalline anisotropy (MCA) of MnxGa1-x alloys follows totally different behaviors with x and epitaxial strain. An especially wide range of MCA values are obtained by straining the Mn0.5Ga0.5 alloy. The spin polarization (at the Fermi level) of Mn0.75Ga0.25 has been calculated from 44% to 57% with epitaxial strain.

sted, utgiver, år, opplag, sider
American Physical Society , 2014. Vol. 90, nr 14, s. 144413-
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Identifikatorer
URN: urn:nbn:se:kth:diva-156987DOI: 10.1103/PhysRevB.90.144413ISI: 000344019300003Scopus ID: 2-s2.0-84908042608OAI: oai:DiVA.org:kth-156987DiVA: diva2:769461
Forskningsfinansiär
Swedish Research CouncilEU, European Research Council
Merknad

QC 20141208

Tilgjengelig fra: 2014-12-08 Laget: 2014-12-04 Sist oppdatert: 2017-12-05bibliografisk kontrollert

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