Converse Magnetoelectric Effect in Epitaxial Co₂MnSi/Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃ Multiferroic Heterostructures

Strain-induced magnetic anisotropy in Heusler alloys studied from first principles

“…The applicability of the MF heterostructures to effectively tune the magnetic properties relies on the ME coupling between the ferroelectric and ferromagnetic orders. [1][2][3][4][5][6][7][8][9] Recently, the MF heterostructures made of the Cobased Heusler alloys, Co 2 FeSi and Co 2 MnSi, grown on Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 (PMN-PT) substrates produce high ME coefficients of the order of 10 −6 to 10 −5 s m -1 depending on the interface index. 7,8) On the other hand, the ME coefficient of Fe 3 Si/PMN-PT becomes approximately one-tenth of the cases with Co 2 FeSi and Co 2 MnSi.…”

“…[1][2][3][4][5][6][7][8][9] Recently, the MF heterostructures made of the Cobased Heusler alloys, Co 2 FeSi and Co 2 MnSi, grown on Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 (PMN-PT) substrates produce high ME coefficients of the order of 10 −6 to 10 −5 s m -1 depending on the interface index. 7,8) On the other hand, the ME coefficient of Fe 3 Si/PMN-PT becomes approximately one-tenth of the cases with Co 2 FeSi and Co 2 MnSi. 8) Even though the ME effect in these MF heterostructures comes from the modulation of the magnetic anisotropy of the Heusler alloys by the interfacial strain due to ferroelectricdomain changes that applied electric fields induce, the microscopic mechanism of such strain-induced modulations of the magnetic anisotropy remains unclear.…”