Influence of strain on the magnetization and magnetoelectric effect inLa0.7A0.3MnO3∕PMN−PT

Abstract

We investigate the influence of a well-defined reversible biaxial strain ≤ 0.12 % on the magnetization ( M ) of epitaxial ferromagnetic manganite films. M has been recorded depending on temperature, strain and magnetic field in 20 -50 nm thick films. This is

Electric-field switching of perpendicularly magnetized multilayers

“…32 Another popular approach towards the engineering of electric-field-controlled magnetic properties is based on interfacial mechanical strain coupling between ferromagnetic and ferroelectric materials in multiferroic hybrids. [4][5][6]8,10,12,[21][22][23][24][25][26][27][28][29][30][31]38 In this case, transfer of lattice strains across interfaces alters the magnetoelastic anisotropy of a ferromagnetic layer via inverse magnetostriction. Anisotropy modulations of more than one order of magnitude have been obtained, which has enabled full electric-field control of the magnetization orientation in two-phase multiferroic systems.…”

“…Various studies have been published on electric-field-controlled magnetic effects in recent years, including magnetic domain wall propagation, 1-8 magnetic phase transitions, [9][10][11][12] spin polarization, 13,14 magnetic anisotropy [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] and exchange bias. [33][34][35][36][37] Electric-field control of perpendicular magnetic anisotropy (PMA) would open up new prospects for the realization of high-density magnetic memory and logic technologies operating at low energy consumption levels.…”

Coherent piezoelectric strain transfer to thick epitaxial ferromagnetic films with large lattice mismatch

“…The most commonly used piezoelectric substrate is (1-x)Pb(Mg 1/3 Nb 2/3 )O 3 -xPbTiO 3 , which is a well-known relaxor ferroelectric material with excellent electromechanical and piezoelectric properties for compositions near the morphotropic phase 3 boundary (0.25  x  0.35) [12]. Piezoelectric strain transfer from PMN-PT substrates has, for example, been used to tune the magnetic properties of manganite [13,14], ferrite [15][16][17][18][19], and metallic magnetic films [20][21][22][23], to alter the electrical resistance of magnetic oxides [13,18,[24][25][26], to demonstrate straincontrolled light emission from semiconductor heterostructures [27,28], and to tailor the properties of graphene [29]. In addition, strain-modulation of magnetic properties on a microscopic scale has recently been demonstrated in ferromagnetic-ferroelectric hybrids [30][31][32], which has opened new ways to electric control of ferromagnetic domain formation and magnetic domain wall motion [33,34].…”

Magnetoelectric coupling across the interface of multiferroic nanocomposites

“…In rhombohedral Pb(Mg 1/3 Nb 2/3 ) 0. 72 Ti 0.28 O 3 (PMN-PT) single crystals with high piezoelectricity, Thiele et al [27] discovered that the T c of LSMO thin film increased by 19 K and the ME coefficient was about 6×10 −8 s m −1 , which further confirmed the effective contribution from the strain transfer across the interface on the ME coupling. In principle, mechanical-stress-controlled Mn-O bond length can be assumed as the microscopic origin of the ferromagnetic states of the LSMO thin film.…”