Electric and magnetic modulation of fully strained dead layers inLa0.67Sr0.33MnO3films

Giant in-plane anisotropy in manganite thin films driven by strain-engineered double exchange interaction and electronic phase separation

“…In these materials, the complex and strong coupling between spin, charge, orbital, and lattice degrees of freedom gives rise to multiple competing phases with essentially distinct physical properties. Moreover, these phases are quite "soft" in the sense that their free energies are close to each another, thus forming a delicate balance which is very sensitive to internal/external perturbations, such as electric field (current), 4,5 light, 6 phonon, 7 and strain, [8][9][10][11][12][13] in addition to magnetic field. Among these tuning parameters, strain stands out as it is ubiquitous in thin films and devices, and it has been shown that strain also can significantly affect the charge, spin, and orbital orders in manganite thin films.…”

“…Among these tuning parameters, strain stands out as it is ubiquitous in thin films and devices, and it has been shown that strain also can significantly affect the charge, spin, and orbital orders in manganite thin films. [14][15][16][17][18] The physical properties of manganite thin films can be modulated over a wide range by strain from the underlying substrates, [8][9][10][11][12][13][14] and one of the most cited mechanisms is the strain mediated orbital-ordering of the e g state, which couples with the Jahn-Teller (JT) distortion of the MnO 6 octahedra. 19 Recently, substrate strain has been engineered to give rise to in-plane (IP) anisotropic magnetism and transport behaviors.…”

Coupling of magnetic field and lattice strain and its impact on electronic phase separation in La0.335Pr0.335Ca0.33MnO3/ferroelectric crystal heterostructures

“…For example, Gillaspie et al 9 and Wu et al 10 found that the in-plane tensile strain stabilizes the CO/AFI phase but disfavors FMM phase for La 0.325 Pr 0.3 Ca 0.375 MnO 3 films epitaxially grown on SrTiO 3 and LaAlO 3 substrates, respectively, while Jeen and Biswas, 11 and Ward et al 2 reported that the in-plane tensile strain destabilizes the CO/AFI phase but favors FMM phase for La 0.268 Pr 0.402 Ca 0.33 MnO 3 and La 0.325 Pr 0.3 Ca 0.375 MnO 3 films on NdGaO 3 and SrLaGaO 4 substrates. Besides substrate-induced strain, quenched disorders, 12,13 local Jahn-Teller type lattice distortion, 14 oxygen content, 10 intragranular strain 15 and dead layer at interface, 16 etc, are reported to have a strong influence over the EPS, making it rather difficult to obtain the intrinsic effects of lattice strain on EPS. To rule out the effects of these extrinsic variables on EPS, Dekker et al, 17 Zhang et al, 18 Wang et al, 19 and Chen et al 20 in situ applied in-plane compressive strain to La 1-x-y Pr y Ca x MnO 3 films grown on…”

“…Perovskite manganite of La 1-x-y Pr y Ca x MnO 3 is one of the well-known systems that displays large scale EPS into ferromagnetic metallic (FMM) phase and charge-ordered antiferromagnetic insulating (CO/AFI) phase at low temperatures. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] Although EPS in manganites has been widely studied over the past decade, issues regarding EPS, such as the length scale of the FMM phase, the mechanism that causes EPS, and the effects of in-plane strain on EPS, have remained controversial so far due to inconsistent experimental findings. For example, Gillaspie et al 9 and Wu et al 10 found that the in-plane tensile strain stabilizes the CO/AFI phase but disfavors FMM phase for La 0.325 Pr 0.3 Ca 0.375 MnO 3 films epitaxially grown on SrTiO 3 and LaAlO 3 substrates, respectively, while Jeen and Biswas, 11 and Ward et al 2 reported that the in-plane tensile strain destabilizes the CO/AFI phase but favors FMM phase for La 0.268 Pr 0.402 Ca 0.33 MnO 3 and La 0.325 Pr 0.3 Ca 0.375 MnO 3 films on NdGaO 3 and SrLaGaO 4 substrates.…”

Strain dependent magnetocaloric effect in La0.67Sr0.33MnO3 thin-films

“…It is also known that LSMO thin-films on LAO can have coexistence of stable ferromagnetic (FM) and anti-ferromagnetic (AFM) phases depending on the thickness of the film and the epitaxial strain, induced by the mismatch of the substrate, and the FM phase can be driven more towards AFM phase with the increase of c/a ratio. 14 Because the film in the present case is thin, it may be possible that the sharpness of T C has been influenced by the competition between the existing FM and AFM phases in LSMO film. This value of film thickness has been chosen for all the three thin-films so as to demonstrate the effect of substrate induced strain on MCE, as the thin-films with higher thickness may be relaxed.…”