Surface magnetoelastic coupling

Sun, Shiyuan; O’Handley, R. C.

doi:10.1103/physrevlett.66.2798

Cited by 121 publications

(29 citation statements)

References 25 publications

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“…We note that the magnetoelastic coupling coefficients B i in ferromagnetic thin films may deviate from the bulk values due to surface effects and/or the influence of strain. 85,86 In our analysis, we neglect these effects and use the bulk values λ 100 = −19.5 × 10 −6 and λ 111 = +77.6 × 10 −6 for the calculations. 87 A proportionality factor χ is introduced to account for any deviation in the magnetoelastic coupling from bulk-like behavior.…”

Section: Magnetoelastic Effectsmentioning

confidence: 99%

Converse magnetoelectric effects in Fe3O4/BaTiO3multiferroic hybrids

et al. 2013

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The quantitative understanding of converse magnetoelectric effects, i.e., the variation of the magnetization as a function of an applied electric field, in extrinsic multiferroic hybrids is a key prerequisite for the development of future spintronic devices. We present a detailed study of the strain-mediated converse magnetoelectric effect in ferrimagnetic Fe3O4 thin films on ferroelectric BaTiO3 substrates at room temperature. The experimental results are in excellent agreement with numerical simulation based on a two-region model. This demonstrates that the electric field induced changes of the magnetic state in the Fe3O4 thin film can be well described by the presence of two different ferroelastic domains in the BaTiO3 substrate, resulting in two differently strained regions in the Fe3O4 film with different magnetic properties. The two-region model allows to predict the converse magnetoelectric effects in multiferroic hybrid structures consisting of ferromagnetic thin films on ferroelastic substrates.

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Section: Magnetoelastic Effectsmentioning

confidence: 99%

Converse magnetoelectric effects in Fe3O4/BaTiO3multiferroic hybrids

et al. 2013

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“…Surface terms go with K s /t Fe , with K s being the surface or interface magnetic anisotropy constant. On the other hand, the strains in the film can modify the values of the bulk [25] and surface [26] magnetic anisotropy coefficients. These contributions are significant in Fe(110)/W(110) films and explain the switching of M from the [110] to the [001] in-plane direction as the iron film thickness increases [25,27].…”

Section: Discussionmentioning

confidence: 99%

Strain-induced spin reorientation of bcc-like iron films grown on Cu(001)

et al. 2014

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The in-plane orientation of the magnetization vector M in bcc-like Fe(110) films grown on Cu(001) is determined by means of scanning electron microscopy with polarization analysis. For thicknesses of 2 nm, slightly above the fcc/bcc phase transition, it is found that M is oriented along the 110 directions of the Cu (001) substrate. Following the Pitsch orientational relationship these correspond to magnetically hard 111 and 112 axes of bulk iron. This finding is in strong contrast to the behavior reported for thicker films (above 3 nm) of bcc Fe/Cu(001), where the 100 directions of the substrate are preferred. The role of strain in the iron film is discussed, inferring that the presence of a shear strain is mandatory to explain the spin reorientation via the magnetoelastic contribution to the magnetic anisotropy energy.

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“…(11), replicates a change of sign in K 6,eff 6 as H is swept in the [Ho 85 /Lu 15 ] 50 superlattice (SL), in which the SFT was first observed [21], the first aspect we must consider is the influence that the finite size [50] of the Ho layers has upon the MEL constants. Thus, as an earlier study [47] has shown, the development of typical epitaxial strains in multilayered rare earth based systems originated a negligible alteration, if any at all, in the γ -MEL constants, however, the α-MEL ones experienced an appreciable strain-induced modification, which is in a general case modelled as follows [23]:…”

Section: Spin-flop Transition Model In Holmium: Competing Mel Anmentioning

confidence: 99%

Spin-flop transition driven by competing magnetoelastic anisotropy terms in a spin-spiral antiferromagnet

Benito

2015

Phys. Rev. B

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Holmium, the archetypical system for spin-spiral antiferromagnetism, undergoes an in-plane spin-flop transition earlier attributed to competing symmetry-breaking and fully symmetric magnetoelastic anisotropy terms [Phys. Rev. Lett. 94, 227204 (2005)], which underlines the emergence of sixfold magnetoelastic constants in heavy rare earth metals, as otherwise later studies suggested. A model that encompasses magnetoelastic contributions to the in-plane sixfold magnetic anisotropy is laid out to elucidate the mechanism behind the spin-flop transition. The model, which is tested in a Ho-based superlattice, shows that the interplay between competing fully symmetric α-magnetoelastic and symmetry-breaking γ -magnetoelastic anisotropy terms triggers the spin reorientation. This also unveils the dominant role played by the sixfold exchange magnetostriction constant, where D 66 α2 0.32 GPa against its crystal-field counterpart M 66 α2 −0.2 GPa, in contrast to the crystal-field origin of the symmetry-breaking magnetostriction in rare earth metals.

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Surface magnetoelastic coupling

Cited by 121 publications

References 25 publications

Converse magnetoelectric effects in Fe3O4/BaTiO3multiferroic hybrids

Converse magnetoelectric effects in Fe3O4/BaTiO3multiferroic hybrids

Strain-induced spin reorientation of bcc-like iron films grown on Cu(001)

Spin-flop transition driven by competing magnetoelastic anisotropy terms in a spin-spiral antiferromagnet

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