Electric-field effect on coercivity distributions in FePt magneto-electric devices

Diez, L. Herrera; Bernand-Mantel, Anne; Michele, O; Vila, Laurent; Warin, P.; Marty, A.; Ranno, Laurent; Givord, D.

doi:10.1063/1.4774382

Cited by 14 publications

(3 citation statements)

References 20 publications

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“…24 However, as seen in Fig. 3, the electric-field effect in coercivity that can be observed using HfO 2 (a) and ZrO 2 /HfO 2 (b) dielectric layers is completely suppressed when using Al 2 O 3 .…”

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confidence: 97%

Voltage control of magnetism in ferromagnetic structures

Diez

Lin²,

Bernand-Mantel³

et al. 2012

SPIE Proceedings

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Until now, spintronics devices have relied on polarized currents, which still generate relatively high dissipation, particularly for nanodevices based on DW motion. A novel solution to further reduce power consumption is emerging, based on electric field (E) gating to control the magnetic state. Here, we will describe the state of the art and our recent experiments on voltage induced changes in the magnetic properties of ferromagnetic metals. A thorough description of the advances in terms of control of intrinsic properties such as magnetic anisotropy and ferromagnetic transition temperature as well as in intrinsic properties like coercive field and domain wall motion will be presented. Additionally, a section will be dedicated to the summary of the key aspects concerning the fabrication and performance of magneto-electric field-effect devices.

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confidence: 97%

Voltage control of magnetism in ferromagnetic structures

Diez

Lin²,

Bernand-Mantel³

et al. 2012

SPIE Proceedings

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“…7,15,16 It is reported that the as-deposited FePt film exhibits a facecentered cubic (FCC) structure with soft ferromagnetic properties. Subsequent thermal annealing leads to a phase transformation from disordered FCC structure to ordered and magnetically hard FCT structure.…”

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confidence: 99%

Electrical controlled magnetism in FePt film with the coexistence of two phases

Yang

Wen

Xiong

et al. 2015

Applied Physics Letters

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A series of FePt films with different magnetic structures are deposited on Pb(Mg1/3Nb2/3)O3–PbTiO3 substrates. By applying an electric field across the piezoelectric single crystal substrate, an magnetoelectric effect is observed in FePt/Pb(Mg1/3Nb2/3)O3–PbTiO3 heterostructure due to the phase transformation between face-centered cubic and face-centered tetragonal phases in the film. Taking advantage of the different coercivity caused by the electric field, the sign of magnetization can be manipulated reversibly at room temperature with the electric field switching on or off. Based on this experimental result, we demonstrate a model for the technology of information storage, in which data can be written electrically without false writing.

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“…1) Since then, the field effect has been studied in various types of ferromagnetic material. Recent progress in gating technology that uses high-k dielectrics, ferroelectric insulators, and electrolytes has made it possible to modify the magnetic properties of materials with a metallic carrier concentration such as 3d metals, 2,3) their alloys, [4][5][6][7][8] and oxides. 9,10) These electrically tunable magnetic devices are promising because, in addition to their added functionality, their simple architecture is compatible with current semiconductor technologies.…”

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confidence: 99%

Unstrained Epitaxial Zn-Substituted Fe₃O₄ Films for Ferromagnetic Field-Effect Transistors

Ichimura

Fujiwara

Kushizaki

et al. 2013

Jpn. J. Appl. Phys.

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Nonlinear mode coupling of the (shear) Alfvén eigenmodes (AEs) is studied both analytically and numerically to understand the effect of the magnetohydrodynamic nonlinearity on the saturation mechanism. The energy transfer via the mode coupling can restrict the amplitude to a level that is estimated by the frequency mismatch and the coupling coefficient among the coupled modes. For the cases of cylindrical and toroidal geometries, new numerical codes are developed to calculate the coupling coefficient directly according to the Lagrangian theory of weakly nonlinear perturbations. It is shown that the shear AEs can couple with each other through the small compressional components of their eigenfunctions. By assuming low-β plasma, an analytic estimation of the coupling coefficient (∝ √ β) is derived in the cylindrical case. A coupling of reversed shear AEs in toroidal geometry indicates a more effective energy transfer at a lower amplitude level owing to the enhanced compressional perturbations in the poloidal sidebands. * a ,ξ b ,ξ c ) [9]. This formalism will be

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Electric-field effect on coercivity distributions in FePt magneto-electric devices

Cited by 14 publications

References 20 publications

Voltage control of magnetism in ferromagnetic structures

Voltage control of magnetism in ferromagnetic structures

Electrical controlled magnetism in FePt film with the coexistence of two phases

Unstrained Epitaxial Zn-Substituted Fe₃O₄ Films for Ferromagnetic Field-Effect Transistors

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Electric-field effect on coercivity distributions in FePt magneto-electric devices

Cited by 14 publications

References 20 publications

Voltage control of magnetism in ferromagnetic structures

Voltage control of magnetism in ferromagnetic structures

Electrical controlled magnetism in FePt film with the coexistence of two phases

Unstrained Epitaxial Zn-Substituted Fe3O4 Films for Ferromagnetic Field-Effect Transistors

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Unstrained Epitaxial Zn-Substituted Fe₃O₄ Films for Ferromagnetic Field-Effect Transistors