Perpendicular magnetic anisotropy in sputtered amorphous TbFeCo films

Spin-orbit torques are studied in Ta/TbFeCo patterned structures with a bulk perpendicular magnetic anisotropy (bulk-PMA) for the first time. The current-induced magnetization switching is investigated in the presence of a perpendicular, longitudinal, or transverse field. In order to rule out Joule heating effect, switching of the magnetization is also demonstrated using current pulses.It is found that the anti-damping torque correlated with spin Hall effect is very strong, and a spinHall angle of about 0.12 is obtained. The field-like torque related with Rashba effect is negligib le in this structure suggesting that the interface play a significant role in Rashba-like torque.

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“…The as-deposited films demonstrate a strong intrinsic perpendicular anisotropy [27][28][29] as shown in Fig. 1(a).…”

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confidence: 90%

Spin Hall switching of the magnetization in Ta/TbFeCo structures with bulk perpendicular anisotropy

Zhao

Jamali

Smith

et al. 2015

Applied Physics Letters

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“…The magnetic anisotropy of the initial state before electrical poling was characterized by measuring the Kerr hysteresis loops with external magnetic field H along the [0 1 1], [1 0 0], and [0 1 1] directions. The corresponding hysteresis loops in figure 1(d) show that the TbFeCo film prepared by PLD possesses in-plane magnetic anisotropy with an easy axis along the [0 1 1] direction, which is unlike that of PMA in the TbFeCo film prepared by sputtering deposition [24,26]. The mechanism of PMA in TbFeCo films is not yet fully understood.…”

Section: Resultsmentioning

confidence: 98%

“…On the other hand, rare earth-transition metal (RE-TM) TbFeCo alloy films possess perpendicular magnetic anisotropy (PMA) and large magnetostriction constant [23,24]. However, in-plane magnetic anisotropy can also be induced by annealing TbFeCo films [25,26], or by changing the sputtering power [24]. To date, there have been no investigations to clarify whether the magnetic anisotropy of TbFeCo films is sensitive to film-fabrication methods other than sputtering.…”

Section: Introductionmentioning

confidence: 99%

Electric field-induced non-volatile 90° rotation of in-plane magnetic anisotropy in TbFeCo film grown on PMN-PT(0 1 1) substrate

Xiao

Liu

et al. 2019

J. Phys. D: Appl. Phys.

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A TbFeCo alloy film with in-plane uniaxial magnetic anisotropy was fabricated by pulsed laser deposition on a (0 1 1)-oriented Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 (PMN-PT) substrate. By applying electric field along the surface normal, the magnetic easy axis was rotated 90° from the [0 1 1] to the [1 0 0] direction by strain-mediated magnetoelectric coupling. The modulation effect was further confirmed microscopically from variation of the magnetic domain configuration. Importantly, the magnetic easy axis remains along the [1 0 0] direction after removal of the electric field. We speculate that this non-volatile modulation was triggered by an irreversible rhombohedral to orthorhombic phase transition of PMN-PT.

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“…This is a great advantage when investigating microscopic magnetic properties of materials, in particular spin-specific innate properties; Compton scattering measurements have a unique advantage in that the spin magnetic moment of magnetic electrons in condensed matter can be directly studied. For example, magnetic Compton scattering measurements have been used to show that the magnetic anisotropy of rare-earth (RE) transition metal (TM) amorphous film is induced by the asymmetry of the wavefunction of magnetic electrons (Liu et al, 2007;Sakurai et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Application of magnetic Compton scattering for spin-specific magnetic hysteresis measurement

Agui

Sakurai

Tamura

et al. 2010

J Synchrotron Radiat

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An application of magnetic Compton scattering as a new tool to measure a spin-specific magnetic hysteresis (SSMH) loop is introduced and its validity demonstrated. The applied magnetic field dependence of the integrated intensity of magnetic Compton scattering spectra, which reflect only the spin-dependent magnetic properties of magnetically active electrons, was interpreted as the spin-specific hysteresis. The spin magnetization of amorphous Tb(33)Co(67) film was observed and its SSMH loop exhibited qualitative agreement with the ordinal magnetic hysteresis loop measured using a conventional vibrating sample magnetometer.

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Perpendicular magnetic anisotropy in sputtered amorphous TbFeCo films

Cited by 10 publications

References 5 publications

Spin Hall switching of the magnetization in Ta/TbFeCo structures with bulk perpendicular anisotropy

Spin Hall switching of the magnetization in Ta/TbFeCo structures with bulk perpendicular anisotropy

Electric field-induced non-volatile 90° rotation of in-plane magnetic anisotropy in TbFeCo film grown on PMN-PT(0 1 1) substrate

Application of magnetic Compton scattering for spin-specific magnetic hysteresis measurement

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