The thickness and growth temperature dependences of soft magnetic properties and an effective damping parameter of (FeCo)-Si alloy thin films

Abe, Kyotaro; Wu, Shuang; Tanaka, Yohei; Ariake, Yusuke; Kanada, Isao; Mewes, Tim; Mankey, G. J.; Mewes, Claudia; Suzuki, Takao

doi:10.1063/1.5079818

Cited by 4 publications

(5 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In angular dependent FMR measurements, minima of the resonance field indicate an easy axis, whereas maxima correspond to hard axes. Therefore, the easy axes of the four-fold anisotropy are along the 100 directions of Fe 69 Co 26 Si 5 , consistent with the quasi-static magnetic properties, see figure 2 and reference 10 . Close inspection of the difference of the residual using a purely four-fold fit, i.e.…”

Section: Fmr Measurement Resultssupporting

confidence: 79%

“…The quasi-static and dynamic magnetic properties of Fe 69 Co 26 Si 5 alloy thin films of various thicknesses were studied using VSM and broadband FMR. The quasistatic magnetic properties such as saturation magnetization, coercivity and the remanence to saturation magnetization ratio all show only a weak thickness dependence, for more details see reference 10 . The dynamic measurements using broadband FMR and in-plane angle dependent measurements unambiguously show that [100] and [110] are the easy and hard axes respectively of the dominant four-fold anisotropy.…”

Section: Discussionmentioning

confidence: 99%

“…The morphology of the films including the alloying of the stack was studied using cross-sectional TEM/EDX of the films. 10 The quasi-static magnetic properties were measured using a vibrating sample magnetometer (VSM) and a magneto-optical Kerr effect (MOKE) system and have been reported in reference 10 . The dynamic properties were determined using broadband ferromagnetic resonance (FMR) covering a frequency range from 12 to 66 GHz.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…[6][7][8] An effective damping parameter as low as 0.0004 was found for an 83 nm thick Fe 73 Co 25 Al 2 thin film, which is in good agreement with the value reported by Schoen et al 9 for Fe 75 Co 25 alloy thin film. In this paper, a systematic study on the thickness dependence of the dynamic magnetic properties of Fe 69 Co 26 Si 5 alloy thin films is presented, additional information about the quasi-static properties of these films can be found in reference 10 .…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Thickness dependence of dynamic magnetic properties of soft (FeCo)-Si alloy thin films

Abe

Nakano

et al. 2019

Phys. Rev. B

Self Cite

View full text Add to dashboard Cite

Fe 69 Co 26 Si 5 alloy thin films of various thicknesses were deposited on MgO(100) single crystal substrates by magnetron sputtering at 230 ℃ substrate temperature. The thickness dependence of the dynamic magnetic properties was investigated using broadband ferromagnetic resonance (FMR). The X-ray diffraction (XRD) results indicate that all films are of the bcc structure with an in-plane epitaxial alignment of [100] FeCoSi // [110] MgO. The exchange constant was determined from the field shift between the uniform precession FMR mode and the first order perpendicular standing spin wave (PSSW) resonance mode in the FMR spectra. The effective damping parameter decreases dramatically with increasing film thickness up to 16 nm due to the decrease of the spin pumping contribution and then remains relatively constant as the film thickness increases. In-plane angle dependent FMR measurements reveal that the in-plane anisotropy of these films are dominated by a four-fold magnetic anisotropy, which increases sharply with increasing film thickness up to 16 nm and then shows a slightly decreasing trend as the film thickness increases. In-plane angular dependence of the FMR linewidth shows a strong two-magnon scattering contribution.

show abstract

Section: Fmr Measurement Resultssupporting

confidence: 79%

Section: Discussionmentioning

confidence: 99%

Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thickness dependence of dynamic magnetic properties of soft (FeCo)-Si alloy thin films

Abe

Nakano

et al. 2019

Phys. Rev. B

Self Cite

View full text Add to dashboard Cite

show abstract

“…Himalay Basumatary et al, studied the effect of deposition temperature on the magnetic properties of FeGa thin films and found that high temperature deposition can greatly reduce the coercivity, since high temperature deposition could be a feasible method to improve the soft magnetic properties of thin films [ 20 ]. There exist some studies on the effects of high temperature deposition on the magnetic properties of FeCo-based alloy thin films [ 21 , 22 , 23 , 24 ]. However, the relationships between structure and magnetic properties have not yet been systematically studied.…”

Section: Introductionmentioning

confidence: 99%

The Preparation of High Saturation Magnetization and Low Coercivity Feco Soft Magnetic Thin Films via Controlling the Thickness and Deposition Temperature

Yang

Liu

et al. 2022

Materials

View full text Add to dashboard Cite

FeCo thin films with high saturation magnetization (4 pMs) can be applied in high-frequency electronic devices such as thin film inductors and microwave noise suppressors. However, due to its large magnetocrystalline anisotropy constant and magnetostrictive coefficient of FeCo, the coercivity (Hc) of FeCo films is generally high, which is detrimental to the soft magnetic properties. Meanwhile, the thickness and deposition temperature have significant effects on the coercivity and saturation magnetization of FeCo films. In this paper, FeCo thin films with different thicknesses were prepared by magnetron sputtering at different temperatures. The effects of thickness and deposition temperature on the microstructure and magnetic properties of FeCo thin films were systematically studied. When the film thickness increases from 50 nm to 800 nm, the coercivity would decrease from 309 Oe to 160 Oe. However, the saturation magnetization decreases from 22.1 kG to 15.3 kG. After that, we try to further increase the deposition temperature from room temperature (RT) to 475 °C. It is intriguing to find that the coercivity greatly decreased from 160 Oe to 3 Oe (decreased by 98%), and the saturation magnetization increased from 15.3 kG to 23.5 kG (increased by 53%) for the film with thickness of 800 nm. For the film with thickness of 50 nm, the coercivity also greatly decreased from 309 Oe to 10 Oe (decreased by 96%), but the saturation magnetization did not change significantly. It is contributed to the increase of deposition temperature, which will lead to the increase of grain size and the decrease of the number of grain boundaries. And the coercivity decreases as the number of grain boundaries decreases. Meanwhile, for the thicker films, when increasing the deposition temperature the thermal stress increases, which changes the appearance of (200) texture, and the saturation magnetization increases. Whereas, it has a negligible effect on the orientation of thin films with small thickness (50 nm). This indicates that high-temperature deposition is beneficial to the soft magnetic properties of FeCo thin films, particularly for the films with larger thickness. This FeCo thin film with high saturation magnetization and low coercivity could be an ideal candidate for high-frequency electronic devices.

show abstract

Near-zero magnetostriction in magnetostrictive FeCo alloys

et al. 2021

View full text Add to dashboard Cite

The thickness and growth temperature dependences of soft magnetic properties and an effective damping parameter of (FeCo)-Si alloy thin films

Cited by 4 publications

References 4 publications

Thickness dependence of dynamic magnetic properties of soft (FeCo)-Si alloy thin films

Thickness dependence of dynamic magnetic properties of soft (FeCo)-Si alloy thin films

The Preparation of High Saturation Magnetization and Low Coercivity Feco Soft Magnetic Thin Films via Controlling the Thickness and Deposition Temperature

Near-zero magnetostriction in magnetostrictive FeCo alloys

Contact Info

Product

Resources

About