Engineering Gilbert damping by dilute Gd doping in soft magnetic Fe thin Films

W. Zhang, S. Jiang, P.K.J. Wong, Li Sun, Y.K. Wang, Kai Wang, Machiel Pieter de Jong, Wilfred Gerard van der Wiel, G. van der Laan, Y. Zhai

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

By analyzing the ferromagnetic resonance linewidth, we show that the Gilbert damping constant in soft magnetic Fe thin films can be enhanced by ∼6 times with Gd doping of up to 20%. At the same time, the magnetic easy axis remains in the film plane while the coercivity is strongly reduced after Gd inclusion. X-ray magnetic circular dichroism measurements reveal a strong increase in the orbital-to-spin moment ratio of Fe with increasing Gd concentration, in full agreement with the increase in the Gilbert damping obtained for these thin films. Combined with x-ray diffraction and vibrating sample magnetometry, the results demonstrate that the FeGd thin films with dilute Gd doping of up to 20% are promising candidates for spin-transfer-torque applications in soft magnetic devices, in which an enhanced damping is required.
Original languageUndefined
Pages (from-to)17A308
Number of pages3
JournalJournal of applied physics
Volume115
Issue number17
DOIs
Publication statusPublished - 7 May 2014

Keywords

  • EWI-25379
  • IR-93017
  • METIS-309698

Cite this

Zhang, W., Jiang, S., Wong, P. K. J., Sun, L., Wang, Y. K., Wang, K., ... Zhai, Y. (2014). Engineering Gilbert damping by dilute Gd doping in soft magnetic Fe thin Films. Journal of applied physics, 115(17), 17A308. https://doi.org/10.1063/1.4862091
Zhang, W. ; Jiang, S. ; Wong, P.K.J. ; Sun, Li ; Wang, Y.K. ; Wang, Kai ; de Jong, Machiel Pieter ; van der Wiel, Wilfred Gerard ; van der Laan, G. ; Zhai, Y. / Engineering Gilbert damping by dilute Gd doping in soft magnetic Fe thin Films. In: Journal of applied physics. 2014 ; Vol. 115, No. 17. pp. 17A308.
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title = "Engineering Gilbert damping by dilute Gd doping in soft magnetic Fe thin Films",
abstract = "By analyzing the ferromagnetic resonance linewidth, we show that the Gilbert damping constant in soft magnetic Fe thin films can be enhanced by ∼6 times with Gd doping of up to 20{\%}. At the same time, the magnetic easy axis remains in the film plane while the coercivity is strongly reduced after Gd inclusion. X-ray magnetic circular dichroism measurements reveal a strong increase in the orbital-to-spin moment ratio of Fe with increasing Gd concentration, in full agreement with the increase in the Gilbert damping obtained for these thin films. Combined with x-ray diffraction and vibrating sample magnetometry, the results demonstrate that the FeGd thin films with dilute Gd doping of up to 20{\%} are promising candidates for spin-transfer-torque applications in soft magnetic devices, in which an enhanced damping is required.",
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author = "W. Zhang and S. Jiang and P.K.J. Wong and Li Sun and Y.K. Wang and Kai Wang and {de Jong}, {Machiel Pieter} and {van der Wiel}, {Wilfred Gerard} and {van der Laan}, G. and Y. Zhai",
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Zhang, W, Jiang, S, Wong, PKJ, Sun, L, Wang, YK, Wang, K, de Jong, MP, van der Wiel, WG, van der Laan, G & Zhai, Y 2014, 'Engineering Gilbert damping by dilute Gd doping in soft magnetic Fe thin Films' Journal of applied physics, vol. 115, no. 17, pp. 17A308. https://doi.org/10.1063/1.4862091

Engineering Gilbert damping by dilute Gd doping in soft magnetic Fe thin Films. / Zhang, W.; Jiang, S.; Wong, P.K.J.; Sun, Li; Wang, Y.K.; Wang, Kai; de Jong, Machiel Pieter; van der Wiel, Wilfred Gerard; van der Laan, G.; Zhai, Y.

In: Journal of applied physics, Vol. 115, No. 17, 07.05.2014, p. 17A308.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Engineering Gilbert damping by dilute Gd doping in soft magnetic Fe thin Films

AU - Zhang, W.

AU - Jiang, S.

AU - Wong, P.K.J.

AU - Sun, Li

AU - Wang, Y.K.

AU - Wang, Kai

AU - de Jong, Machiel Pieter

AU - van der Wiel, Wilfred Gerard

AU - van der Laan, G.

AU - Zhai, Y.

N1 - eemcs-eprint-25379

PY - 2014/5/7

Y1 - 2014/5/7

N2 - By analyzing the ferromagnetic resonance linewidth, we show that the Gilbert damping constant in soft magnetic Fe thin films can be enhanced by ∼6 times with Gd doping of up to 20%. At the same time, the magnetic easy axis remains in the film plane while the coercivity is strongly reduced after Gd inclusion. X-ray magnetic circular dichroism measurements reveal a strong increase in the orbital-to-spin moment ratio of Fe with increasing Gd concentration, in full agreement with the increase in the Gilbert damping obtained for these thin films. Combined with x-ray diffraction and vibrating sample magnetometry, the results demonstrate that the FeGd thin films with dilute Gd doping of up to 20% are promising candidates for spin-transfer-torque applications in soft magnetic devices, in which an enhanced damping is required.

AB - By analyzing the ferromagnetic resonance linewidth, we show that the Gilbert damping constant in soft magnetic Fe thin films can be enhanced by ∼6 times with Gd doping of up to 20%. At the same time, the magnetic easy axis remains in the film plane while the coercivity is strongly reduced after Gd inclusion. X-ray magnetic circular dichroism measurements reveal a strong increase in the orbital-to-spin moment ratio of Fe with increasing Gd concentration, in full agreement with the increase in the Gilbert damping obtained for these thin films. Combined with x-ray diffraction and vibrating sample magnetometry, the results demonstrate that the FeGd thin films with dilute Gd doping of up to 20% are promising candidates for spin-transfer-torque applications in soft magnetic devices, in which an enhanced damping is required.

KW - EWI-25379

KW - IR-93017

KW - METIS-309698

U2 - 10.1063/1.4862091

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