Brillouin light scattering study of the magnetic anisotropy in bcc-Fe(100) ultrathin films grown on GaAs(100) surfaces with different reconstructions

Seung Seok Ha; Nam Hee Kim; Chun Yeol You; Sukmock Lee; Kenta Ohta; Takuto Maruyama; Katsunori Konishi; Takayuki Nozaki; Yoshishige Suzuki; Willem Van Roy

doi:10.1109/TMAG.2009.2018659

Brillouin light scattering study of the magnetic anisotropy in bcc-Fe(100) ultrathin films grown on GaAs(100) surfaces with different reconstructions

Seung Seok Ha
, Nam Hee Kim
, Chun Yeol You
, Sukmock Lee
, Kenta Ohta
, Takuto Maruyama
, Katsunori Konishi
, Takayuki Nozaki
, Yoshishige Suzuki
, Willem Van Roy

Department of Physics and Chemistry

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

We investigated the magnetic anisotropy of ultrathin bcc-Fe (001) films with a fcc-Au(001) cover layer, grown onto GaAs (001) (4 × 1) and (2 × 6)/(3 × 6) reconstructed surfaces. The magneto-optical Kerr effect hysteresis loops revealed existence of a strong in-plane uniaxial magnetic anisotropy in the Fe films grown on both the surfaces. Details of the in-plane uniaxial anisotropy (K_U), cubic anisotropy (K_C), and effective demagnetization field (47πM_eff ) were studied by Brillouin light scattering method. We observed a stronger reduction of K _U, K_C , and 4πM_eff in thinner Fe layers (below 1.3 nm) grown on both the surfaces. In the case of Fe films grown on GaAs (4 × 1) surface, anisotropies observed were smaller than that for the (2 × 6)/(3 × 6) surface. This reflects the role of surface structure in determining the magnetic anisotropies.

Original language	English
Article number	4957701
Pages (from-to)	2527-2530
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	45
Issue number	6
DOIs	https://doi.org/10.1109/TMAG.2009.2018659
State	Published - Jun 2009

Bibliographical note

Funding Information:
ACKNOWLEDGMENT This work is partially supported by KOSEF (Basic Research Program No. R01-2007-000-20281-0). We acknowledge Mr. S. Degroote and Mr. W. van de Graaf of IMEC for preparation of the GaAs layers and Dr. Ashwin A. Tulapurkar for valuable discussions.

Keywords

Brillouin light scattering
GaAs reconstruction
Magnetic anisotropy
Spin waves

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10.1109/TMAG.2009.2018659

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Ha, S. S., Kim, N. H., You, C. Y., Lee, S., Ohta, K., Maruyama, T., Konishi, K., Nozaki, T., Suzuki, Y., & Van Roy, W. (2009). Brillouin light scattering study of the magnetic anisotropy in bcc-Fe(100) ultrathin films grown on GaAs(100) surfaces with different reconstructions. IEEE Transactions on Magnetics, 45(6), 2527-2530. Article 4957701. https://doi.org/10.1109/TMAG.2009.2018659

@article{3bddd47473664071a9f21d0d82d38aa2,

title = "Brillouin light scattering study of the magnetic anisotropy in bcc-Fe(100) ultrathin films grown on GaAs(100) surfaces with different reconstructions",

abstract = "We investigated the magnetic anisotropy of ultrathin bcc-Fe (001) films with a fcc-Au(001) cover layer, grown onto GaAs (001) (4 × 1) and (2 × 6)/(3 × 6) reconstructed surfaces. The magneto-optical Kerr effect hysteresis loops revealed existence of a strong in-plane uniaxial magnetic anisotropy in the Fe films grown on both the surfaces. Details of the in-plane uniaxial anisotropy (KU), cubic anisotropy (KC), and effective demagnetization field (47πMeff ) were studied by Brillouin light scattering method. We observed a stronger reduction of K U, KC , and 4πMeff in thinner Fe layers (below 1.3 nm) grown on both the surfaces. In the case of Fe films grown on GaAs (4 × 1) surface, anisotropies observed were smaller than that for the (2 × 6)/(3 × 6) surface. This reflects the role of surface structure in determining the magnetic anisotropies.",

keywords = "Brillouin light scattering, GaAs reconstruction, Magnetic anisotropy, Spin waves",

author = "Ha, \{Seung Seok\} and Kim, \{Nam Hee\} and You, \{Chun Yeol\} and Sukmock Lee and Kenta Ohta and Takuto Maruyama and Katsunori Konishi and Takayuki Nozaki and Yoshishige Suzuki and \{Van Roy\}, Willem",

note = "Funding Information: ACKNOWLEDGMENT This work is partially supported by KOSEF (Basic Research Program No. R01-2007-000-20281-0). We acknowledge Mr. S. Degroote and Mr. W. van de Graaf of IMEC for preparation of the GaAs layers and Dr. Ashwin A. Tulapurkar for valuable discussions.",

year = "2009",

month = jun,

doi = "10.1109/TMAG.2009.2018659",

language = "English",

volume = "45",

pages = "2527--2530",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "6",

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Ha, SS, Kim, NH, You, CY, Lee, S, Ohta, K, Maruyama, T, Konishi, K, Nozaki, T, Suzuki, Y & Van Roy, W 2009, 'Brillouin light scattering study of the magnetic anisotropy in bcc-Fe(100) ultrathin films grown on GaAs(100) surfaces with different reconstructions', IEEE Transactions on Magnetics, vol. 45, no. 6, 4957701, pp. 2527-2530. https://doi.org/10.1109/TMAG.2009.2018659

TY - JOUR

T1 - Brillouin light scattering study of the magnetic anisotropy in bcc-Fe(100) ultrathin films grown on GaAs(100) surfaces with different reconstructions

AU - Ha, Seung Seok

AU - Kim, Nam Hee

AU - You, Chun Yeol

AU - Lee, Sukmock

AU - Ohta, Kenta

AU - Maruyama, Takuto

AU - Konishi, Katsunori

AU - Nozaki, Takayuki

AU - Suzuki, Yoshishige

AU - Van Roy, Willem

N1 - Funding Information: ACKNOWLEDGMENT This work is partially supported by KOSEF (Basic Research Program No. R01-2007-000-20281-0). We acknowledge Mr. S. Degroote and Mr. W. van de Graaf of IMEC for preparation of the GaAs layers and Dr. Ashwin A. Tulapurkar for valuable discussions.

PY - 2009/6

Y1 - 2009/6

N2 - We investigated the magnetic anisotropy of ultrathin bcc-Fe (001) films with a fcc-Au(001) cover layer, grown onto GaAs (001) (4 × 1) and (2 × 6)/(3 × 6) reconstructed surfaces. The magneto-optical Kerr effect hysteresis loops revealed existence of a strong in-plane uniaxial magnetic anisotropy in the Fe films grown on both the surfaces. Details of the in-plane uniaxial anisotropy (KU), cubic anisotropy (KC), and effective demagnetization field (47πMeff ) were studied by Brillouin light scattering method. We observed a stronger reduction of K U, KC , and 4πMeff in thinner Fe layers (below 1.3 nm) grown on both the surfaces. In the case of Fe films grown on GaAs (4 × 1) surface, anisotropies observed were smaller than that for the (2 × 6)/(3 × 6) surface. This reflects the role of surface structure in determining the magnetic anisotropies.

AB - We investigated the magnetic anisotropy of ultrathin bcc-Fe (001) films with a fcc-Au(001) cover layer, grown onto GaAs (001) (4 × 1) and (2 × 6)/(3 × 6) reconstructed surfaces. The magneto-optical Kerr effect hysteresis loops revealed existence of a strong in-plane uniaxial magnetic anisotropy in the Fe films grown on both the surfaces. Details of the in-plane uniaxial anisotropy (KU), cubic anisotropy (KC), and effective demagnetization field (47πMeff ) were studied by Brillouin light scattering method. We observed a stronger reduction of K U, KC , and 4πMeff in thinner Fe layers (below 1.3 nm) grown on both the surfaces. In the case of Fe films grown on GaAs (4 × 1) surface, anisotropies observed were smaller than that for the (2 × 6)/(3 × 6) surface. This reflects the role of surface structure in determining the magnetic anisotropies.

KW - Brillouin light scattering

KW - GaAs reconstruction

KW - Magnetic anisotropy

KW - Spin waves

UR - https://www.scopus.com/pages/publications/66649087500

U2 - 10.1109/TMAG.2009.2018659

DO - 10.1109/TMAG.2009.2018659

M3 - Article

AN - SCOPUS:66649087500

SN - 0018-9464

VL - 45

SP - 2527

EP - 2530

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 6

M1 - 4957701

ER -

Brillouin light scattering study of the magnetic anisotropy in bcc-Fe(100) ultrathin films grown on GaAs(100) surfaces with different reconstructions

Abstract

Bibliographical note

Keywords

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