Fast magnetization precession for perpendicularly magnetized MnAlGe epitaxial films with atomic layered structures

S. Mizukami; A. Sakuma; T. Kubota; Y. Kondo; A. Sugihara; T. Miyazaki

doi:10.1063/1.4824031

Fast magnetization precession for perpendicularly magnetized MnAlGe epitaxial films with atomic layered structures

S. Mizukami, A. Sakuma, T. Kubota, Y. Kondo, A. Sugihara, T. Miyazaki

Advanced Institute for Materials Research (AIMR)

Tohoku University

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

34 Citations (Scopus)

Abstract

Epitaxial growth and magnetization precessional dynamics for tetragonal MnAlGe films are investigated. The films are grown on MgO (100) with c axis parallel to the film normal and well-ordered layered structures. The film exhibits rectangular hysteresis loop with perpendicular magnetic anisotropy constant of 4.7 Merg/cm³ and saturation magnetization of 250 emu/cm³. Magnetization precession with precession frequency of ∼100 GHz is observed by time-resolved magneto-optical Kerr effect. Further, the Gilbert damping constant is found to be less than ∼0.05, which is much larger than that obtained using the first principles calculations.

Original language	English
Article number	142405
Journal	Applied Physics Letters
Volume	103
Issue number	14
DOIs	https://doi.org/10.1063/1.4824031
Publication status	Published - 2013 Sept 30

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title = "Fast magnetization precession for perpendicularly magnetized MnAlGe epitaxial films with atomic layered structures",

abstract = "Epitaxial growth and magnetization precessional dynamics for tetragonal MnAlGe films are investigated. The films are grown on MgO (100) with c axis parallel to the film normal and well-ordered layered structures. The film exhibits rectangular hysteresis loop with perpendicular magnetic anisotropy constant of 4.7 Merg/cm3 and saturation magnetization of 250 emu/cm3. Magnetization precession with precession frequency of ∼100 GHz is observed by time-resolved magneto-optical Kerr effect. Further, the Gilbert damping constant is found to be less than ∼0.05, which is much larger than that obtained using the first principles calculations.",

author = "S. Mizukami and A. Sakuma and T. Kubota and Y. Kondo and A. Sugihara and T. Miyazaki",

note = "Funding Information: S.M. thanks to Feng Wu for the valuable discussion. This work was partially supported by a Grant-in-Aid for Scientific Research (No. 24686001), the NEDO Development of an Infrastructure for Normally-off Computing Technology project, Fusion Research Grant from WPI-AIMR, and Asahi glass foundation.",

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doi = "10.1063/1.4824031",

language = "English",

volume = "103",

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T1 - Fast magnetization precession for perpendicularly magnetized MnAlGe epitaxial films with atomic layered structures

AU - Mizukami, S.

AU - Sakuma, A.

AU - Kubota, T.

AU - Kondo, Y.

AU - Sugihara, A.

AU - Miyazaki, T.

N1 - Funding Information: S.M. thanks to Feng Wu for the valuable discussion. This work was partially supported by a Grant-in-Aid for Scientific Research (No. 24686001), the NEDO Development of an Infrastructure for Normally-off Computing Technology project, Fusion Research Grant from WPI-AIMR, and Asahi glass foundation.

PY - 2013/9/30

Y1 - 2013/9/30

N2 - Epitaxial growth and magnetization precessional dynamics for tetragonal MnAlGe films are investigated. The films are grown on MgO (100) with c axis parallel to the film normal and well-ordered layered structures. The film exhibits rectangular hysteresis loop with perpendicular magnetic anisotropy constant of 4.7 Merg/cm3 and saturation magnetization of 250 emu/cm3. Magnetization precession with precession frequency of ∼100 GHz is observed by time-resolved magneto-optical Kerr effect. Further, the Gilbert damping constant is found to be less than ∼0.05, which is much larger than that obtained using the first principles calculations.

AB - Epitaxial growth and magnetization precessional dynamics for tetragonal MnAlGe films are investigated. The films are grown on MgO (100) with c axis parallel to the film normal and well-ordered layered structures. The film exhibits rectangular hysteresis loop with perpendicular magnetic anisotropy constant of 4.7 Merg/cm3 and saturation magnetization of 250 emu/cm3. Magnetization precession with precession frequency of ∼100 GHz is observed by time-resolved magneto-optical Kerr effect. Further, the Gilbert damping constant is found to be less than ∼0.05, which is much larger than that obtained using the first principles calculations.

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Fast magnetization precession for perpendicularly magnetized MnAlGe epitaxial films with atomic layered structures

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