Shape-induced ultrahigh magnetic anisotropy and ferromagnetic resonance frequency of micropatterned thin Permalloy films

Y. Zhuang; M. Vroubel; B. Rejaei; J. N. Burghartz; K. Attenborough

doi:10.1063/1.2162067

Shape-induced ultrahigh magnetic anisotropy and ferromagnetic resonance frequency of micropatterned thin Permalloy films

Y. Zhuang, M. Vroubel, B. Rejaei, J. N. Burghartz, K. Attenborough

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

Abstract

Magnetic anisotropy Hk 200 Oe was observed from bar-shaped Permalloy strips. The film was deposited on sputtered Cr seed layer by electroplating under ∼800 Oe external magnetic field. Tiny degradation of Hk was observed after 30 min postannealing at 400 °C in the absence of external magnetic field. The Permalloy strip with in-plane aspect ratio of 40:1 showed the ferromagnetic resonance at ∼5.3 GHz. The ferromagnetic resonance frequency and magnetic anisotropy decreased to ∼1 GHz and ∼50 Oe, respectively, as the in-plane aspect ratio reduced from 40:1 to 10:1. In comparison, Permalloy strips plated on combined TiTiN seed layers did not show clear anisotropy features.

Original language	English
Article number	08C705
Journal	Journal of Applied Physics
Volume	99
Issue number	8
DOIs	https://doi.org/10.1063/1.2162067
State	Published - 2006
Externally published	Yes

ASJC Scopus Subject Areas

General Physics and Astronomy

Keywords

Crystallization
Magnetic anisotropy
Electromagnetism
Magnetic fields
Ferromagnetic resonance
Alloys
Magnetic hysteresis
Materials properties
Scanning electron microscopy
Thin film deposition

Disciplines

Electrical and Computer Engineering

Access to Document

10.1063/1.2162067

Cite this

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title = "Shape-induced ultrahigh magnetic anisotropy and ferromagnetic resonance frequency of micropatterned thin Permalloy films",

abstract = "Magnetic anisotropy Hk 200 Oe was observed from bar-shaped Permalloy strips. The film was deposited on sputtered Cr seed layer by electroplating under ∼800 Oe external magnetic field. Tiny degradation of Hk was observed after 30 min postannealing at 400 °C in the absence of external magnetic field. The Permalloy strip with in-plane aspect ratio of 40:1 showed the ferromagnetic resonance at ∼5.3 GHz. The ferromagnetic resonance frequency and magnetic anisotropy decreased to ∼1 GHz and ∼50 Oe, respectively, as the in-plane aspect ratio reduced from 40:1 to 10:1. In comparison, Permalloy strips plated on combined TiTiN seed layers did not show clear anisotropy features.",

keywords = "Crystallization, Magnetic anisotropy, Electromagnetism, Magnetic fields, Ferromagnetic resonance, Alloys, Magnetic hysteresis, Materials properties, Scanning electron microscopy, Thin film deposition",

author = "Y. Zhuang and M. Vroubel and B. Rejaei and Burghartz, {J. N.} and K. Attenborough",

year = "2006",

doi = "10.1063/1.2162067",

language = "English",

volume = "99",

journal = "Journal of Applied Physics",

issn = "0021-8979",

number = "8",

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TY - JOUR

T1 - Shape-induced ultrahigh magnetic anisotropy and ferromagnetic resonance frequency of micropatterned thin Permalloy films

AU - Zhuang, Y.

AU - Vroubel, M.

AU - Rejaei, B.

AU - Burghartz, J. N.

AU - Attenborough, K.

PY - 2006

Y1 - 2006

N2 - Magnetic anisotropy Hk 200 Oe was observed from bar-shaped Permalloy strips. The film was deposited on sputtered Cr seed layer by electroplating under ∼800 Oe external magnetic field. Tiny degradation of Hk was observed after 30 min postannealing at 400 °C in the absence of external magnetic field. The Permalloy strip with in-plane aspect ratio of 40:1 showed the ferromagnetic resonance at ∼5.3 GHz. The ferromagnetic resonance frequency and magnetic anisotropy decreased to ∼1 GHz and ∼50 Oe, respectively, as the in-plane aspect ratio reduced from 40:1 to 10:1. In comparison, Permalloy strips plated on combined TiTiN seed layers did not show clear anisotropy features.

AB - Magnetic anisotropy Hk 200 Oe was observed from bar-shaped Permalloy strips. The film was deposited on sputtered Cr seed layer by electroplating under ∼800 Oe external magnetic field. Tiny degradation of Hk was observed after 30 min postannealing at 400 °C in the absence of external magnetic field. The Permalloy strip with in-plane aspect ratio of 40:1 showed the ferromagnetic resonance at ∼5.3 GHz. The ferromagnetic resonance frequency and magnetic anisotropy decreased to ∼1 GHz and ∼50 Oe, respectively, as the in-plane aspect ratio reduced from 40:1 to 10:1. In comparison, Permalloy strips plated on combined TiTiN seed layers did not show clear anisotropy features.

KW - Crystallization

KW - Magnetic anisotropy

KW - Electromagnetism

KW - Magnetic fields

KW - Ferromagnetic resonance

KW - Alloys

KW - Magnetic hysteresis

KW - Materials properties

KW - Scanning electron microscopy

KW - Thin film deposition

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DO - 10.1063/1.2162067

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SN - 0021-8979

VL - 99

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 8

M1 - 08C705

ER -

Shape-induced ultrahigh magnetic anisotropy and ferromagnetic resonance frequency of micropatterned thin Permalloy films

Abstract

ASJC Scopus Subject Areas

Keywords

Disciplines

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