FMR, magnetization, and dynamic coercivity studies of anisotropy in CoCrPtB recording media

T Thomson; C J Oates; G M Smith; P C Riedi

doi:10.1109/tmag.2006.878674

FMR, magnetization, and dynamic coercivity studies of anisotropy in CoCrPtB recording media

T Thomson, C J Oates, G M Smith, P C Riedi

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

Abstract

Methods to determine magnetic anisotropy in materials with a 2D inplane distribution of anisotropy axes are compared. We show that high field ferromagnetic resonance (FMR) and the Miyajima method give identical results providing the later is analyzed correctly. Extrapolation of the time dependence of coercivity using Sharrock's equation gives lower anisotropy values and this is shown to be due both to extrapolation errors and the effect of interactions. Additionally, the inhomogeneous broadening of the FMR line provides information on the effective distribution of anisotropy which we correlated with recording performance for a series of CoCrPtB media as a function of boron content.

Original language	English
Pages (from-to)	2405-2407
Number of pages	3
Journal	Ieee Transactions on Magnetics
Volume	42
Issue number	10
DOIs	https://doi.org/10.1109/tmag.2006.878674
Publication status	Published - 2006

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10.1109/tmag.2006.878674

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title = "FMR, magnetization, and dynamic coercivity studies of anisotropy in CoCrPtB recording media",

abstract = "Methods to determine magnetic anisotropy in materials with a 2D inplane distribution of anisotropy axes are compared. We show that high field ferromagnetic resonance (FMR) and the Miyajima method give identical results providing the later is analyzed correctly. Extrapolation of the time dependence of coercivity using Sharrock's equation gives lower anisotropy values and this is shown to be due both to extrapolation errors and the effect of interactions. Additionally, the inhomogeneous broadening of the FMR line provides information on the effective distribution of anisotropy which we correlated with recording performance for a series of CoCrPtB media as a function of boron content.",

author = "T Thomson and Oates, {C J} and Smith, {G M} and Riedi, {P C}",

note = "Thomson, Thomas Oates, Colin J. Smith, Graham M. Riedi, Peter C. 41st IEEE International Magnetics Conference (Intermag 2006) May 08-12, 2006 San Diego, CA Ieee",

year = "2006",

doi = "10.1109/tmag.2006.878674",

language = "English",

volume = "42",

pages = "2405--2407",

journal = "Ieee Transactions on Magnetics",

issn = "0018-9464",

publisher = "IEEE",

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T1 - FMR, magnetization, and dynamic coercivity studies of anisotropy in CoCrPtB recording media

AU - Thomson, T

AU - Oates, C J

AU - Smith, G M

AU - Riedi, P C

N1 - Thomson, Thomas Oates, Colin J. Smith, Graham M. Riedi, Peter C. 41st IEEE International Magnetics Conference (Intermag 2006) May 08-12, 2006 San Diego, CA Ieee

PY - 2006

Y1 - 2006

N2 - Methods to determine magnetic anisotropy in materials with a 2D inplane distribution of anisotropy axes are compared. We show that high field ferromagnetic resonance (FMR) and the Miyajima method give identical results providing the later is analyzed correctly. Extrapolation of the time dependence of coercivity using Sharrock's equation gives lower anisotropy values and this is shown to be due both to extrapolation errors and the effect of interactions. Additionally, the inhomogeneous broadening of the FMR line provides information on the effective distribution of anisotropy which we correlated with recording performance for a series of CoCrPtB media as a function of boron content.

AB - Methods to determine magnetic anisotropy in materials with a 2D inplane distribution of anisotropy axes are compared. We show that high field ferromagnetic resonance (FMR) and the Miyajima method give identical results providing the later is analyzed correctly. Extrapolation of the time dependence of coercivity using Sharrock's equation gives lower anisotropy values and this is shown to be due both to extrapolation errors and the effect of interactions. Additionally, the inhomogeneous broadening of the FMR line provides information on the effective distribution of anisotropy which we correlated with recording performance for a series of CoCrPtB media as a function of boron content.

U2 - 10.1109/tmag.2006.878674

DO - 10.1109/tmag.2006.878674

M3 - Article

SN - 0018-9464

VL - 42

SP - 2405

EP - 2407

JO - Ieee Transactions on Magnetics

JF - Ieee Transactions on Magnetics

IS - 10

ER -

FMR, magnetization, and dynamic coercivity studies of anisotropy in CoCrPtB recording media

Abstract

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