Thermal switching field distribution of a single domain particle for field-dependent attempt frequency

L. Breth; D. Suess; C. Vogler; B. Bergmair; M. Fuger; R. Heer; H. Brueckl

doi:10.1063/1.4737413

Thermal switching field distribution of a single domain particle for field-dependent attempt frequency

L. Breth, D. Suess, C. Vogler, B. Bergmair, M. Fuger, R. Heer, H. Brueckl

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

Abstract

We present an analytical derivation of the switching field distribution (SFD) at finite temperature for a single domain particle from the Néel-Brown model in the presence of a linearly swept magnetic field. By considering the field dependence of the attempt frequency f 0 in the rate equation, we find enhancement of coercivity compared to models using constant f 0. The contribution of thermal fluctuations to the standard deviation of the switching field H C derived here reaches values of 10 H C. Considering this contribution, which has been neglected in previous work, is important for the correct interpretation of measurements of switching field distributions. © 2012 American Institute of Physics.

Original language	English
Journal	Journal of Applied Physics
Volume	112
Issue number	2
DOIs	https://doi.org/10.1063/1.4737413
Publication status	Published - 2012
Externally published	Yes

Keywords

Field dependence
Finite temperatures
Rate equations
Single domain particles
Standard deviation
Switching field
Switching field distribution
Thermal fluctuations
Thermal switching
Physical properties
Physics
Switching

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10.1063/1.4737413

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title = "Thermal switching field distribution of a single domain particle for field-dependent attempt frequency",

abstract = "We present an analytical derivation of the switching field distribution (SFD) at finite temperature for a single domain particle from the N{\'e}el-Brown model in the presence of a linearly swept magnetic field. By considering the field dependence of the attempt frequency f 0 in the rate equation, we find enhancement of coercivity compared to models using constant f 0. The contribution of thermal fluctuations to the standard deviation of the switching field H C derived here reaches values of 10 H C. Considering this contribution, which has been neglected in previous work, is important for the correct interpretation of measurements of switching field distributions. {\textcopyright} 2012 American Institute of Physics.",

keywords = "Field dependence, Finite temperatures, Rate equations, Single domain particles, Standard deviation, Switching field, Switching field distribution, Thermal fluctuations, Thermal switching, Physical properties, Physics, Switching",

author = "L. Breth and D. Suess and C. Vogler and B. Bergmair and M. Fuger and R. Heer and H. Brueckl",

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language = "English",

volume = "112",

number = "2",

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TY - JOUR

T1 - Thermal switching field distribution of a single domain particle for field-dependent attempt frequency

AU - Breth, L.

AU - Suess, D.

AU - Vogler, C.

AU - Bergmair, B.

AU - Fuger, M.

AU - Heer, R.

AU - Brueckl, H.

N1 - cited By 17

PY - 2012

Y1 - 2012

N2 - We present an analytical derivation of the switching field distribution (SFD) at finite temperature for a single domain particle from the Néel-Brown model in the presence of a linearly swept magnetic field. By considering the field dependence of the attempt frequency f 0 in the rate equation, we find enhancement of coercivity compared to models using constant f 0. The contribution of thermal fluctuations to the standard deviation of the switching field H C derived here reaches values of 10 H C. Considering this contribution, which has been neglected in previous work, is important for the correct interpretation of measurements of switching field distributions. © 2012 American Institute of Physics.

AB - We present an analytical derivation of the switching field distribution (SFD) at finite temperature for a single domain particle from the Néel-Brown model in the presence of a linearly swept magnetic field. By considering the field dependence of the attempt frequency f 0 in the rate equation, we find enhancement of coercivity compared to models using constant f 0. The contribution of thermal fluctuations to the standard deviation of the switching field H C derived here reaches values of 10 H C. Considering this contribution, which has been neglected in previous work, is important for the correct interpretation of measurements of switching field distributions. © 2012 American Institute of Physics.

KW - Field dependence

KW - Finite temperatures

KW - Rate equations

KW - Single domain particles

KW - Standard deviation

KW - Switching field

KW - Switching field distribution

KW - Thermal fluctuations

KW - Thermal switching

KW - Physical properties

KW - Physics

KW - Switching

U2 - 10.1063/1.4737413

DO - 10.1063/1.4737413

M3 - Article

SN - 0021-8979

VL - 112

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 2

ER -

Thermal switching field distribution of a single domain particle for field-dependent attempt frequency

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Keywords

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