Exchange coupled composite media for heat assisted magnetic recording

Zengyuan Liu; R. H. Victora

doi:10.1063/1.4978461

Exchange coupled composite media for heat assisted magnetic recording

Zengyuan Liu, R. H. Victora

Electrical and Computer Engineering

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

6 Scopus citations

Abstract

Micromagnetic simulation is used to calculate the temperature derivative of the switching field dH_sw/dT for a composite media with a superparamagnetic writing layer. The results show that dH_sw/dT is reduced for a defined probability of switching, and switching field line width remains almost unchanged. An analytical two-spin model is established to relate exchange coupling between the two layers J_ex to energy barrier and the switching probability distribution (SPD). Both the analytical model and micro-magnetic simulation show that the full-width half-maximum FWHM∝(J_ex)^−0.5 and writing temperature T_sw∝(J_ex)⁻¹. It is also found that the writing layer leads the storage layer during switching.

Original language	English (US)
Article number	056516
Journal	AIP Advances
Volume	7
Issue number	5
DOIs	https://doi.org/10.1063/1.4978461
State	Published - May 1 2017

Bibliographical note

Publisher Copyright:
© 2017 Author(s).

Publisher link

10.1063/1.4978461

Find It

Find It at U of M Libraries

Cite this

@article{20fecea9acbe4c2ea826fe8374a38ca8,

title = "Exchange coupled composite media for heat assisted magnetic recording",

abstract = "Micromagnetic simulation is used to calculate the temperature derivative of the switching field dHsw/dT for a composite media with a superparamagnetic writing layer. The results show that dHsw/dT is reduced for a defined probability of switching, and switching field line width remains almost unchanged. An analytical two-spin model is established to relate exchange coupling between the two layers Jex to energy barrier and the switching probability distribution (SPD). Both the analytical model and micro-magnetic simulation show that the full-width half-maximum FWHM∝(Jex)−0.5 and writing temperature Tsw∝(Jex)−1. It is also found that the writing layer leads the storage layer during switching.",

author = "Zengyuan Liu and Victora, {R. H.}",

note = "Publisher Copyright: {\textcopyright} 2017 Author(s).",

year = "2017",

month = may,

day = "1",

doi = "10.1063/1.4978461",

language = "English (US)",

volume = "7",

journal = "AIP Advances",

issn = "2158-3226",

publisher = "American Institute of Physics Publising LLC",

number = "5",

}

TY - JOUR

T1 - Exchange coupled composite media for heat assisted magnetic recording

AU - Liu, Zengyuan

AU - Victora, R. H.

PY - 2017/5/1

Y1 - 2017/5/1

N2 - Micromagnetic simulation is used to calculate the temperature derivative of the switching field dHsw/dT for a composite media with a superparamagnetic writing layer. The results show that dHsw/dT is reduced for a defined probability of switching, and switching field line width remains almost unchanged. An analytical two-spin model is established to relate exchange coupling between the two layers Jex to energy barrier and the switching probability distribution (SPD). Both the analytical model and micro-magnetic simulation show that the full-width half-maximum FWHM∝(Jex)−0.5 and writing temperature Tsw∝(Jex)−1. It is also found that the writing layer leads the storage layer during switching.

AB - Micromagnetic simulation is used to calculate the temperature derivative of the switching field dHsw/dT for a composite media with a superparamagnetic writing layer. The results show that dHsw/dT is reduced for a defined probability of switching, and switching field line width remains almost unchanged. An analytical two-spin model is established to relate exchange coupling between the two layers Jex to energy barrier and the switching probability distribution (SPD). Both the analytical model and micro-magnetic simulation show that the full-width half-maximum FWHM∝(Jex)−0.5 and writing temperature Tsw∝(Jex)−1. It is also found that the writing layer leads the storage layer during switching.

UR - http://www.scopus.com/inward/record.url?scp=85015292815&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85015292815&partnerID=8YFLogxK

U2 - 10.1063/1.4978461

DO - 10.1063/1.4978461

M3 - Article

AN - SCOPUS:85015292815

SN - 2158-3226

VL - 7

JO - AIP Advances

JF - AIP Advances

IS - 5

M1 - 056516

ER -

Exchange coupled composite media for heat assisted magnetic recording

Abstract

Bibliographical note

Publisher link

Find It

Other files and links

Fingerprint

Cite this