Coercivity induced by random field at ferromagnetic and antiferromagnetic interfaces

S. Zhang; D. V. Dimitrov; G. C. Hadjipanayis; J. W. Cai; C. L. Chien

doi:10.1016/S0304-8853(98)01155-X

Coercivity induced by random field at ferromagnetic and antiferromagnetic interfaces

S. Zhang, D. V. Dimitrov, G. C. Hadjipanayis, J. W. Cai, C. L. Chien

Research output: Contribution to journal › Conference article › peer-review

83 Scopus citations

Abstract

In the presence of random fields at an interface between a ferromagnetic and an antiferromagnetic layer, the domain walls in the ferromagnetic layer are pinned by local minimum energy. To move the domain walls, an applied magnetic field must be large enough to overcome statistically fluctuating energy. We have calculated this energy and found that the coercivity can be as large as a few kOe for a thin ferromagnetic layer. It is also found that the coercive field at low temperature scales as 1/t^3/2 where t is the F layer thickness, and the coercive field decreases strongly with temperature.

Original language	English (US)
Pages (from-to)	468-470
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	198
DOIs	https://doi.org/10.1016/S0304-8853(98)01155-X
State	Published - Jun 1 1999
Externally published	Yes
Event	Proceedings of the 1998 3rd International Symposium on Metallic Multilayers (MML-98) - Vancouver, BC, Can Duration: Jun 14 1998 → Jun 19 1998

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1016/S0304-8853(98)01155-X

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title = "Coercivity induced by random field at ferromagnetic and antiferromagnetic interfaces",

abstract = "In the presence of random fields at an interface between a ferromagnetic and an antiferromagnetic layer, the domain walls in the ferromagnetic layer are pinned by local minimum energy. To move the domain walls, an applied magnetic field must be large enough to overcome statistically fluctuating energy. We have calculated this energy and found that the coercivity can be as large as a few kOe for a thin ferromagnetic layer. It is also found that the coercive field at low temperature scales as 1/t3/2 where t is the F layer thickness, and the coercive field decreases strongly with temperature.",

author = "S. Zhang and Dimitrov, {D. V.} and Hadjipanayis, {G. C.} and Cai, {J. W.} and Chien, {C. L.}",

note = "Funding Information: This work is supported by a MURI-ONR grant N00014-96-1-1207 (S.Z.), a grant from NSF DMR-9307676 (D.V.D. and G.C.H.) and NSF MRSEC Program No. 96-32526 (J.W.C. and C.L.C.).; Proceedings of the 1998 3rd International Symposium on Metallic Multilayers (MML-98) ; Conference date: 14-06-1998 Through 19-06-1998",

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doi = "10.1016/S0304-8853(98)01155-X",

language = "English (US)",

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TY - JOUR

T1 - Coercivity induced by random field at ferromagnetic and antiferromagnetic interfaces

AU - Zhang, S.

AU - Dimitrov, D. V.

AU - Hadjipanayis, G. C.

AU - Cai, J. W.

AU - Chien, C. L.

N1 - Funding Information: This work is supported by a MURI-ONR grant N00014-96-1-1207 (S.Z.), a grant from NSF DMR-9307676 (D.V.D. and G.C.H.) and NSF MRSEC Program No. 96-32526 (J.W.C. and C.L.C.).

PY - 1999/6/1

Y1 - 1999/6/1

N2 - In the presence of random fields at an interface between a ferromagnetic and an antiferromagnetic layer, the domain walls in the ferromagnetic layer are pinned by local minimum energy. To move the domain walls, an applied magnetic field must be large enough to overcome statistically fluctuating energy. We have calculated this energy and found that the coercivity can be as large as a few kOe for a thin ferromagnetic layer. It is also found that the coercive field at low temperature scales as 1/t3/2 where t is the F layer thickness, and the coercive field decreases strongly with temperature.

AB - In the presence of random fields at an interface between a ferromagnetic and an antiferromagnetic layer, the domain walls in the ferromagnetic layer are pinned by local minimum energy. To move the domain walls, an applied magnetic field must be large enough to overcome statistically fluctuating energy. We have calculated this energy and found that the coercivity can be as large as a few kOe for a thin ferromagnetic layer. It is also found that the coercive field at low temperature scales as 1/t3/2 where t is the F layer thickness, and the coercive field decreases strongly with temperature.

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U2 - 10.1016/S0304-8853(98)01155-X

DO - 10.1016/S0304-8853(98)01155-X

M3 - Conference article

AN - SCOPUS:0032666592

SN - 0304-8853

VL - 198

SP - 468

EP - 470

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

T2 - Proceedings of the 1998 3rd International Symposium on Metallic Multilayers (MML-98)

Y2 - 14 June 1998 through 19 June 1998

ER -

Coercivity induced by random field at ferromagnetic and antiferromagnetic interfaces

Abstract

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