Micromagnetism of MnBi:FeCo thin films

T. H. Rana; P. Manchanda; B. Balamurugan; A. Kashyap; T. R. Gao; I. Takeuchi; J. Cun; S. Biswas; R. F. Sabirianov; D. J. Sellmyer; R. Skomski

doi:10.1088/0022-3727/49/7/075003

Micromagnetism of MnBi:FeCo thin films

T. H. Rana, P. Manchanda, B. Balamurugan, A. Kashyap, T. R. Gao, I. Takeuchi, J. Cun, S. Biswas, R. F. Sabirianov, D. J. Sellmyer, R. Skomski

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

7 Scopus citations

Abstract

MnBi:FeCo hard-soft bilayers are investigated using micromagnetic simulations with open boundary conditions and two-dimensional (2D) periodic boundary conditions (PBC). Open and PBC yield similar coercivities of about 1.01 T, in agreement with experiment, but the hysteresis-loop shape is very different in the two theoretical approaches. The difference is ascribed to edge effects, which occur in open boundary conditions but not in PBC and experiment. Near the nucleation field, a curling or vortex mode develops in dots with circular cross sections. The curling mode, which is caused by magnetostatic self-interaction, does not negatively affect the high coercivity of 1.01 T. The magnetostatic self-interaction contributes to the favorable second-quadrant behavior of the MnBi:FeCo thin films.

Original language	English (US)
Article number	075003
Journal	Journal of Physics D: Applied Physics
Volume	49
Issue number	7
DOIs	https://doi.org/10.1088/0022-3727/49/7/075003
State	Published - Jan 28 2016

Keywords

coercivity
exchanged coupled hard-soft bilayer
hysteresis loop
micromagnetic
periodic boundary condition

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Acoustics and Ultrasonics
Surfaces, Coatings and Films

Access to Document

10.1088/0022-3727/49/7/075003

Cite this

@article{7325c89468ce4abe96b29b7b69399a71,

title = "Micromagnetism of MnBi:FeCo thin films",

abstract = "MnBi:FeCo hard-soft bilayers are investigated using micromagnetic simulations with open boundary conditions and two-dimensional (2D) periodic boundary conditions (PBC). Open and PBC yield similar coercivities of about 1.01 T, in agreement with experiment, but the hysteresis-loop shape is very different in the two theoretical approaches. The difference is ascribed to edge effects, which occur in open boundary conditions but not in PBC and experiment. Near the nucleation field, a curling or vortex mode develops in dots with circular cross sections. The curling mode, which is caused by magnetostatic self-interaction, does not negatively affect the high coercivity of 1.01 T. The magnetostatic self-interaction contributes to the favorable second-quadrant behavior of the MnBi:FeCo thin films.",

keywords = "coercivity, exchanged coupled hard-soft bilayer, hysteresis loop, micromagnetic, periodic boundary condition",

author = "Rana, {T. H.} and P. Manchanda and B. Balamurugan and A. Kashyap and Gao, {T. R.} and I. Takeuchi and J. Cun and S. Biswas and Sabirianov, {R. F.} and Sellmyer, {D. J.} and R. Skomski",

note = "Publisher Copyright: {\textcopyright} 2016 IOP Publishing Ltd.",

year = "2016",

month = jan,

day = "28",

doi = "10.1088/0022-3727/49/7/075003",

language = "English (US)",

volume = "49",

journal = "Journal of Physics D: Applied Physics",

issn = "0022-3727",

publisher = "Institute of Physics",

number = "7",

}

TY - JOUR

T1 - Micromagnetism of MnBi:FeCo thin films

AU - Rana, T. H.

AU - Manchanda, P.

AU - Balamurugan, B.

AU - Kashyap, A.

AU - Gao, T. R.

AU - Takeuchi, I.

AU - Cun, J.

AU - Biswas, S.

AU - Sabirianov, R. F.

AU - Sellmyer, D. J.

AU - Skomski, R.

PY - 2016/1/28

Y1 - 2016/1/28

N2 - MnBi:FeCo hard-soft bilayers are investigated using micromagnetic simulations with open boundary conditions and two-dimensional (2D) periodic boundary conditions (PBC). Open and PBC yield similar coercivities of about 1.01 T, in agreement with experiment, but the hysteresis-loop shape is very different in the two theoretical approaches. The difference is ascribed to edge effects, which occur in open boundary conditions but not in PBC and experiment. Near the nucleation field, a curling or vortex mode develops in dots with circular cross sections. The curling mode, which is caused by magnetostatic self-interaction, does not negatively affect the high coercivity of 1.01 T. The magnetostatic self-interaction contributes to the favorable second-quadrant behavior of the MnBi:FeCo thin films.

AB - MnBi:FeCo hard-soft bilayers are investigated using micromagnetic simulations with open boundary conditions and two-dimensional (2D) periodic boundary conditions (PBC). Open and PBC yield similar coercivities of about 1.01 T, in agreement with experiment, but the hysteresis-loop shape is very different in the two theoretical approaches. The difference is ascribed to edge effects, which occur in open boundary conditions but not in PBC and experiment. Near the nucleation field, a curling or vortex mode develops in dots with circular cross sections. The curling mode, which is caused by magnetostatic self-interaction, does not negatively affect the high coercivity of 1.01 T. The magnetostatic self-interaction contributes to the favorable second-quadrant behavior of the MnBi:FeCo thin films.

KW - coercivity

KW - exchanged coupled hard-soft bilayer

KW - hysteresis loop

KW - micromagnetic

KW - periodic boundary condition

UR - http://www.scopus.com/inward/record.url?scp=84957595666&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84957595666&partnerID=8YFLogxK

U2 - 10.1088/0022-3727/49/7/075003

DO - 10.1088/0022-3727/49/7/075003

M3 - Article

AN - SCOPUS:84957595666

SN - 0022-3727

VL - 49

JO - Journal of Physics D: Applied Physics

JF - Journal of Physics D: Applied Physics

IS - 7

M1 - 075003

ER -

Micromagnetism of MnBi:FeCo thin films

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this