Magnetic domain formation in ultrathin complex oxide ferromagnetic/antiferromagnetic bilayers

A. D. Bang; F. K. Olsen; S. D. Slöetjes; A. Scholl; S. T. Retterer; C. A.F. Vaz; T. Tybell; E. Folven; J. K. Grepstad

doi:10.1063/1.5047271

Magnetic domain formation in ultrathin complex oxide ferromagnetic/antiferromagnetic bilayers

A. D. Bang, F. K. Olsen, S. D. Slöetjes, A. Scholl, S. T. Retterer, C. A.F. Vaz, T. Tybell, E. Folven, J. K. Grepstad

Center for Nanophase Matls Sciences

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

9 Scopus citations

Abstract

In this study, we report on the magnetic domain formation in ultrathin blanket films and patterned micro- and nanostructures of ferromagnetic (FM) La_0.7Sr_0.3MnO₃ single-layers and antiferromagnetic (AF)/ferromagnetic LaFeO₃/La_0.7Sr_0.3MnO₃ bilayers, as investigated by soft x-ray photoemission electron microscopy. In single-layer La_0.7Sr_0.3MnO₃, the domain size is significantly reduced compared to that found in thicker layers, and rectangular micromagnets display metastable multidomain states distinctly different from the flux-closure ground states commonly found in thicker elements. In the LaFeO₃/La_0.7Sr_0.3MnO₃ bilayers, complex multidomain patterns are observed for blanket films and patterned magnets with robust perpendicular (spin-flop) coupling between spins in the AF and FM layers. By thermal cycling of the sample through the La_0.7Sr_0.3MnO₃ Curie temperature, we find that the native antiferromagnetic domain pattern of LaFeO₃ pins the location of domain boundaries in the adjacent La_0.7Sr_0.3MnO₃ layer.

Original language	English
Article number	132402
Journal	Applied Physics Letters
Volume	113
Issue number	13
DOIs	https://doi.org/10.1063/1.5047271
State	Published - Sep 24 2018

Funding

This research was undertaken with financial support from the Research Council of Norway under Grant No. 231290. Funding was also obtained from the Norwegian PhD Network on Nanotechnology for Microsystems (A.D.B.), which is sponsored by the Research Council of Norway, Division for Science, under Contract No. 221860/ F60. X-PEEM measurements were carried out in part on beamline 11.0.1.1, the Advanced Light Source, Lawrence Berkeley National Laboratory, and in part on the SIM beamline, the Swiss Light Source, Paul Scherrer Institute, Villigen. The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, and the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. Nanoscale patterning was carried out at the Center for Nanophase Materials Sciences, which is a U.S. DOE Office of Science User Facility. This research was undertaken with financial support from the Research Council of Norway under Grant No. 231290. Funding was also obtained from the Norwegian PhD Network on Nanotechnology for Microsystems (A.D.B.), which is sponsored by the Research Council of Norway, Division for Science, under Contract No. 221860/F60. X-PEEM measurements were carried out in part on beamline 11.0.1.1, the Advanced Light Source, Lawrence Berkeley National Laboratory, and in part on the SIM beamline, the Swiss Light Source, Paul Scherrer Institute, Villigen. The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, and the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. Nanoscale patterning was carried out at the Center for Nanophase Materials Sciences, which is a U.S. DOE Office of Science User Facility.

Funders	Funder number
A.D.B.
Division for Science	221860/ F60
U.S. Department of Energy	DE-AC02-05CH11231
Office of Science
Basic Energy Sciences
Lawrence Berkeley National Laboratory
The Research Council of Norway	231290

Access to Document

10.1063/1.5047271

Cite this

@article{a53d2b08f1d145e19596815bd088ff4e,

title = "Magnetic domain formation in ultrathin complex oxide ferromagnetic/antiferromagnetic bilayers",

abstract = "In this study, we report on the magnetic domain formation in ultrathin blanket films and patterned micro- and nanostructures of ferromagnetic (FM) La0.7Sr0.3MnO3 single-layers and antiferromagnetic (AF)/ferromagnetic LaFeO3/La0.7Sr0.3MnO3 bilayers, as investigated by soft x-ray photoemission electron microscopy. In single-layer La0.7Sr0.3MnO3, the domain size is significantly reduced compared to that found in thicker layers, and rectangular micromagnets display metastable multidomain states distinctly different from the flux-closure ground states commonly found in thicker elements. In the LaFeO3/La0.7Sr0.3MnO3 bilayers, complex multidomain patterns are observed for blanket films and patterned magnets with robust perpendicular (spin-flop) coupling between spins in the AF and FM layers. By thermal cycling of the sample through the La0.7Sr0.3MnO3 Curie temperature, we find that the native antiferromagnetic domain pattern of LaFeO3 pins the location of domain boundaries in the adjacent La0.7Sr0.3MnO3 layer.",

author = "Bang, {A. D.} and Olsen, {F. K.} and Sl{\"o}etjes, {S. D.} and A. Scholl and Retterer, {S. T.} and Vaz, {C. A.F.} and T. Tybell and E. Folven and Grepstad, {J. K.}",

note = "Publisher Copyright: {\textcopyright} 2018 Author(s).",

year = "2018",

month = sep,

day = "24",

doi = "10.1063/1.5047271",

language = "English",

volume = "113",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "13",

}

TY - JOUR

T1 - Magnetic domain formation in ultrathin complex oxide ferromagnetic/antiferromagnetic bilayers

AU - Bang, A. D.

AU - Olsen, F. K.

AU - Slöetjes, S. D.

AU - Scholl, A.

AU - Retterer, S. T.

AU - Vaz, C. A.F.

AU - Tybell, T.

AU - Folven, E.

AU - Grepstad, J. K.

PY - 2018/9/24

Y1 - 2018/9/24

N2 - In this study, we report on the magnetic domain formation in ultrathin blanket films and patterned micro- and nanostructures of ferromagnetic (FM) La0.7Sr0.3MnO3 single-layers and antiferromagnetic (AF)/ferromagnetic LaFeO3/La0.7Sr0.3MnO3 bilayers, as investigated by soft x-ray photoemission electron microscopy. In single-layer La0.7Sr0.3MnO3, the domain size is significantly reduced compared to that found in thicker layers, and rectangular micromagnets display metastable multidomain states distinctly different from the flux-closure ground states commonly found in thicker elements. In the LaFeO3/La0.7Sr0.3MnO3 bilayers, complex multidomain patterns are observed for blanket films and patterned magnets with robust perpendicular (spin-flop) coupling between spins in the AF and FM layers. By thermal cycling of the sample through the La0.7Sr0.3MnO3 Curie temperature, we find that the native antiferromagnetic domain pattern of LaFeO3 pins the location of domain boundaries in the adjacent La0.7Sr0.3MnO3 layer.

AB - In this study, we report on the magnetic domain formation in ultrathin blanket films and patterned micro- and nanostructures of ferromagnetic (FM) La0.7Sr0.3MnO3 single-layers and antiferromagnetic (AF)/ferromagnetic LaFeO3/La0.7Sr0.3MnO3 bilayers, as investigated by soft x-ray photoemission electron microscopy. In single-layer La0.7Sr0.3MnO3, the domain size is significantly reduced compared to that found in thicker layers, and rectangular micromagnets display metastable multidomain states distinctly different from the flux-closure ground states commonly found in thicker elements. In the LaFeO3/La0.7Sr0.3MnO3 bilayers, complex multidomain patterns are observed for blanket films and patterned magnets with robust perpendicular (spin-flop) coupling between spins in the AF and FM layers. By thermal cycling of the sample through the La0.7Sr0.3MnO3 Curie temperature, we find that the native antiferromagnetic domain pattern of LaFeO3 pins the location of domain boundaries in the adjacent La0.7Sr0.3MnO3 layer.

UR - http://www.scopus.com/inward/record.url?scp=85054142463&partnerID=8YFLogxK

U2 - 10.1063/1.5047271

DO - 10.1063/1.5047271

M3 - Article

AN - SCOPUS:85054142463

SN - 0003-6951

VL - 113

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 13

M1 - 132402

ER -

Magnetic domain formation in ultrathin complex oxide ferromagnetic/antiferromagnetic bilayers

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this