Néel vector reorientation in ferromagnetic/antiferromagnetic complex oxide nanostructures

A. D. Bang; I. Hallsteinsen; F. K. Olsen; S. D. Slöetjes; S. T. Retterer; A. Scholl; E. Arenholz; E. Folven; J. K. Grepstad

doi:10.1063/1.5094604

Néel vector reorientation in ferromagnetic/antiferromagnetic complex oxide nanostructures

A. D. Bang, I. Hallsteinsen, F. K. Olsen, S. D. Slöetjes, S. T. Retterer, A. Scholl, E. Arenholz, E. Folven, J. K. Grepstad

Center for Nanophase Matls Sciences

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

4 Scopus citations

Abstract

In this study, we report on a temperature-driven antiferromagnetic (AF) spin reorientation transition in micro- and nanostructures of AF/ferromagnetic (FM) LaFeO₃/La_0.7Sr_0.3MnO₃ thin film bilayers. Using a combination of x-ray photoemission electron microscopy and x-ray absorption spectroscopy, the Néel vector is shown to reorient 90° as a result of the competition between a shape-imposed anisotropy in the AF layer and interface coupling to the adjacent FM layer. We demonstrate how a temperature dependence of the AF/FM spin configuration in line-shaped nanomagnets can be tuned by variation of their linewidth. This work provides insight into the AF/FM interface exchange coupling in complex oxide heterostructures and the possibilities of spin control by nanostructuring in thin film spintronics.

Original language	English
Article number	192403
Journal	Applied Physics Letters
Volume	114
Issue number	19
DOIs	https://doi.org/10.1063/1.5094604
State	Published - May 13 2019

Funding

This research was undertaken with financial support from the Research Council of Norway, under Grant No. 231290. Partial funding was also obtained from the Norwegian Ph.D. 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. The Advanced Light Source was 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 in part at the Center for Nanophase Materials Sciences, which is a U.S. DOE Office of Science User Facility, and at NTNU NanoLab, NorFab. The Research Council of Norway is acknowledged for the support to the Norwegian Micro-and Nanofabrication Facility, NorFab, Project No. 245963/F50.

Funders	Funder number
Division for Science	221860/F60
Office of Basic Energy Sciences
U.S. Department of Energy	DE-AC02-05CH11231, 245963/F50
Office of Science
Norges Forskningsråd	231290

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abstract = "In this study, we report on a temperature-driven antiferromagnetic (AF) spin reorientation transition in micro- and nanostructures of AF/ferromagnetic (FM) LaFeO3/La0.7Sr0.3MnO3 thin film bilayers. Using a combination of x-ray photoemission electron microscopy and x-ray absorption spectroscopy, the N{\'e}el vector is shown to reorient 90° as a result of the competition between a shape-imposed anisotropy in the AF layer and interface coupling to the adjacent FM layer. We demonstrate how a temperature dependence of the AF/FM spin configuration in line-shaped nanomagnets can be tuned by variation of their linewidth. This work provides insight into the AF/FM interface exchange coupling in complex oxide heterostructures and the possibilities of spin control by nanostructuring in thin film spintronics.",

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AU - Bang, A. D.

AU - Hallsteinsen, I.

AU - Olsen, F. K.

AU - Slöetjes, S. D.

AU - Retterer, S. T.

AU - Scholl, A.

AU - Arenholz, E.

AU - Folven, E.

AU - Grepstad, J. K.

PY - 2019/5/13

Y1 - 2019/5/13

N2 - In this study, we report on a temperature-driven antiferromagnetic (AF) spin reorientation transition in micro- and nanostructures of AF/ferromagnetic (FM) LaFeO3/La0.7Sr0.3MnO3 thin film bilayers. Using a combination of x-ray photoemission electron microscopy and x-ray absorption spectroscopy, the Néel vector is shown to reorient 90° as a result of the competition between a shape-imposed anisotropy in the AF layer and interface coupling to the adjacent FM layer. We demonstrate how a temperature dependence of the AF/FM spin configuration in line-shaped nanomagnets can be tuned by variation of their linewidth. This work provides insight into the AF/FM interface exchange coupling in complex oxide heterostructures and the possibilities of spin control by nanostructuring in thin film spintronics.

AB - In this study, we report on a temperature-driven antiferromagnetic (AF) spin reorientation transition in micro- and nanostructures of AF/ferromagnetic (FM) LaFeO3/La0.7Sr0.3MnO3 thin film bilayers. Using a combination of x-ray photoemission electron microscopy and x-ray absorption spectroscopy, the Néel vector is shown to reorient 90° as a result of the competition between a shape-imposed anisotropy in the AF layer and interface coupling to the adjacent FM layer. We demonstrate how a temperature dependence of the AF/FM spin configuration in line-shaped nanomagnets can be tuned by variation of their linewidth. This work provides insight into the AF/FM interface exchange coupling in complex oxide heterostructures and the possibilities of spin control by nanostructuring in thin film spintronics.

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Néel vector reorientation in ferromagnetic/antiferromagnetic complex oxide nanostructures

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