Interface mixing and its impact on exchange coupling in exchange biased systems
Abstract
Exchange bias and interlayer exchange coupling are interface driven phenomena. Since an ideal interface is very challenging to achieve, a clear understanding of the chemical and magnetic natures of interfaces is pivotal to identify their influence on the magnetism. We have chosen Ni80Fe20/CoO(tCoO)/Co trilayers as a model system, and identified non-stoichiometric Ni-ferrite and Co-ferrite at the surface and interface, respectively. These ferrites, being ferrimagnets typically, should influence the exchange coupling. But, in our trilayers the interface ferrites were found not to be ferro-or ferri-magnetic; thus having no observable influence on the exchange coupling. Our analysis also revealed that (i) interlayer exchange coupling was present between Ni80Fe20 and Co even though the interlayer thickness was significantly larger than expected for this phenomenon to happen, and (ii) the majority of the CoO layer (except some portion near the interface) did not contribute to the observed exchange bias. Here, we also identified that the interlayer exchange coupling and the exchange bias properties were not interdependent.
- Authors:
-
- Univ. of Manitoba, Winnipeg MB (Canada). Dept. of Physics and Astronomy
- National Chung Hsing Univ., Taichung (Taiwan). Dept. of Materials Science and Engineering
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Natural Sciences and Engineering Research Council of Canada (NSERC); Canada Foundation for Innovation (CFI)
- OSTI Identifier:
- 1378109
- Alternate Identifier(s):
- OSTI ID: 1328246
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Physics. Condensed Matter
- Additional Journal Information:
- Journal Volume: 28; Journal Issue: 48; Journal ID: ISSN 0953-8984
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Exchange bias; Interlayer exchange coupling; interface mixing; x-ray absorption spectroscopy (XAS); x-ray magnetic circular dichrosim (XMCD)
Citation Formats
Manna, P. K., Skoropata, E., Ting, Y-W, Lin, K-W, Freeland, J. W., and van Lierop, J. Interface mixing and its impact on exchange coupling in exchange biased systems. United States: N. p., 2016.
Web. doi:10.1088/0953-8984/28/48/486004.
Manna, P. K., Skoropata, E., Ting, Y-W, Lin, K-W, Freeland, J. W., & van Lierop, J. Interface mixing and its impact on exchange coupling in exchange biased systems. United States. https://doi.org/10.1088/0953-8984/28/48/486004
Manna, P. K., Skoropata, E., Ting, Y-W, Lin, K-W, Freeland, J. W., and van Lierop, J. Wed .
"Interface mixing and its impact on exchange coupling in exchange biased systems". United States. https://doi.org/10.1088/0953-8984/28/48/486004. https://www.osti.gov/servlets/purl/1378109.
@article{osti_1378109,
title = {Interface mixing and its impact on exchange coupling in exchange biased systems},
author = {Manna, P. K. and Skoropata, E. and Ting, Y-W and Lin, K-W and Freeland, J. W. and van Lierop, J.},
abstractNote = {Exchange bias and interlayer exchange coupling are interface driven phenomena. Since an ideal interface is very challenging to achieve, a clear understanding of the chemical and magnetic natures of interfaces is pivotal to identify their influence on the magnetism. We have chosen Ni80Fe20/CoO(tCoO)/Co trilayers as a model system, and identified non-stoichiometric Ni-ferrite and Co-ferrite at the surface and interface, respectively. These ferrites, being ferrimagnets typically, should influence the exchange coupling. But, in our trilayers the interface ferrites were found not to be ferro-or ferri-magnetic; thus having no observable influence on the exchange coupling. Our analysis also revealed that (i) interlayer exchange coupling was present between Ni80Fe20 and Co even though the interlayer thickness was significantly larger than expected for this phenomenon to happen, and (ii) the majority of the CoO layer (except some portion near the interface) did not contribute to the observed exchange bias. Here, we also identified that the interlayer exchange coupling and the exchange bias properties were not interdependent.},
doi = {10.1088/0953-8984/28/48/486004},
journal = {Journal of Physics. Condensed Matter},
number = 48,
volume = 28,
place = {United States},
year = {Wed Oct 05 00:00:00 EDT 2016},
month = {Wed Oct 05 00:00:00 EDT 2016}
}
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Works referencing / citing this record:
Surface engineering with Ar + /O 2 + ion beam bombardment: Tuning the electronic and magnetic behavior of Ni 80 Fe 20 /La 0.7 Sr 0.3 MnO 3 /SrTiO 3 (001) junctions
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