The magnetic interfacial properties of an exchange biased nanocrystalline Ni80Fe20/α-Fe2O3 bilayer studied by polarized neutron reflectometry and Monte Carlo simulation

Simple item page
dc.contributor.authorCauser, GLen_AU
dc.contributor.authorCortie, DLen_AU
dc.contributor.authorCallori, SJen_AU
dc.contributor.authorManna, PKen_AU
dc.contributor.authorvan Lierop, Jen_AU
dc.contributor.authorLee, YJen_AU
dc.contributor.authorWang, XLen_AU
dc.contributor.authorLin, KWen_AU
dc.contributor.authorKlose, Ken_AU
dc.date.accessioned2024-01-12T01:16:31Zen_AU
dc.date.available2024-01-12T01:16:31Zen_AU
dc.date.issued2019-11-22en_AU
dc.date.statistics2023-10-20en_AU
dc.description.abstractThe strength of exchange bias can be influenced by interface roughness and antiferromagnetic morphology. Here, we studied the interface profile of an exchange biased, nanocrystalline Ni80Fe20/α-Fe2O3 bilayer. Magnetometry determined the bilayer's exchange bias is observed below a blocking temperature of 75 K. Polarized neutron reflectometry measurements revealed the Ni80Fe20 layer was fully saturated to yield a net-moment of 0.95 μB/atom, while the majority of the Fe2O3 layer exhibited zero net-magnetization with the exception of the interfacial region with an uncompensated moment between 0.5 and 1.0 μB/Fe2O3. Monte Carlo simulations of a ferromagnetic/antiferromagnetic bilayer incorporating a granular antiferromagnet indicate that an extrinsic uncompensated moment of ∼1.0 μB/Fe2O3 can arise from grain boundary disorder. The size of the modeled moment is equivalent to the experimental value, and comparable with previous calculations. Furthermore, unlike intrinsic uncompensated spins, it is found that the disorder-induced moment in the granular antiferromagnet is not destroyed by interface roughness. © 2019 The Japan Society of Applied Physicsen_AU
dc.description.sponsorshipResearch was supported by MOST of Taiwan, NSERC of Canada, and ANSTO of Australia (under proposal P3989).en_AU
dc.identifier.articlenumberSAAC03en_AU
dc.identifier.citationCauser, G. L., Cortie, D. L., Callori, S. J., Manna, P. K., van Lierop, J., Lee, Y.-J., Wang, X. L., Lin, K.-W., & Klose, F. (2019). The magnetic interfacial properties of an exchange biased nanocrystalline Ni80Fe20/α-Fe2O3 bilayer studied by polarized neutron reflectometry and Monte Carlo simulation. Japanese Journal of Applied Physics, 59(SA), SAAC03. doi:10.7567/1347-4065/ab4603en_AU
dc.identifier.issn0021-8979en_AU
dc.identifier.issueSAen_AU
dc.identifier.journaltitleJapanese Journal of Applied Physicsen_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15341en_AU
dc.identifier.volume59en_AU
dc.language.isoenen_AU
dc.publisherInstitute of Physicsen_AU
dc.relation.urihttps://doi.org/10.7567/1347-4065/ab4603en_AU
dc.subjectLayersen_AU
dc.subjectMagnetismen_AU
dc.subjectNanocrystalsen_AU
dc.subjectNeutron reflectorsen_AU
dc.subjectMonte Carlo Methoden_AU
dc.subjectSimulationen_AU
dc.subjectRoughnessen_AU
dc.subjectAntiferromagnetic materialsen_AU
dc.titleThe magnetic interfacial properties of an exchange biased nanocrystalline Ni80Fe20/α-Fe2O3 bilayer studied by polarized neutron reflectometry and Monte Carlo simulationen_AU
dc.typeJournal Articleen_AU
Files
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Journal Articles