Magnetism at spinel thin film interfaces probed through soft x-ray spectroscopy techniques

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Magnetic order and coupling at the interfaces of highly spin polarized Fe{sub 3}O{sub 4} heterostructures have been determined by surface sensitive and element specific soft x-ray spectroscopy and spectromicroscopy techniques. At ambient temperature, the interface between paramagnetic CoCr{sub 2}O{sub 4} or MnCr{sub 2}O{sub 4} and ferrimagnetic Fe{sub 3}O{sub 4} isostructural bilayers exhibits long range magnetic order of Co, Mn and Cr cations which cannot be explained in terms of the formation of interfacial MnFe{sub 2}O{sub 4} or CoFe{sub 2}O{sub 4}. Instead, the ferrimagnetism is induced by the adjacent Fe{sub 3}O{sub 4} layer and is the result of the stabilization of ... continued below

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Chopdekar, R.V.; Liberati, M.; Takamura, Y.; Kourkoutis, L. Fitting; Bettinger, J. S.; Nelson-Cheeseman, B. B. et al. December 16, 2009.

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Magnetic order and coupling at the interfaces of highly spin polarized Fe{sub 3}O{sub 4} heterostructures have been determined by surface sensitive and element specific soft x-ray spectroscopy and spectromicroscopy techniques. At ambient temperature, the interface between paramagnetic CoCr{sub 2}O{sub 4} or MnCr{sub 2}O{sub 4} and ferrimagnetic Fe{sub 3}O{sub 4} isostructural bilayers exhibits long range magnetic order of Co, Mn and Cr cations which cannot be explained in terms of the formation of interfacial MnFe{sub 2}O{sub 4} or CoFe{sub 2}O{sub 4}. Instead, the ferrimagnetism is induced by the adjacent Fe{sub 3}O{sub 4} layer and is the result of the stabilization of a spinel phase not achievable in bulk form. Magnetism at the interface region is observable up to 500 K, far beyond the chromite bulk Curie temperature of 50-95 K.

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  • Journal Name: Journal of Magnetism and Magnetic Materials

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  • Report No.: LBNL-3830E
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 986326
  • Archival Resource Key: ark:/67531/metadc1013154

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  • December 16, 2009

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  • Oct. 14, 2017, 8:36 a.m.

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  • Oct. 18, 2017, 10:32 a.m.

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Chopdekar, R.V.; Liberati, M.; Takamura, Y.; Kourkoutis, L. Fitting; Bettinger, J. S.; Nelson-Cheeseman, B. B. et al. Magnetism at spinel thin film interfaces probed through soft x-ray spectroscopy techniques, article, December 16, 2009; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc1013154/: accessed July 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.