Structure, magnetic properties and magnetoelastic anisotropy in epitaxial Sr(Ti₁₋ₓCoₓ)O₃ films
We report the structure, magnetic properties and magnetoelastic anisotropy of epitaxial Sr(Ti₁₋ₓCoₓ)O₃ films grown on LaAlO₃ (001) and SrTiO₃ (001) substrates by pulsed laser deposition. Room temperature ferromagnetism was observed in the Sr(Ti[subscript 0.86]Co[subscript 0.14])O₃ and Sr(Ti[subscrip...
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| Format: | Article |
| Language: | en_US |
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Institute of Physics Publishing
2012
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| Online Access: | http://hdl.handle.net/1721.1/70534 https://orcid.org/0000-0003-2262-1249 |
| _version_ | 1826201648548020224 |
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| author | Bi, Lei Kim, Hyun-Suk Dionne, Gerald F. Ross, Caroline A. |
| author2 | Lincoln Laboratory |
| author_facet | Lincoln Laboratory Bi, Lei Kim, Hyun-Suk Dionne, Gerald F. Ross, Caroline A. |
| author_sort | Bi, Lei |
| collection | MIT |
| description | We report the structure, magnetic properties and magnetoelastic anisotropy of epitaxial Sr(Ti₁₋ₓCoₓ)O₃ films grown on LaAlO₃ (001) and SrTiO₃ (001) substrates by pulsed laser deposition. Room temperature ferromagnetism was observed in the Sr(Ti[subscript 0.86]Co[subscript 0.14])O₃ and Sr(Ti[subscript 0.77]Co[subscript 0.23])O₃ films. The formation of magnetic secondary phases such as Co-metal clusters in Sr(Ti[subscript 0.77]Co[subscript 0.23])O₃ is excluded based on x-ray diffraction, cross-sectional TEM, x-ray photoelectron spectroscopy and x-ray-absorption near edge spectroscopy. A large magnetic anisotropy is observed in Sr(Ti[subscript 0.77]Co[subscript 0.23])O₃ films. The net anisotropy is strongly influenced by growth conditions and the substrate and is attributed to magnetoelastic effects. The magnetoelastic anisotropy is related to the valence and spin states of the Co ions, which contribute to the ferromagnetic properties. Magneto-optical characterization yields a figure of merit (Faraday rotation/optical absorption) of 0.57 deg dB⁻[superscript 1] in the Sr(Ti[subscript 0.77]Co[subscript 0.23])O₃ film at 1550 nm wavelength, making it potentially useful in integrated magneto-optical applications. |
| first_indexed | 2024-09-23T11:54:37Z |
| format | Article |
| id | mit-1721.1/70534 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:54:37Z |
| publishDate | 2012 |
| publisher | Institute of Physics Publishing |
| record_format | dspace |
| spelling | mit-1721.1/705342022-09-27T22:46:08Z Structure, magnetic properties and magnetoelastic anisotropy in epitaxial Sr(Ti₁₋ₓCoₓ)O₃ films Bi, Lei Kim, Hyun-Suk Dionne, Gerald F. Ross, Caroline A. Lincoln Laboratory Massachusetts Institute of Technology. Department of Materials Science and Engineering Ross, Caroline A. Bi, Lei Kim, Hyun-Suk Dionne, Gerald F. Ross, Caroline A. We report the structure, magnetic properties and magnetoelastic anisotropy of epitaxial Sr(Ti₁₋ₓCoₓ)O₃ films grown on LaAlO₃ (001) and SrTiO₃ (001) substrates by pulsed laser deposition. Room temperature ferromagnetism was observed in the Sr(Ti[subscript 0.86]Co[subscript 0.14])O₃ and Sr(Ti[subscript 0.77]Co[subscript 0.23])O₃ films. The formation of magnetic secondary phases such as Co-metal clusters in Sr(Ti[subscript 0.77]Co[subscript 0.23])O₃ is excluded based on x-ray diffraction, cross-sectional TEM, x-ray photoelectron spectroscopy and x-ray-absorption near edge spectroscopy. A large magnetic anisotropy is observed in Sr(Ti[subscript 0.77]Co[subscript 0.23])O₃ films. The net anisotropy is strongly influenced by growth conditions and the substrate and is attributed to magnetoelastic effects. The magnetoelastic anisotropy is related to the valence and spin states of the Co ions, which contribute to the ferromagnetic properties. Magneto-optical characterization yields a figure of merit (Faraday rotation/optical absorption) of 0.57 deg dB⁻[superscript 1] in the Sr(Ti[subscript 0.77]Co[subscript 0.23])O₃ film at 1550 nm wavelength, making it potentially useful in integrated magneto-optical applications. National Science Foundation (U.S.) National Science Foundation (U.S.) (Division of Materials Research) Korea Research Foundation (Grant MOEHRD) Korea (South). Ministry of Government Administration (KRF-2006-352-D00094) 2012-05-07T20:23:15Z 2012-05-07T20:23:15Z 2010-04 2009-12 Article http://purl.org/eprint/type/JournalArticle 1367-2630 http://hdl.handle.net/1721.1/70534 Bi, Lei et al. “Structure, Magnetic Properties and Magnetoelastic Anisotropy in Epitaxial Sr(Ti₁₋ₓCoₓ)O₃ Films.” New Journal of Physics 12.4 (2010): 043044. https://orcid.org/0000-0003-2262-1249 en_US http://dx.doi.org/10.1088/1367-2630/12/4/043044 New Journal of Physics Creative Commons Attribution 3.0 http://creativecommons.org/licenses/by/3.0/ application/pdf Institute of Physics Publishing New Journal of Physics |
| spellingShingle | Bi, Lei Kim, Hyun-Suk Dionne, Gerald F. Ross, Caroline A. Structure, magnetic properties and magnetoelastic anisotropy in epitaxial Sr(Ti₁₋ₓCoₓ)O₃ films |
| title | Structure, magnetic properties and magnetoelastic anisotropy in epitaxial Sr(Ti₁₋ₓCoₓ)O₃ films |
| title_full | Structure, magnetic properties and magnetoelastic anisotropy in epitaxial Sr(Ti₁₋ₓCoₓ)O₃ films |
| title_fullStr | Structure, magnetic properties and magnetoelastic anisotropy in epitaxial Sr(Ti₁₋ₓCoₓ)O₃ films |
| title_full_unstemmed | Structure, magnetic properties and magnetoelastic anisotropy in epitaxial Sr(Ti₁₋ₓCoₓ)O₃ films |
| title_short | Structure, magnetic properties and magnetoelastic anisotropy in epitaxial Sr(Ti₁₋ₓCoₓ)O₃ films |
| title_sort | structure magnetic properties and magnetoelastic anisotropy in epitaxial sr ti₁₋ₓcoₓ o₃ films |
| url | http://hdl.handle.net/1721.1/70534 https://orcid.org/0000-0003-2262-1249 |
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