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Influence of substrate pre-deposition annealing on step edges-induced magnetoresistance in epitaxial magnetite films grown on vicinal MgO (1 0 0) substrates
Magnetoresistance (MR) properties of epitaxial magnetite, Fe 3O 4, films grown on vicinal MgO (1 0 0) substrates show an enhancement and anisotropy in the MR in the direction across the step edges compared to the direction along the step edges. The observed enhancement in low-field MR response and M...
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| Published in: | Journal of magnetism and magnetic materials 2007-09, Vol.316 (2), p.e969-e972 |
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| Main Authors: | , , |
| Format: | Article |
| Language: | English |
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| cites | cdi_FETCH-LOGICAL-c331t-b9feab1aba50a626e2970db1ca8039cc0ca5fdda99fc4655a91f5c2ed288f96f3 |
| container_end_page | e972 |
| container_issue | 2 |
| container_start_page | e969 |
| container_title | Journal of magnetism and magnetic materials |
| container_volume | 316 |
| creator | Sofin, R.G.S. Arora, S.K. Shvets, I.V. |
| description | Magnetoresistance (MR) properties of epitaxial magnetite, Fe
3O
4, films grown on vicinal MgO (1
0
0) substrates show an enhancement and anisotropy in the MR in the direction across the step edges compared to the direction along the step edges. The observed enhancement in low-field MR response and MR anisotropy of epitaxial Fe
3O
4 films is explained by the enhanced spin scattering introduced due to the presence of atomic height steps, which leads to the formation of a greater number of antiphase boundaries (APBs) with out-of-plane shift vectors. We found that the optimum annealing duration required to observe maximum MR anisotropy is between 5 and 9
h. Longer annealing time leads to segregation of Ca impurities on the MgO surface which lead to a decrease in APB density and MR anisotropy. |
| doi_str_mv | 10.1016/j.jmmm.2007.03.158 |
| format | article |
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3O
4, films grown on vicinal MgO (1
0
0) substrates show an enhancement and anisotropy in the MR in the direction across the step edges compared to the direction along the step edges. The observed enhancement in low-field MR response and MR anisotropy of epitaxial Fe
3O
4 films is explained by the enhanced spin scattering introduced due to the presence of atomic height steps, which leads to the formation of a greater number of antiphase boundaries (APBs) with out-of-plane shift vectors. We found that the optimum annealing duration required to observe maximum MR anisotropy is between 5 and 9
h. Longer annealing time leads to segregation of Ca impurities on the MgO surface which lead to a decrease in APB density and MR anisotropy.</description><identifier>ISSN: 0304-8853</identifier><identifier>DOI: 10.1016/j.jmmm.2007.03.158</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Magnetoresistance ; Molecular beam epitaxy ; Thin film ; Verwey transition ; Vicinal substrate</subject><ispartof>Journal of magnetism and magnetic materials, 2007-09, Vol.316 (2), p.e969-e972</ispartof><rights>2007 Elsevier B.V.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c331t-b9feab1aba50a626e2970db1ca8039cc0ca5fdda99fc4655a91f5c2ed288f96f3</citedby><cites>FETCH-LOGICAL-c331t-b9feab1aba50a626e2970db1ca8039cc0ca5fdda99fc4655a91f5c2ed288f96f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Sofin, R.G.S.</creatorcontrib><creatorcontrib>Arora, S.K.</creatorcontrib><creatorcontrib>Shvets, I.V.</creatorcontrib><title>Influence of substrate pre-deposition annealing on step edges-induced magnetoresistance in epitaxial magnetite films grown on vicinal MgO (1 0 0) substrates</title><title>Journal of magnetism and magnetic materials</title><description>Magnetoresistance (MR) properties of epitaxial magnetite, Fe
3O
4, films grown on vicinal MgO (1
0
0) substrates show an enhancement and anisotropy in the MR in the direction across the step edges compared to the direction along the step edges. The observed enhancement in low-field MR response and MR anisotropy of epitaxial Fe
3O
4 films is explained by the enhanced spin scattering introduced due to the presence of atomic height steps, which leads to the formation of a greater number of antiphase boundaries (APBs) with out-of-plane shift vectors. We found that the optimum annealing duration required to observe maximum MR anisotropy is between 5 and 9
h. Longer annealing time leads to segregation of Ca impurities on the MgO surface which lead to a decrease in APB density and MR anisotropy.</description><subject>Magnetoresistance</subject><subject>Molecular beam epitaxy</subject><subject>Thin film</subject><subject>Verwey transition</subject><subject>Vicinal substrate</subject><issn>0304-8853</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><recordid>eNp9kMFu1TAQRbMAiVL6A6y8QrBIGCcvebHEBlXQVirqBtbWxB5H85TYwXYK_Rc-lkSvEjtW1sj3Hs2congroZIgu4-n6jTPc1UDHCtoKtn2L4oLaOBQ9n3bvCpep3QCAHnou4viz51300rekAhOpHVIOWImsUQqLS0hcebgBXpPOLEfxTakTIsgO1Iq2dvVkBUzjp5yiJQ4Zdxp7AUtnPE34_T8zRvX8TQnMcbwy--oRzbst8C38UG8lwIEfPi3RHpTvHQ4Jbp6fi-LH1-_fL--Le8fbu6uP9-XpmlkLgflCAeJA7aAXd1RrY5gB2mwh0YZAwZbZy0q5cyha1tU0rWmJlv3vVOday6Ld2fuEsPPlVLWMydD04Sewpp0rVR3PHawBetz0MSQUiSnl8gzxictQe_y9Unv8vUuX0OjN_lb6dO5RNsJj0xRJ8O7ccuRTNY28P_qfwHs9JQ_</recordid><startdate>20070901</startdate><enddate>20070901</enddate><creator>Sofin, R.G.S.</creator><creator>Arora, S.K.</creator><creator>Shvets, I.V.</creator><general>Elsevier B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20070901</creationdate><title>Influence of substrate pre-deposition annealing on step edges-induced magnetoresistance in epitaxial magnetite films grown on vicinal MgO (1 0 0) substrates</title><author>Sofin, R.G.S. ; Arora, S.K. ; Shvets, I.V.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c331t-b9feab1aba50a626e2970db1ca8039cc0ca5fdda99fc4655a91f5c2ed288f96f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>Magnetoresistance</topic><topic>Molecular beam epitaxy</topic><topic>Thin film</topic><topic>Verwey transition</topic><topic>Vicinal substrate</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sofin, R.G.S.</creatorcontrib><creatorcontrib>Arora, S.K.</creatorcontrib><creatorcontrib>Shvets, I.V.</creatorcontrib><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of magnetism and magnetic materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sofin, R.G.S.</au><au>Arora, S.K.</au><au>Shvets, I.V.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Influence of substrate pre-deposition annealing on step edges-induced magnetoresistance in epitaxial magnetite films grown on vicinal MgO (1 0 0) substrates</atitle><jtitle>Journal of magnetism and magnetic materials</jtitle><date>2007-09-01</date><risdate>2007</risdate><volume>316</volume><issue>2</issue><spage>e969</spage><epage>e972</epage><pages>e969-e972</pages><issn>0304-8853</issn><abstract>Magnetoresistance (MR) properties of epitaxial magnetite, Fe
3O
4, films grown on vicinal MgO (1
0
0) substrates show an enhancement and anisotropy in the MR in the direction across the step edges compared to the direction along the step edges. The observed enhancement in low-field MR response and MR anisotropy of epitaxial Fe
3O
4 films is explained by the enhanced spin scattering introduced due to the presence of atomic height steps, which leads to the formation of a greater number of antiphase boundaries (APBs) with out-of-plane shift vectors. We found that the optimum annealing duration required to observe maximum MR anisotropy is between 5 and 9
h. Longer annealing time leads to segregation of Ca impurities on the MgO surface which lead to a decrease in APB density and MR anisotropy.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.jmmm.2007.03.158</doi></addata></record> |
| fulltext | fulltext |
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| ispartof | Journal of magnetism and magnetic materials, 2007-09, Vol.316 (2), p.e969-e972 |
| issn | 0304-8853 |
| language | eng |
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| source | ScienceDirect Journals |
| subjects | Magnetoresistance Molecular beam epitaxy Thin film Verwey transition Vicinal substrate |
| title | Influence of substrate pre-deposition annealing on step edges-induced magnetoresistance in epitaxial magnetite films grown on vicinal MgO (1 0 0) substrates |
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