Identification of iron oxide phases in thin films grown on Al sub(2)O sub(3)(0 0 0 1) by Raman spectroscopy and X-ray diffraction
We report on the identification of Fe sub(3)O sub(4) (magnetite) and alpha -Fe sub(2)O sub(3) (hematite) in iron oxide thin films grown on alpha -Al sub(2)O sub(3)(0 0 0 1) by evaporation of Fe in an O sub(2)-atmosphere with a thickness of a few unit cells. The phases were observed by Raman spectros...
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| Veröffentlicht in: | Surface science 2010-04, Vol.604 (7-8), p.679-685 |
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| creator | Luebbe, Maike Gigler, Alexander M Stark, Robert W Moritz, Wolfgang |
| description | We report on the identification of Fe sub(3)O sub(4) (magnetite) and alpha -Fe sub(2)O sub(3) (hematite) in iron oxide thin films grown on alpha -Al sub(2)O sub(3)(0 0 0 1) by evaporation of Fe in an O sub(2)-atmosphere with a thickness of a few unit cells. The phases were observed by Raman spectroscopy and confirmed by X-ray diffraction (XRD). Magnetite appeared independently from the substrate temperature and could not be completely removed by post-annealing in an oxygen atmosphere as observed by X-ray diffraction. In the temperature range between 400 degree C and 500 degree C the X-ray diffraction shows that predominantly hematite is formed, the Raman spectrum shows a mixture of magnetite and hematite. At both lower and higher substrate temperatures (300 degree C and 600 degree C) only magnetite was observed. After post-annealing in an O sub(2)-atmosphere of 5 x 10 super(-5) mbar only hematite was detectable in the Raman spectrum. |
| doi_str_mv | 10.1016/j.susc.2010.01.015 |
| format | Article |
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The phases were observed by Raman spectroscopy and confirmed by X-ray diffraction (XRD). Magnetite appeared independently from the substrate temperature and could not be completely removed by post-annealing in an oxygen atmosphere as observed by X-ray diffraction. In the temperature range between 400 degree C and 500 degree C the X-ray diffraction shows that predominantly hematite is formed, the Raman spectrum shows a mixture of magnetite and hematite. At both lower and higher substrate temperatures (300 degree C and 600 degree C) only magnetite was observed. 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The phases were observed by Raman spectroscopy and confirmed by X-ray diffraction (XRD). Magnetite appeared independently from the substrate temperature and could not be completely removed by post-annealing in an oxygen atmosphere as observed by X-ray diffraction. In the temperature range between 400 degree C and 500 degree C the X-ray diffraction shows that predominantly hematite is formed, the Raman spectrum shows a mixture of magnetite and hematite. At both lower and higher substrate temperatures (300 degree C and 600 degree C) only magnetite was observed. After post-annealing in an O sub(2)-atmosphere of 5 x 10 super(-5) mbar only hematite was detectable in the Raman spectrum.</description><subject>Diffraction</subject><subject>Hematite</subject><subject>Iron oxides</subject><subject>Magnetite</subject><subject>Phases</subject><subject>Raman spectroscopy</subject><subject>Thin films</subject><subject>X-rays</subject><issn>0039-6028</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNqNjT1PwzAQhj2A1PLxBzrdRjMknJOmJSNCIDpVQgxslevY1JVjB58jyMg_x0H8AO49vY90eqRjbMGx4MjXt6eCBpJFiemAPG19xuaIVZOvsbybsQuiE6ZZNfWcfW9b5aLRRopovAOvwYSJX6ZV0B8FKQLjIB5TaWM7gvfgP5Pg4N4CDYdlme1-WWVLhCk8g8MIL6ITDqhXMgZP0vcjCNfCWx7ECK3ROgg5vbxi51pYUtd_vGQ3T4-vD895H_zHoCjuO0NSWSuc8gPtN3W1WZUNx-r_5g8smlb3</recordid><startdate>20100415</startdate><enddate>20100415</enddate><creator>Luebbe, Maike</creator><creator>Gigler, Alexander M</creator><creator>Stark, Robert W</creator><creator>Moritz, Wolfgang</creator><scope>7QF</scope><scope>7QQ</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20100415</creationdate><title>Identification of iron oxide phases in thin films grown on Al sub(2)O sub(3)(0 0 0 1) by Raman spectroscopy and X-ray diffraction</title><author>Luebbe, Maike ; Gigler, Alexander M ; Stark, Robert W ; Moritz, Wolfgang</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-proquest_miscellaneous_7537429103</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Diffraction</topic><topic>Hematite</topic><topic>Iron oxides</topic><topic>Magnetite</topic><topic>Phases</topic><topic>Raman spectroscopy</topic><topic>Thin films</topic><topic>X-rays</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Luebbe, Maike</creatorcontrib><creatorcontrib>Gigler, Alexander M</creatorcontrib><creatorcontrib>Stark, Robert W</creatorcontrib><creatorcontrib>Moritz, Wolfgang</creatorcontrib><collection>Aluminium Industry Abstracts</collection><collection>Ceramic Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Surface science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Luebbe, Maike</au><au>Gigler, Alexander M</au><au>Stark, Robert W</au><au>Moritz, Wolfgang</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Identification of iron oxide phases in thin films grown on Al sub(2)O sub(3)(0 0 0 1) by Raman spectroscopy and X-ray diffraction</atitle><jtitle>Surface science</jtitle><date>2010-04-15</date><risdate>2010</risdate><volume>604</volume><issue>7-8</issue><spage>679</spage><epage>685</epage><pages>679-685</pages><issn>0039-6028</issn><abstract>We report on the identification of Fe sub(3)O sub(4) (magnetite) and alpha -Fe sub(2)O sub(3) (hematite) in iron oxide thin films grown on alpha -Al sub(2)O sub(3)(0 0 0 1) by evaporation of Fe in an O sub(2)-atmosphere with a thickness of a few unit cells. The phases were observed by Raman spectroscopy and confirmed by X-ray diffraction (XRD). Magnetite appeared independently from the substrate temperature and could not be completely removed by post-annealing in an oxygen atmosphere as observed by X-ray diffraction. In the temperature range between 400 degree C and 500 degree C the X-ray diffraction shows that predominantly hematite is formed, the Raman spectrum shows a mixture of magnetite and hematite. At both lower and higher substrate temperatures (300 degree C and 600 degree C) only magnetite was observed. After post-annealing in an O sub(2)-atmosphere of 5 x 10 super(-5) mbar only hematite was detectable in the Raman spectrum.</abstract><doi>10.1016/j.susc.2010.01.015</doi></addata></record> |
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| subjects | Diffraction Hematite Iron oxides Magnetite Phases Raman spectroscopy Thin films X-rays |
| title | Identification of iron oxide phases in thin films grown on Al sub(2)O sub(3)(0 0 0 1) by Raman spectroscopy and X-ray diffraction |
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