Hyperfine interactions on iron nuclei in the BCC and fractally decomposed BCC/FCC mixed phase iron–gold alloys
Iron–gold alloys for the gold concentration ranging from 1 at.% till 70 at.% were investigated by means of the 57Fe-14.4 keV Mössbauer spectroscopy, X-ray diffraction and scanning electron microscopy. Samples were prepared by arc melting of the elements, and investigated as cast and after annealing....
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| Veröffentlicht in: | Journal of alloys and compounds 2008-06, Vol.458 (1), p.96-103 |
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| container_title | Journal of alloys and compounds |
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| creator | Błachowski, A. Ruebenbauer, K. Przewoźnik, J. Żukrowski, J. |
| description | Iron–gold alloys for the gold concentration ranging from 1
at.% till 70
at.% were investigated by means of the
57Fe-14.4
keV Mössbauer spectroscopy, X-ray diffraction and scanning electron microscopy. Samples were prepared by arc melting of the elements, and investigated as cast and after annealing. A single BCC phase is obtained for the gold concentration up to about 3
at.%, while for the higher gold concentration one obtains mixed phase samples containing BCC and FCC phases both. The BCC phase is ferromagnetically ordered at room temperature. Contributions to the charge and spin density on iron atoms in the BCC phase due to the gold impurities were determined up to the second neighbors. The FCC phase is either magnetically ordered at room temperature or it is paramagnetic at the above temperature depending upon iron concentration, as the magnetic transition temperature is increasing with the increasing iron concentration. BCC/FCC mixed phase samples are characterized by very small crystallites (nanoparticles) of both phases. These nanoparticles form hierarchical fractal structures on the scale ranging from more than 1
mm till less than 30
nm. |
| doi_str_mv | 10.1016/j.jallcom.2007.04.205 |
| format | Article |
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at.% till 70
at.% were investigated by means of the
57Fe-14.4
keV Mössbauer spectroscopy, X-ray diffraction and scanning electron microscopy. Samples were prepared by arc melting of the elements, and investigated as cast and after annealing. A single BCC phase is obtained for the gold concentration up to about 3
at.%, while for the higher gold concentration one obtains mixed phase samples containing BCC and FCC phases both. The BCC phase is ferromagnetically ordered at room temperature. Contributions to the charge and spin density on iron atoms in the BCC phase due to the gold impurities were determined up to the second neighbors. The FCC phase is either magnetically ordered at room temperature or it is paramagnetic at the above temperature depending upon iron concentration, as the magnetic transition temperature is increasing with the increasing iron concentration. BCC/FCC mixed phase samples are characterized by very small crystallites (nanoparticles) of both phases. These nanoparticles form hierarchical fractal structures on the scale ranging from more than 1
mm till less than 30
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at.% till 70
at.% were investigated by means of the
57Fe-14.4
keV Mössbauer spectroscopy, X-ray diffraction and scanning electron microscopy. Samples were prepared by arc melting of the elements, and investigated as cast and after annealing. A single BCC phase is obtained for the gold concentration up to about 3
at.%, while for the higher gold concentration one obtains mixed phase samples containing BCC and FCC phases both. The BCC phase is ferromagnetically ordered at room temperature. Contributions to the charge and spin density on iron atoms in the BCC phase due to the gold impurities were determined up to the second neighbors. The FCC phase is either magnetically ordered at room temperature or it is paramagnetic at the above temperature depending upon iron concentration, as the magnetic transition temperature is increasing with the increasing iron concentration. BCC/FCC mixed phase samples are characterized by very small crystallites (nanoparticles) of both phases. These nanoparticles form hierarchical fractal structures on the scale ranging from more than 1
mm till less than 30
nm.</description><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Exact sciences and technology</subject><subject>Fractals</subject><subject>Impurities in metals</subject><subject>Iron binary alloys</subject><subject>Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)</subject><subject>Magnetic properties and materials</subject><subject>Magnetic resonances and relaxations in condensed matter, mössbauer effect</subject><subject>Magnetically ordered materials: other intrinsic properties</subject><subject>Mössbauer effect; other γ-ray spectroscopy</subject><subject>Mössbauer spectroscopy</subject><subject>Nanoparticles</subject><subject>Physics</subject><issn>0925-8388</issn><issn>1873-4669</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><recordid>eNqFkE1uFDEQha2ISAwJR0DyBnY9Kf-0271CMCIEKVI2YW05dnXiUY_d2D2I2eUO3JCT4GZGbLOpp1J9Vc9-hLxjsGbA1NV2vbXj6NJuzQG6Nciq7RlZMd2JRirVvyIr6HnbaKH1a_KmlC0AsF6wFZluDhPmIUSkIc6YrZtDioWmSEOuJe7diKHO6PyE9PNmQ230dFi46nmgHqvvlAr6ZXh1XYFd-FW76ckW_Hfjz_PvxzR6Wvl0KJfkfLBjwbcnvSDfr7_cb26a27uv3zafbhsnOpgbxgb5IKzrQdlB856rlrfMtd5ybq13vHvAXgpw0EpmEVB531k1IDpwSvfignw43p1y-rHHMptdKA7H0UZM-2IE17JTABVsj6DLqZSMg5ly2Nl8MAzMkq_ZmlO-ZsnXgKza1r33JwNbnB1rJNGF8n-Zg5Bay-UhH48c1t_-DJhNcQGjQx8yutn4FF5w-gt7jZVV</recordid><startdate>20080630</startdate><enddate>20080630</enddate><creator>Błachowski, A.</creator><creator>Ruebenbauer, K.</creator><creator>Przewoźnik, J.</creator><creator>Żukrowski, J.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20080630</creationdate><title>Hyperfine interactions on iron nuclei in the BCC and fractally decomposed BCC/FCC mixed phase iron–gold alloys</title><author>Błachowski, A. ; Ruebenbauer, K. ; Przewoźnik, J. ; Żukrowski, J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c370t-11f4b3ac906af829265251c5da22aadc27be9430c0541ae0e6dd7a6feec0c6893</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>Exact sciences and technology</topic><topic>Fractals</topic><topic>Impurities in metals</topic><topic>Iron binary alloys</topic><topic>Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)</topic><topic>Magnetic properties and materials</topic><topic>Magnetic resonances and relaxations in condensed matter, mössbauer effect</topic><topic>Magnetically ordered materials: other intrinsic properties</topic><topic>Mössbauer effect; other γ-ray spectroscopy</topic><topic>Mössbauer spectroscopy</topic><topic>Nanoparticles</topic><topic>Physics</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Błachowski, A.</creatorcontrib><creatorcontrib>Ruebenbauer, K.</creatorcontrib><creatorcontrib>Przewoźnik, J.</creatorcontrib><creatorcontrib>Żukrowski, J.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of alloys and compounds</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Błachowski, A.</au><au>Ruebenbauer, K.</au><au>Przewoźnik, J.</au><au>Żukrowski, J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Hyperfine interactions on iron nuclei in the BCC and fractally decomposed BCC/FCC mixed phase iron–gold alloys</atitle><jtitle>Journal of alloys and compounds</jtitle><date>2008-06-30</date><risdate>2008</risdate><volume>458</volume><issue>1</issue><spage>96</spage><epage>103</epage><pages>96-103</pages><issn>0925-8388</issn><eissn>1873-4669</eissn><abstract>Iron–gold alloys for the gold concentration ranging from 1
at.% till 70
at.% were investigated by means of the
57Fe-14.4
keV Mössbauer spectroscopy, X-ray diffraction and scanning electron microscopy. Samples were prepared by arc melting of the elements, and investigated as cast and after annealing. A single BCC phase is obtained for the gold concentration up to about 3
at.%, while for the higher gold concentration one obtains mixed phase samples containing BCC and FCC phases both. The BCC phase is ferromagnetically ordered at room temperature. Contributions to the charge and spin density on iron atoms in the BCC phase due to the gold impurities were determined up to the second neighbors. The FCC phase is either magnetically ordered at room temperature or it is paramagnetic at the above temperature depending upon iron concentration, as the magnetic transition temperature is increasing with the increasing iron concentration. BCC/FCC mixed phase samples are characterized by very small crystallites (nanoparticles) of both phases. These nanoparticles form hierarchical fractal structures on the scale ranging from more than 1
mm till less than 30
nm.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jallcom.2007.04.205</doi><tpages>8</tpages></addata></record> |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology Fractals Impurities in metals Iron binary alloys Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.) Magnetic properties and materials Magnetic resonances and relaxations in condensed matter, mössbauer effect Magnetically ordered materials: other intrinsic properties Mössbauer effect other γ-ray spectroscopy Mössbauer spectroscopy Nanoparticles Physics |
| title | Hyperfine interactions on iron nuclei in the BCC and fractally decomposed BCC/FCC mixed phase iron–gold alloys |
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