Effects of neutron irradiation on Nd-Fe-B magnetic properties
Nd-Fe-B permanent magnets from two different manufacturers were irradiated in the Omega West reactor at Los Alamos National Laboratory, with fast neutrons at temperatures of 426 K (153 degrees C) and 350 K (77 degrees C) to fluences of 5.0*10/sup 16/ N/cm/sup 2/ and 6.1*10/sup 16/ N/cm/sup 2/, respe...
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| Veröffentlicht in: | IEEE Trans. Magn.; (United States) 1988-05, Vol.24 (3), p.2016-2019 |
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| creator | Cost, J.R. Brown, R.D. Giorgi, A.L. Stanley, J.T. |
| description | Nd-Fe-B permanent magnets from two different manufacturers were irradiated in the Omega West reactor at Los Alamos National Laboratory, with fast neutrons at temperatures of 426 K (153 degrees C) and 350 K (77 degrees C) to fluences of 5.0*10/sup 16/ N/cm/sup 2/ and 6.1*10/sup 16/ N/cm/sup 2/, respectively. At intervals during the irradiation the samples were removed from the reactor and the remanence measured at room temperature. The initial loss of remanence for irradiation at 426 K was 10% for a fluence of 10/sup 15/ N/cm/sup 2/. At 350 K the initial loss rate was roughly half this value. The loss rates were nearly the same for samples from the two different manufacturers. These losses are due to the irradiation since the remanence does not decay with annealing at 426 K. Remagnetization after irradiation results in full recovery of the remanence and roughly a 20% increase in the coercivity. Evidence from this experiment suggests that the primary mechanism for loss of remanence is nucleation of reverse domains by the collision cascade and subsequent growth into the original domain.< > |
| doi_str_mv | 10.1109/20.3393 |
| format | Article |
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At intervals during the irradiation the samples were removed from the reactor and the remanence measured at room temperature. The initial loss of remanence for irradiation at 426 K was 10% for a fluence of 10/sup 15/ N/cm/sup 2/. At 350 K the initial loss rate was roughly half this value. The loss rates were nearly the same for samples from the two different manufacturers. These losses are due to the irradiation since the remanence does not decay with annealing at 426 K. Remagnetization after irradiation results in full recovery of the remanence and roughly a 20% increase in the coercivity. Evidence from this experiment suggests that the primary mechanism for loss of remanence is nucleation of reverse domains by the collision cascade and subsequent growth into the original domain.< ></description><identifier>ISSN: 0018-9464</identifier><identifier>EISSN: 1941-0069</identifier><identifier>DOI: 10.1109/20.3393</identifier><identifier>CODEN: IEMGAQ</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>360106 - Metals & Alloys- Radiation Effects ; ALLOY SYSTEMS ; ALLOYS ; Annealing ; BORON ALLOYS ; Coercive force ; COHERENT SCATTERING ; Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Cross-disciplinary physics: materials science; rheology ; DATA ; DIFFRACTION ; Domain effects, magnetization curves, and hysteresis ; Exact sciences and technology ; EXPERIMENTAL DATA ; Inductors ; INFORMATION ; IRON ALLOYS ; IRRADIATION ; Laboratories ; MAGNETIC PROPERTIES ; Magnetic properties and materials ; MAGNETS ; Manufacturing ; MATERIALS SCIENCE ; Metals, semimetals and alloys ; NEODYMIUM ALLOYS ; NEUTRON DIFFRACTION ; Neutrons ; NUMERICAL DATA ; Other topics in magnetic properties and materials ; PERMANENT MAGNETS ; PHYSICAL PROPERTIES ; PHYSICAL RADIATION EFFECTS ; Physics ; RADIATION EFFECTS ; RARE EARTH ALLOYS ; Remanence ; SCATTERING ; Specific materials ; Temperature measurement ; TERNARY ALLOY SYSTEMS</subject><ispartof>IEEE Trans. Magn.; (United States), 1988-05, Vol.24 (3), p.2016-2019</ispartof><rights>1989 INIST-CNRS</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c424t-5b051cd677949b310f805a6b1836aee21dde194aa5a5313e97074bcb6b9fb3cb3</citedby><cites>FETCH-LOGICAL-c424t-5b051cd677949b310f805a6b1836aee21dde194aa5a5313e97074bcb6b9fb3cb3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/3393$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>315,781,785,797,886,27929,27930,54763</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/3393$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=7095334$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/6229938$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Cost, J.R.</creatorcontrib><creatorcontrib>Brown, R.D.</creatorcontrib><creatorcontrib>Giorgi, A.L.</creatorcontrib><creatorcontrib>Stanley, J.T.</creatorcontrib><creatorcontrib>Los Alamos National Labs., Los Alamos, NM (US)</creatorcontrib><title>Effects of neutron irradiation on Nd-Fe-B magnetic properties</title><title>IEEE Trans. Magn.; (United States)</title><addtitle>TMAG</addtitle><description>Nd-Fe-B permanent magnets from two different manufacturers were irradiated in the Omega West reactor at Los Alamos National Laboratory, with fast neutrons at temperatures of 426 K (153 degrees C) and 350 K (77 degrees C) to fluences of 5.0*10/sup 16/ N/cm/sup 2/ and 6.1*10/sup 16/ N/cm/sup 2/, respectively. At intervals during the irradiation the samples were removed from the reactor and the remanence measured at room temperature. The initial loss of remanence for irradiation at 426 K was 10% for a fluence of 10/sup 15/ N/cm/sup 2/. At 350 K the initial loss rate was roughly half this value. The loss rates were nearly the same for samples from the two different manufacturers. These losses are due to the irradiation since the remanence does not decay with annealing at 426 K. Remagnetization after irradiation results in full recovery of the remanence and roughly a 20% increase in the coercivity. Evidence from this experiment suggests that the primary mechanism for loss of remanence is nucleation of reverse domains by the collision cascade and subsequent growth into the original domain.< ></description><subject>360106 - Metals & Alloys- Radiation Effects</subject><subject>ALLOY SYSTEMS</subject><subject>ALLOYS</subject><subject>Annealing</subject><subject>BORON ALLOYS</subject><subject>Coercive force</subject><subject>COHERENT SCATTERING</subject><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>DATA</subject><subject>DIFFRACTION</subject><subject>Domain effects, magnetization curves, and hysteresis</subject><subject>Exact sciences and technology</subject><subject>EXPERIMENTAL DATA</subject><subject>Inductors</subject><subject>INFORMATION</subject><subject>IRON ALLOYS</subject><subject>IRRADIATION</subject><subject>Laboratories</subject><subject>MAGNETIC PROPERTIES</subject><subject>Magnetic properties and materials</subject><subject>MAGNETS</subject><subject>Manufacturing</subject><subject>MATERIALS SCIENCE</subject><subject>Metals, semimetals and alloys</subject><subject>NEODYMIUM ALLOYS</subject><subject>NEUTRON DIFFRACTION</subject><subject>Neutrons</subject><subject>NUMERICAL DATA</subject><subject>Other topics in magnetic properties and materials</subject><subject>PERMANENT MAGNETS</subject><subject>PHYSICAL PROPERTIES</subject><subject>PHYSICAL RADIATION EFFECTS</subject><subject>Physics</subject><subject>RADIATION EFFECTS</subject><subject>RARE EARTH ALLOYS</subject><subject>Remanence</subject><subject>SCATTERING</subject><subject>Specific materials</subject><subject>Temperature measurement</subject><subject>TERNARY ALLOY SYSTEMS</subject><issn>0018-9464</issn><issn>1941-0069</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1988</creationdate><recordtype>article</recordtype><recordid>eNqNkM1LAzEQxYMoWKt49biI6Glrvja7OXjQ0qpQ9KLnkGQnGtnu1iQ9-N-b2tKzMDAzzI83j4fQOcETQrC8pXjCmGQHaEQkJyXGQh6iEcakKSUX_BidxPiVV14RPEJ3M-fAplgMruhhncLQFz4E3XqdfJ5zvbTlHMqHYqk_ekjeFqswrCAkD_EUHTndRTjb9TF6n8_epk_l4vXxeXq_KC2nPJWVwRWxrahryaVhBLsGV1oY0jChAShpW8hmta50xQgDWeOaG2uEkc4wa9gYXW51h5i8itYnsJ926PtsXQlKpWRNhq63UPb3vYaY1NJHC12nexjWUdGm5jWW_wGpkFTyDN5sQRuGGAM4tQp-qcOPIlhtwlYUq03YmbzaSepodeeC7q2Pezy_rRjbCF5sMQ8A--ufwi8Ia4Ot</recordid><startdate>19880501</startdate><enddate>19880501</enddate><creator>Cost, J.R.</creator><creator>Brown, R.D.</creator><creator>Giorgi, A.L.</creator><creator>Stanley, J.T.</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>8FD</scope><scope>L7M</scope><scope>8BQ</scope><scope>JG9</scope><scope>OTOTI</scope></search><sort><creationdate>19880501</creationdate><title>Effects of neutron irradiation on Nd-Fe-B magnetic properties</title><author>Cost, J.R. ; Brown, R.D. ; Giorgi, A.L. ; Stanley, J.T.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c424t-5b051cd677949b310f805a6b1836aee21dde194aa5a5313e97074bcb6b9fb3cb3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1988</creationdate><topic>360106 - Metals & Alloys- Radiation Effects</topic><topic>ALLOY SYSTEMS</topic><topic>ALLOYS</topic><topic>Annealing</topic><topic>BORON ALLOYS</topic><topic>Coercive force</topic><topic>COHERENT SCATTERING</topic><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>Cross-disciplinary physics: materials science; rheology</topic><topic>DATA</topic><topic>DIFFRACTION</topic><topic>Domain effects, magnetization curves, and hysteresis</topic><topic>Exact sciences and technology</topic><topic>EXPERIMENTAL DATA</topic><topic>Inductors</topic><topic>INFORMATION</topic><topic>IRON ALLOYS</topic><topic>IRRADIATION</topic><topic>Laboratories</topic><topic>MAGNETIC PROPERTIES</topic><topic>Magnetic properties and materials</topic><topic>MAGNETS</topic><topic>Manufacturing</topic><topic>MATERIALS SCIENCE</topic><topic>Metals, semimetals and alloys</topic><topic>NEODYMIUM ALLOYS</topic><topic>NEUTRON DIFFRACTION</topic><topic>Neutrons</topic><topic>NUMERICAL DATA</topic><topic>Other topics in magnetic properties and materials</topic><topic>PERMANENT MAGNETS</topic><topic>PHYSICAL PROPERTIES</topic><topic>PHYSICAL RADIATION EFFECTS</topic><topic>Physics</topic><topic>RADIATION EFFECTS</topic><topic>RARE EARTH ALLOYS</topic><topic>Remanence</topic><topic>SCATTERING</topic><topic>Specific materials</topic><topic>Temperature measurement</topic><topic>TERNARY ALLOY SYSTEMS</topic><toplevel>online_resources</toplevel><creatorcontrib>Cost, J.R.</creatorcontrib><creatorcontrib>Brown, R.D.</creatorcontrib><creatorcontrib>Giorgi, A.L.</creatorcontrib><creatorcontrib>Stanley, J.T.</creatorcontrib><creatorcontrib>Los Alamos National Labs., Los Alamos, NM (US)</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>METADEX</collection><collection>Materials Research Database</collection><collection>OSTI.GOV</collection><jtitle>IEEE Trans. Magn.; (United States)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Cost, J.R.</au><au>Brown, R.D.</au><au>Giorgi, A.L.</au><au>Stanley, J.T.</au><aucorp>Los Alamos National Labs., Los Alamos, NM (US)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of neutron irradiation on Nd-Fe-B magnetic properties</atitle><jtitle>IEEE Trans. Magn.; (United States)</jtitle><stitle>TMAG</stitle><date>1988-05-01</date><risdate>1988</risdate><volume>24</volume><issue>3</issue><spage>2016</spage><epage>2019</epage><pages>2016-2019</pages><issn>0018-9464</issn><eissn>1941-0069</eissn><coden>IEMGAQ</coden><abstract>Nd-Fe-B permanent magnets from two different manufacturers were irradiated in the Omega West reactor at Los Alamos National Laboratory, with fast neutrons at temperatures of 426 K (153 degrees C) and 350 K (77 degrees C) to fluences of 5.0*10/sup 16/ N/cm/sup 2/ and 6.1*10/sup 16/ N/cm/sup 2/, respectively. At intervals during the irradiation the samples were removed from the reactor and the remanence measured at room temperature. The initial loss of remanence for irradiation at 426 K was 10% for a fluence of 10/sup 15/ N/cm/sup 2/. At 350 K the initial loss rate was roughly half this value. The loss rates were nearly the same for samples from the two different manufacturers. These losses are due to the irradiation since the remanence does not decay with annealing at 426 K. Remagnetization after irradiation results in full recovery of the remanence and roughly a 20% increase in the coercivity. Evidence from this experiment suggests that the primary mechanism for loss of remanence is nucleation of reverse domains by the collision cascade and subsequent growth into the original domain.< ></abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/20.3393</doi><tpages>4</tpages></addata></record> |
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| issn | 0018-9464 1941-0069 |
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| subjects | 360106 - Metals & Alloys- Radiation Effects ALLOY SYSTEMS ALLOYS Annealing BORON ALLOYS Coercive force COHERENT SCATTERING Condensed matter: electronic structure, electrical, magnetic, and optical properties Cross-disciplinary physics: materials science rheology DATA DIFFRACTION Domain effects, magnetization curves, and hysteresis Exact sciences and technology EXPERIMENTAL DATA Inductors INFORMATION IRON ALLOYS IRRADIATION Laboratories MAGNETIC PROPERTIES Magnetic properties and materials MAGNETS Manufacturing MATERIALS SCIENCE Metals, semimetals and alloys NEODYMIUM ALLOYS NEUTRON DIFFRACTION Neutrons NUMERICAL DATA Other topics in magnetic properties and materials PERMANENT MAGNETS PHYSICAL PROPERTIES PHYSICAL RADIATION EFFECTS Physics RADIATION EFFECTS RARE EARTH ALLOYS Remanence SCATTERING Specific materials Temperature measurement TERNARY ALLOY SYSTEMS |
| title | Effects of neutron irradiation on Nd-Fe-B magnetic properties |
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