Anisotropic fully dense MnBi permanent magnet with high energy product and high coercivity at elevated temperatures
The structural and magnetic properties of a fully dense anisotropic MnBi magnet prepared by hot compaction are investigated. Arc-melting and low energy ball milling are employed to synthesize highly anisotropic MnBi powders with very high remanence ratio (Mr/Ms) of 0.97, coercivity (Hc) of 11.7 kOe...
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| Veröffentlicht in: | Journal of physics. D, Applied physics Applied physics, 2013-02, Vol.46 (6), p.62001-1-4 |
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| container_end_page | 1-4 |
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| container_issue | 6 |
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| container_title | Journal of physics. D, Applied physics |
| container_volume | 46 |
| creator | Rama Rao, N V Gabay, A M Hadjipanayis, G C |
| description | The structural and magnetic properties of a fully dense anisotropic MnBi magnet prepared by hot compaction are investigated. Arc-melting and low energy ball milling are employed to synthesize highly anisotropic MnBi powders with very high remanence ratio (Mr/Ms) of 0.97, coercivity (Hc) of 11.7 kOe and maximum energy product [(BH)max] of 9 MG Oe. The bulk magnet fabricated from these powders displays anisotropic characteristics with high Mr/Ms ratio of 0.91 and a (BH)max of 5.8 MG Oe at room temperature. The Hc of bulk magnet increases linearly from 6.5 kOe at 300 K to 28.3 kOe at 530 K with a (BH)max of 3.6 MG Oe at 530 K. Analysis of the temperature dependence of Hc suggests the nucleation of reversed domains as the dominant mechanism for the magnetization reversal. |
| doi_str_mv | 10.1088/0022-3727/46/6/062001 |
| format | Article |
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Arc-melting and low energy ball milling are employed to synthesize highly anisotropic MnBi powders with very high remanence ratio (Mr/Ms) of 0.97, coercivity (Hc) of 11.7 kOe and maximum energy product [(BH)max] of 9 MG Oe. The bulk magnet fabricated from these powders displays anisotropic characteristics with high Mr/Ms ratio of 0.91 and a (BH)max of 5.8 MG Oe at room temperature. The Hc of bulk magnet increases linearly from 6.5 kOe at 300 K to 28.3 kOe at 530 K with a (BH)max of 3.6 MG Oe at 530 K. Analysis of the temperature dependence of Hc suggests the nucleation of reversed domains as the dominant mechanism for the magnetization reversal.</description><identifier>ISSN: 0022-3727</identifier><identifier>EISSN: 1361-6463</identifier><identifier>DOI: 10.1088/0022-3727/46/6/062001</identifier><identifier>CODEN: JPAPBE</identifier><language>eng</language><publisher>Bristol: IOP Publishing</publisher><subject>Anisotropy ; Ball milling ; Coercive force ; Coercivity ; Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Displays ; Domain effects, magnetization curves, and hysteresis ; Exact sciences and technology ; Magnetic properties ; Magnetic properties and materials ; Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects ; Nucleation ; Permanent magnets ; Physics ; Studies of specific magnetic materials</subject><ispartof>Journal of physics. 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D, Applied physics</title><addtitle>JPhysD</addtitle><addtitle>J. Phys. D: Appl. Phys</addtitle><description>The structural and magnetic properties of a fully dense anisotropic MnBi magnet prepared by hot compaction are investigated. Arc-melting and low energy ball milling are employed to synthesize highly anisotropic MnBi powders with very high remanence ratio (Mr/Ms) of 0.97, coercivity (Hc) of 11.7 kOe and maximum energy product [(BH)max] of 9 MG Oe. The bulk magnet fabricated from these powders displays anisotropic characteristics with high Mr/Ms ratio of 0.91 and a (BH)max of 5.8 MG Oe at room temperature. The Hc of bulk magnet increases linearly from 6.5 kOe at 300 K to 28.3 kOe at 530 K with a (BH)max of 3.6 MG Oe at 530 K. Analysis of the temperature dependence of Hc suggests the nucleation of reversed domains as the dominant mechanism for the magnetization reversal.</description><subject>Anisotropy</subject><subject>Ball milling</subject><subject>Coercive force</subject><subject>Coercivity</subject><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Displays</subject><subject>Domain effects, magnetization curves, and hysteresis</subject><subject>Exact sciences and technology</subject><subject>Magnetic properties</subject><subject>Magnetic properties and materials</subject><subject>Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects</subject><subject>Nucleation</subject><subject>Permanent magnets</subject><subject>Physics</subject><subject>Studies of specific magnetic materials</subject><issn>0022-3727</issn><issn>1361-6463</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNqFkEFLJDEQhYO44Di7P2EhF8FL7ySddDpzVNFVULy455CkKzOR7nSbpJX595uhxaunguJ7r-o9hH5T8ocSKTeE1HXF2rrdcLERGyJqQugJWlEmaCW4YKdo9cWcofOUXgkhjZB0hdJV8GnMcZy8xW7u-wPuICTAT-Ha4wnioAOEjAe9C5Dxh897vPe7PYYAcXfAUxy72WasQ7fs7QjR-nefD1hnDD286wwdzjAUM53nCOkn-uF0n-DX51yjf3e3Lzf31ePz34ebq8fKskbmyrraOWZoR43h3EjOpGlly7dN22jjmLWmI6Z1oiB8SxvGnTQlPHdcb21H2BpdLr7lybcZUlaDTxb6vkQa56Qoq1nNCWWyoM2C2jimFMGpKfpBx4OiRB1LVscC1bFAxYUSaim56C4-T-hkde-iDtanL3EttgViTeHowvlxUq_jHEMJ_o33f7V4jSM</recordid><startdate>20130213</startdate><enddate>20130213</enddate><creator>Rama Rao, N V</creator><creator>Gabay, A M</creator><creator>Hadjipanayis, G C</creator><general>IOP Publishing</general><general>Institute of Physics</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20130213</creationdate><title>Anisotropic fully dense MnBi permanent magnet with high energy product and high coercivity at elevated temperatures</title><author>Rama Rao, N V ; Gabay, A M ; Hadjipanayis, G C</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c358t-cf2ff3b1d1bb44b8438b78749575abf3ccbd0b7f6b1d491534f8b0624f4a9cd03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Anisotropy</topic><topic>Ball milling</topic><topic>Coercive force</topic><topic>Coercivity</topic><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>Displays</topic><topic>Domain effects, magnetization curves, and hysteresis</topic><topic>Exact sciences and technology</topic><topic>Magnetic properties</topic><topic>Magnetic properties and materials</topic><topic>Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects</topic><topic>Nucleation</topic><topic>Permanent magnets</topic><topic>Physics</topic><topic>Studies of specific magnetic materials</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Rama Rao, N V</creatorcontrib><creatorcontrib>Gabay, A M</creatorcontrib><creatorcontrib>Hadjipanayis, G C</creatorcontrib><collection>Pascal-Francis</collection><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 physics. D, Applied physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Rama Rao, N V</au><au>Gabay, A M</au><au>Hadjipanayis, G C</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Anisotropic fully dense MnBi permanent magnet with high energy product and high coercivity at elevated temperatures</atitle><jtitle>Journal of physics. D, Applied physics</jtitle><stitle>JPhysD</stitle><addtitle>J. Phys. D: Appl. Phys</addtitle><date>2013-02-13</date><risdate>2013</risdate><volume>46</volume><issue>6</issue><spage>62001</spage><epage>1-4</epage><pages>62001-1-4</pages><issn>0022-3727</issn><eissn>1361-6463</eissn><coden>JPAPBE</coden><abstract>The structural and magnetic properties of a fully dense anisotropic MnBi magnet prepared by hot compaction are investigated. Arc-melting and low energy ball milling are employed to synthesize highly anisotropic MnBi powders with very high remanence ratio (Mr/Ms) of 0.97, coercivity (Hc) of 11.7 kOe and maximum energy product [(BH)max] of 9 MG Oe. The bulk magnet fabricated from these powders displays anisotropic characteristics with high Mr/Ms ratio of 0.91 and a (BH)max of 5.8 MG Oe at room temperature. The Hc of bulk magnet increases linearly from 6.5 kOe at 300 K to 28.3 kOe at 530 K with a (BH)max of 3.6 MG Oe at 530 K. Analysis of the temperature dependence of Hc suggests the nucleation of reversed domains as the dominant mechanism for the magnetization reversal.</abstract><cop>Bristol</cop><pub>IOP Publishing</pub><doi>10.1088/0022-3727/46/6/062001</doi><tpages>4</tpages></addata></record> |
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| issn | 0022-3727 1361-6463 |
| language | eng |
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| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link |
| subjects | Anisotropy Ball milling Coercive force Coercivity Condensed matter: electronic structure, electrical, magnetic, and optical properties Displays Domain effects, magnetization curves, and hysteresis Exact sciences and technology Magnetic properties Magnetic properties and materials Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects Nucleation Permanent magnets Physics Studies of specific magnetic materials |
| title | Anisotropic fully dense MnBi permanent magnet with high energy product and high coercivity at elevated temperatures |
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