Composition-Dependent Crystal Structure and Magnetism in Nanocrystalline Co-Rich Alloy
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Chun, B. S. | - |
dc.contributor.author | Cho, J. U. | - |
dc.contributor.author | Kim, S. D. | - |
dc.contributor.author | Kim, Y. S. | - |
dc.contributor.author | Hwang, J. Y. | - |
dc.contributor.author | Kim, S. S. | - |
dc.contributor.author | Rhee, J. R. | - |
dc.contributor.author | Kim, T. W. | - |
dc.contributor.author | Hong, J. P. | - |
dc.contributor.author | Jung, M. H. | - |
dc.contributor.author | Kim, Y. K. | - |
dc.date.accessioned | 2021-09-08T13:14:54Z | - |
dc.date.available | 2021-09-08T13:14:54Z | - |
dc.date.created | 2021-06-11 | - |
dc.date.issued | 2009-10 | - |
dc.identifier.issn | 0018-9464 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/119255 | - |
dc.description.abstract | We report the magnetism of a ferromagnetic two phase mixture system by investigating the microstructural evolution and relevant property changes as a function of alloy composition in CoFeSiB film. The crystal structure evolved from an amorphous to hcp Co nanocrystal embedded two-phase mixture when Co concentration exceeded the critical amount (similar to 75 at.%) confirmed through TEM and XRD. Very low coercivity value was observed in the amorphous samples. The soft magnetic properties are due to the fact that the magnetic moments of Co-rich phase are exchange-coupled via the amorphous matrix, as a consequence the magnetic anisotropies are averaged out in the amorphous system. Meanwhile, beyond 75 at.% of Co, an abrupt increase in coercivity was observed in the nanocrystalline samples where highly anisotropic Co nanocrystals were precipitated. The hard magnetic properties resulted from the magnetic decoupling (breaking of the nanocrystal-amorphous matrix-nanocrystal coupling chain) because the exchange forces are not able to overcome the magnetocrystaline anisotropy. We also found that antiferromagnetic exchange coupling existed at the nanocrystal-amorphous matrix interfaces. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | - |
dc.subject | MAGNETIZATION | - |
dc.title | Composition-Dependent Crystal Structure and Magnetism in Nanocrystalline Co-Rich Alloy | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kim, Y. K. | - |
dc.identifier.doi | 10.1109/TMAG.2009.2024540 | - |
dc.identifier.wosid | 000270149700116 | - |
dc.identifier.bibliographicCitation | IEEE TRANSACTIONS ON MAGNETICS, v.45, no.10, pp.3862 - 3864 | - |
dc.relation.isPartOf | IEEE TRANSACTIONS ON MAGNETICS | - |
dc.citation.title | IEEE TRANSACTIONS ON MAGNETICS | - |
dc.citation.volume | 45 | - |
dc.citation.number | 10 | - |
dc.citation.startPage | 3862 | - |
dc.citation.endPage | 3864 | - |
dc.type.rims | ART | - |
dc.type.docType | Article; Proceedings Paper | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Engineering, Electrical & Electronic | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.subject.keywordPlus | MAGNETIZATION | - |
dc.subject.keywordAuthor | Co-alloy | - |
dc.subject.keywordAuthor | nanocrystalline | - |
dc.subject.keywordAuthor | negative remanence | - |
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