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DC Field | Value | Language |
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dc.citation.endPage | 187 | - |
dc.citation.startPage | 177 | - |
dc.citation.title | JOURNAL OF ELECTRONIC MATERIALS | - |
dc.citation.volume | 52 | - |
dc.contributor.author | Manh, T., V | - |
dc.contributor.author | Pham, Y. | - |
dc.contributor.author | Phan, T. L. | - |
dc.contributor.author | Dang, N. T. | - |
dc.contributor.author | Tran, N. | - |
dc.contributor.author | Park, H. R. | - |
dc.contributor.author | Lee, B. W. | - |
dc.contributor.author | Yu, S. C. | - |
dc.date.accessioned | 2023-12-21T13:10:35Z | - |
dc.date.available | 2023-12-21T13:10:35Z | - |
dc.date.created | 2022-11-14 | - |
dc.date.issued | 2023-01 | - |
dc.description.abstract | We present a study on the magnetic and magnetocaloric characters of Sm1-xSrxCoO3 (x=0.4-0.6) synthesized by solid-state reactions. Recorded M(T) data at H=100 Oe show an increase of the Curie temperature (T-C) from 143 K for x=0.4 to 153 K for x=0.5, but a higher x value (x = 0.6) reduces T-C to similar to 92 K. A singularity region sandwiched between the Griffiths and pure paramagnetic phases has been observed in x=0.4, but it becomes invisible at x=0.5 and 0.6. These properties are assigned to a competition between ferromagnetic and anti-ferromagnetic interactions induced by Co3+ and Co4+ ions. The Co3+/Co4+ mixed valence has been confirmed upon the analysis of Co K-edge x-ray absorption spectra. Using Maxwell's relations and M(H) data, we have calculated the absolute magnetic entropy change (vertical bar Delta S-m vertical bar). Around T-C, the maximum magnetic entropy changes (vertical bar Delta S-max vertical bar) of x=0.4, 0.5 and 0.6 are about 1.19, 1.22 and 0.81 J/kg K for H =50 kOe, respectively. The values of the relative cooling power are in the range of 58 - 93 J/kg. Our analyses also indicate all vertical bar Delta S-m (T, H)vertical bar data obeying the universal master curve as constructing the vertical bar Delta S-m vertical bar/vertical bar Delta S-max vertical bar vs. theta plots, where theta is defined as the reduced temperature. When considering exponential parameters N(T, H) and n associated with vertical bar Delta S-m(T, H)vertical bar and vertical bar Delta S-max(H)vertical bar, respectively, we have found their values are different from the mean-field theory value n = 2/3. These results prove the Sm1-xSrxCoO3 samples have the second-order nature and short-range magnetic order. | - |
dc.identifier.bibliographicCitation | JOURNAL OF ELECTRONIC MATERIALS, v.52, pp.177 - 187 | - |
dc.identifier.doi | 10.1007/s11664-022-09943-7 | - |
dc.identifier.issn | 0361-5235 | - |
dc.identifier.scopusid | 2-s2.0-85140112463 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/60680 | - |
dc.identifier.wosid | 000869590200001 | - |
dc.language | 영어 | - |
dc.publisher | SPRINGER | - |
dc.title | Electronic Structure and Magnetocaloric Effect of Sr-Doped SmCoO3 Perovskites | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied | - |
dc.relation.journalResearchArea | Engineering; Materials Science; Physics | - |
dc.type.docType | Article; Early Access | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Hole-doped cobaltite | - |
dc.subject.keywordAuthor | electronic structure | - |
dc.subject.keywordAuthor | magnetic and magnetocaloric behaviors | - |
dc.subject.keywordPlus | ABSORPTION FINE-STRUCTURE | - |
dc.subject.keywordPlus | CRITICAL-BEHAVIOR | - |
dc.subject.keywordPlus | SPIN-STATE | - |
dc.subject.keywordPlus | SPONTANEOUS MAGNETIZATION | - |
dc.subject.keywordPlus | LA1-XSRXCOO3 | - |
dc.subject.keywordPlus | LACOO3 | - |
dc.subject.keywordPlus | POLYCRYSTALLINE | - |
dc.subject.keywordPlus | REFRIGERATION | - |
dc.subject.keywordPlus | TRANSITION | - |
dc.subject.keywordPlus | TRANSPORT | - |
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