Growth and giant coercive field of spinel-structured Co3−x Mn x O4 thin films
| Autor: | Tae-Yeong Koo, Yongsu Kwak, Jonghyun Song |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Spinel Analytical chemistry General Physics and Astronomy 02 engineering and technology Substrate (electronics) Coercivity engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Pulsed laser deposition Nuclear magnetic resonance 0103 physical sciences engineering Curie temperature Thin film 0210 nano-technology Anisotropy Single crystal |
| Zdroj: | Journal of the Korean Physical Society. 69:263-267 |
| ISSN: | 1976-8524 0374-4884 |
| DOI: | 10.3938/jkps.69.263 |
| Popis: | We grew epitaxial thin films of CoMn2O4 and Co2MnO4 on Nb-doped SrTiO3(011) and SrTiO3(001) single crystal substrates using pulsed laser deposition. The magnetic Curie temperature (T c ) of the Co2MnO4 thin films was ~176 K, which is higher than that of the bulk whereas CoMn2O4 thin films exhibited a value of T c (~151 K) lower than that of the bulk. For the Co2MnO4 thin films, the M − H loop showed a coercive field of ~0.7 T at 10 K, similar to the value for the bulk. However, the M −H loop of the CoMn2O4(0ll) thin film grown on a Nb-doped SrTiO3(011) substrate exhibited a coercive field of ~4.5 T at 30 K, which is significantly higher than those of the Co2MnO4 thin film and bulk. This giant coercive field, only observed for the CoMn2O4(0ll) thin film, can be attributed to the shape anisotropy and strong spin-orbit coupling. |
| Databáze: | OpenAIRE |
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