Exchange bias up to room temperature in antiferromagnetic hexagonal Mn3Ge
| Autor: | Guido Kreiner, Claudia Felser, Ajaya K. Nayak, Jin Feng Qian, Walter Schnelle |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Acoustics and Ultrasonics Condensed matter physics Hexagonal crystal system Exchange interaction Intermetallic Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Tetragonal crystal system Exchange bias Ferromagnetism Ferrimagnetism Antiferromagnetism Condensed Matter::Strongly Correlated Electrons |
| Zdroj: | Journal of Physics D: Applied Physics. 47:305001 |
| ISSN: | 1361-6463 0022-3727 |
| DOI: | 10.1088/0022-3727/47/30/305001 |
| Popis: | This work reports an exchange bias (EB) effect up to room temperature in the binary intermetallic bulk compound Mn3.04Ge0.96. The sample annealed at 700 K crystallizes in a tetragonal structure with ferromagnetic ordering, whereas, the sample annealed at 1073 K crystallizes in a hexagonal structure with antiferromagnetic ordering. The hexagonal Mn3.04Ge0.96 sample exhibits an EB of around 70 mT at 2 K that continues with a non-zero value up to room temperature. The exchange anisotropy is proposed to be originating from the exchange interaction between the triangular antiferromagnetic host and the embedded ferrimagnetic like clusters. The ferrimagnetic clusters develop when excess Mn atoms occupy empty Ge sites in the original triangular antiferromagnet structure of Mn3Ge. |
| Databáze: | OpenAIRE |
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