Half-metallic compensated ferrimagnetism with a tunable compensation point over a wide temperature range in the Mn-Fe-V-Al Heusler system
| Autor: | Ajaya K. Nayak, Rolf Stinshoff, Stanislav Chadov, Gerhard H. Fecher, Benjamin Balke, Claudia Felser, Siham Ouardi, Tetsuya Nakamura |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Spintronics Condensed matter physics General Physics and Astronomy 02 engineering and technology engineering.material Atmospheric temperature range 021001 nanoscience & nanotechnology Heusler compound 01 natural sciences lcsh:QC1-999 Compensation (engineering) Geomagnetic reversal Condensed Matter::Materials Science Hall effect Ferrimagnetism 0103 physical sciences engineering Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology Valence electron lcsh:Physics |
| Zdroj: | AIP Advances, Vol 7, Iss 10, Pp 105009-105009-15 (2017) |
| ISSN: | 2158-3226 |
| Popis: | The cubic Heusler compound Mn1.5FeV0.5Al with the L21 Heusler structure is the first fully compensated half-metallic ferrimagnet with 24 valence electrons. The ferrimagnetic state can be tuned by changing the composition such that the compensation point appears at finite temperatures ranging from 0 K up to 226 K, while retaining half-metallicity in the system. In this paper, the structural, magnetic and transport properties of the Mn-Fe-V-Al system are discussed. Magnetic reversal and a change of sign of the anomalous Hall effect were observed at the compensation point, which gives rise to a sublattice spin-crossing. These materials present new possibilities for potential spintronic devices because of their advantageous properties such as imperceptibility to external fields, lower power consumption and ultrafast switching in the THz region. |
| Databáze: | OpenAIRE |
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