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Stinshoff, Rolf; Fecher, Gerhard H.; Chadov, Stanislav; Nayak, Ajaya K.; Balke, Benjamin; Ouardi, Siham; Nakamura, Tetsuya; Felser, Claudia
AIP advances, 10/2017, Volume: 7, Issue: 10Journal Article
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.
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