Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 478, Issue -, Pages 55-58Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2019.01.088
Keywords
Heusler alloys; Spintronics; Transport properties; Magnetic frustration
Funding
- Russian Science Foundation [16-42-02035]
- DST [INT/RUS/RSF/P-06]
- Act 211 Government of the Russian Federation [02.A03.21.0011]
- Russian Science Foundation [16-42-02035] Funding Source: Russian Science Foundation
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Experimental studies of polycrystalline Mn2FeAl revealed that it crystallizes in a primitive cubic structure of beta-Mn type (space group P4(1)32) and is an antiferromagnet with Neel temperature T-N = 40 K. The alloy exhibits temperature dependence of transport properties typical for semiconductors and has abnormally high electrical resistivity (rho similar to 238 mu Omega.cm at room temperature). High Curie-Weiss temperature Theta(CW) similar to -905 K and a large value of the frustration parameter f approximate to 23 points to a strong frustration of the magnetic subsystem. These experimental findings are in contrast with reported results of first-principles calculations which predicted Mn2FeAl to be half metallic ferrimagnet crystallizing in the Heusler crystal structure.
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