Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 823, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.153770
Keywords
Heusler alloys; Magnetic materials; Spintronics; Intermetallics
Categories
Funding
- NSF CAREER grant [ECCS 1846829]
- NSF DMREF grant [1235396]
- U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) [DE-FG02-06ER46291, DE-FG02-13ER46946]
- National Science Foundation [ACI-1548562]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1235396] Funding Source: National Science Foundation
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Search for low-moment magnetic materials with high spin-polarization is important for emerging spintronics applications. In this work, we have conducted detailed growth and characterization along with complementary first-principles calculations to investigate the structure and magnetism of Mn2FeSi, which is a prospective inverse-Heusler material. We confirm that Mn2FeSi adopts a cubic inverse-Heusler structure, in excellent agreement with theory. The magnetic and resistivity measurements show an antiferromagnetic behavior with a Neel temperature of 48 K, which is consistent with prior experimental reports. We find that a low-moment state with higher ordering temperature (150-200 K) can be stabilized under certain growth conditions. Supporting calculations show that Neel-type antiferromagnetic states are energetically very close to the ferrimagnetic ground state. Our work provides evidence that Mn2FeSi may be interesting for exploring newer applications with low-moment materials, but the ordering temperatures are low for viable practical applications. (C) 2020 Elsevier B.V. All rights reserved.
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