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Title: Magnetic order and interactions in ferrimagnetic Mn 3 Si 2 Te 6

Journal Article · · Physical Review B

The magnetism in Mn3Si2Te6 has been investigated using thermodynamic measurements, first principles calculations, neutron diffraction and diffuse neutron scattering on single crystals. These data con rm that Mn3Si2Te6 is a ferrimagnet below TC 78 K. The magnetism is anisotropic, with magnetization and neutron diffraction demonstrating that the moments lie within the basal plane of the trigonal structure. The saturation magnetization of 1.6 B/Mn at 5K originates from the different multiplicities of the two antiferromagnetically-aligned Mn sites. First principles calculations reveal antiferromagnetic exchange for the three nearest Mn-Mn pairs, which leads to a competition between the ferrimagnetic ground state and three other magnetic configurations. The ferrimagnetic state results from the energy associated with the third-nearest neighbor interaction, and thus long- range interactions are essential for the observed behavior. Di use magnetic scattering is observed around the 002 Bragg reflection at 120 K, which indicates the presence of strong spin correlations well above TC . These are promoted by the competing ground states that result in a relative suppression of TC , and may be associated with a small ferromagnetic component that produces anisotropic magnetism below ≈ 330 K.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1362242
Alternate ID(s):
OSTI ID: 1372516
Journal Information:
Physical Review B, Vol. 95, Issue 17; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 29 works
Citation information provided by
Web of Science

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Cited By (3)

Tuning magnetocrystalline anisotropy by cobalt alloying in hexagonal Fe3Ge1 journal September 2018
Emergence of Kondo lattice behavior in a van der Waals itinerant ferromagnet, Fe 3 GeTe 2 journal January 2018
Magnetic Properties of Proton Irradiated Mn3Si2Te6 van der Waals Single Crystals journal January 2019