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

Abstract

The magnetism in Mn 3Si 2Te 6 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 T C 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 T C . These are promoted by the competing ground states that result in a relative suppression of T C , and may be associated with a small ferromagnetic component that produces anisotropic magnetism below ≈ 330 K.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1362242
Alternate Identifier(s):
OSTI ID: 1372516
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 17; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

May, Andrew F., Liu, Yaohua, Calder, Stuart, Parker, David S., Pandey, Tribhuwan, Cakmak, Ercan, Cao, Huibo, Yan, Jiaqiang, and McGuire, Michael A. Magnetic order and interactions in ferrimagnetic Mn3Si2Te6. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.174440.
May, Andrew F., Liu, Yaohua, Calder, Stuart, Parker, David S., Pandey, Tribhuwan, Cakmak, Ercan, Cao, Huibo, Yan, Jiaqiang, & McGuire, Michael A. Magnetic order and interactions in ferrimagnetic Mn3Si2Te6. United States. doi:10.1103/PhysRevB.95.174440.
May, Andrew F., Liu, Yaohua, Calder, Stuart, Parker, David S., Pandey, Tribhuwan, Cakmak, Ercan, Cao, Huibo, Yan, Jiaqiang, and McGuire, Michael A. Mon . "Magnetic order and interactions in ferrimagnetic Mn3Si2Te6". United States. doi:10.1103/PhysRevB.95.174440. https://www.osti.gov/servlets/purl/1362242.
@article{osti_1362242,
title = {Magnetic order and interactions in ferrimagnetic Mn3Si2Te6},
author = {May, Andrew F. and Liu, Yaohua and Calder, Stuart and Parker, David S. and Pandey, Tribhuwan and Cakmak, Ercan and Cao, Huibo and Yan, Jiaqiang and McGuire, Michael A.},
abstractNote = {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.},
doi = {10.1103/PhysRevB.95.174440},
journal = {Physical Review B},
number = 17,
volume = 95,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2017},
month = {Mon May 01 00:00:00 EDT 2017}
}

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Works referenced in this record:

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