Anomalous temperature-dependent magnetization in the nearly collinear antiferromagnet Y2Co3
- University of California, Davis, CA (United States)
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Tohoku University, Sendai (Japan); National Sun Yat-sen University, Kaohsiung (Taiwan)
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- University of Utah, Salt Lake City, UT (United States)
- University of Utah, Salt Lake City, UT (United States); University of Illinois, Chicago, IL (United States)
- Iowa State University, Ames, IA (United States)
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- University of Illinois, Chicago, IL (United States)
- Tohoku University, Sendai (Japan)
Y2Co3 is a newly discovered antiferromagnetic (AFM) compound with distorted kagome layers. Here, previous investigations via bulk magnetization measurements suggested a complex non-collinear magnetic behavior, with magnetic moments primarily anti-aligned along the b axis and some canting towards the ac plane. In this study, we report the magnetic structure of Y2Co3 to be an A-type AFM structure with ferromagnetic (FM) interactions within the distorted kagome plane and an inter-plane antiferromagnetic interaction, as determined by single crystal neutron diffraction. The magnetic moments align along the b axis, with minimal canting towards the c axis, at odds with the previous interpretation of bulk magnetization measurements. The magnetic moments on the two distinct Co sites are (0, -0.68, 0) μB and (0, 1.25, 0.07) μB. We attribute the previously reported ”non-collinear” behavior to the considerable temperature dependence of itinerant AFM exchange interactions, induced by thermal contraction along the b axis. Additionally, our examination of lattice constants through pressure studies reveals compensating effects on FM and AFM interactions, resulting in negligible pressure dependence of TN.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States); Chicago Office, Argonne, IL (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); University of Illinois, Chicago, IL (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- Grant/Contract Number:
- AC02-06CH11357; AC02-07CH11358; NA0003975; NA0004153; SC0020340
- OSTI ID:
- 2507454
- Journal Information:
- Physical Review. B, Journal Name: Physical Review. B Journal Issue: 23 Vol. 110; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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