Abstract
Y2Co3 is a newly discovered antiferromagnetic (AFM) compound with distorted kagome layers. Previous investigations via bulk magnetization measurements suggested a complex noncollinear 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 interplane 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(3), 0] μB and [0, 1.25(4), 0.07(1)] μB. We attribute the previously reported "noncollinear"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.
| Original language | English |
|---|---|
| Article number | 235159 |
| Journal | Physical Review B |
| Volume | 110 |
| Issue number | 23 |
| DOIs | |
| State | Published - Dec 15 2024 |
Funding
We thank D. C. Johnston for useful discussions. Y.S. and V.T. acknowledge support from the UC Laboratory Fees Research Program (LFR-20-653926) and the UC Davis Physics Liquid Helium Laboratory Fund. Part of this research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. Work done at Ames National Laboratory (S.L.B. and P.C.C.) was supported by the U.S. Department of Energy, Office of Basic Energy Science, Division of Materials Sciences and Engineering. Ames Laboratory is operated for the U.S. Department of Energy by Iowa State University under Contract No. DE-AC02-07CH11358. The experimental research at the University of Utah received support from the National Science Foundation Division of Materials Research Award No. 2132692. This work was also supported by the U.S. Department of Energy (DOE) Office of Science, Fusion Energy Sciences funding award entitled High Energy Density Quantum Matter, Award No. DE-SC0020340. The experimental work took place at HPCAT (Sector 16, Advanced Photon Source, Argonne National Laboratory), which is supported by the DOE/National Nuclear Security Administration, Office of Experimental Sciences, with x-ray beam time and personnel support made possible by the Chicago/DOE Alliance Center, which is funded by the DOE/NNSA (DE-NA0003975). Instrumentation and facilities used were also supported by the National Science Foundation (Grant No. DMR-1809783). The Advanced Photon Source is operated by the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. The work of D.P. and L.Y. at Oak Ridge National Laboratory (first-principles calculations and interpretation) was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Science and Engineering Division. Measurements in pulsed magnetic fields were funded by DOE Basic Energy Sciences program \u201CScience of 100 tesla.\u201D