Planar XY magnetic glass state in the Gd 2 ScNbO 7 pyrochlore.

Autor: Mauws C; Chemistry, University of Manitoba, 144 Dysart Road, Winnipeg, Manitoba, R3T 2N2, CANADA., Beare J; Department of Physics and Astronomy, Hamilton, 1280 Main St W, Hamilton, L8S 4L8, CANADA., Rutherford M; The University of Winnipeg Department of Chemistry, 599 Portage Ave W, Winnipeg, Manitoba, R3B 2G3, CANADA., Su Y; Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science (JCNS), Outstation at MLZ, Lichtenbergstraße 1, Garching, D-85747, GERMANY., Sharma S; Department of Physics and Astronomy, McMaster University, 1280 Main St W, Hamilton, Ontario, L8S 4L8, CANADA., Nugent M; Department of Physics and Astronomy, McMaster University, 1280 Main St W, Hamilton, Ontario, L8S 4L8, CANADA., Lee MK; National Cheng Kung University, Department of Physics, Taiwan, 70101, TAIWAN., Chang LJ; Department of Physics, National Cheng Kung University, Department of Physics, 1 University Road, 701 Tainan, Taiwan, Tainan, 70101, TAIWAN., Dunsiger S; TRIUMF, University of British Columbia, Vancouver, British Columbia, V6T 2A3, CANADA., Gardner JS; Neutron platform, Songshan Lake Materials Laboratory, Building A, Dongguan, Guangdong, 510730, CHINA., Luke G; Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Hamilton, Ontario, L8S 4L8, CANADA., Wiebe CR; Chemistry, University of Winnipeg, 515 Portage Ave, Winnipeg, Manitoba, R3B 2E9, CANADA.
Jazyk: angličtina
Zdroj: Journal of physics. Condensed matter : an Institute of Physics journal [J Phys Condens Matter] 2024 Sep 04. Date of Electronic Publication: 2024 Sep 04.
DOI: 10.1088/1361-648X/ad7771
Abstrakt: Here a spin glass system with emergent planar ordered spin clusters is investigated. The mixed B-site pyrochlore Gd 2 ScNbO 7 has been synthesized and characterized through a variety of techniques, including x-ray diffraction, magnetic susceptibility, muon spin relaxation, heat capacity and neutron scattering. Despite a Curie-Weiss temperature of -3.93(3) K, indicating net antiferromagnetic interactions, no signs of long ranged magnetic ordering are found down to T = 0.3 K. Instead, a disordered magnetic state emerges with a small correlation length of 2.1(1) Angstroms of single tetrahedra. A RMC analysis of the polarized neutron scattering data reveals short-range antiferromagnetic order with emergent XY spin ordering similar to the parent pyrochlore compounds. Muon spin relaxation, and AC susceptibility measurements confirm that the magnetization condenses into a glass, with 10 % of the potential entropy missing in the specific heat. This magnetic ground state is similar to what is observed in Gd 2 Sn 2 O 7 just above the ordering temperature, without the eventual long-range ordering at low temperature. .
(Creative Commons Attribution license.)
Databáze: MEDLINE
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