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Magnetic structures of geometrically frustrated SrGd2O4 derived from powder and single-crystal neutron diffraction

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Qureshi, N., Malkin, B. Z., Riberolles, S. X. M., Ritter, C., Ouladdiaf, B., Balakrishnan, Geetha, Hatnean, Monica Ciomaga and Petrenko, Oleg (2022) Magnetic structures of geometrically frustrated SrGd2O4 derived from powder and single-crystal neutron diffraction. Physical Review B, 105 (1). 014425. doi:10.1103/PhysRevB.105.014425

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Official URL: http://dx.doi.org/10.1103/PhysRevB.105.014425

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Abstract

We present the low-temperature magnetic structures of SrGd2O4 combining neutron diffraction methods on polycrystalline and single-crystal samples containing the 160Gd isotope. In contrast to other members of the SrLn2O4 family (Ln = lanthanide) this system reveals two long-range ordered magnetic phases, which our diffraction data unambiguously identify. Below TN1 = 2.73 K, a q1 = (0 0 0) magnetic structure is stabilized where ferromagnetic chains along the c axis (space group Pnam) are coupled antiferromagnetically with neighboring chains. On cooling below TN2 = 0.48 K, an additional incommensurate component modulated by q2 = (0 0 0.42) evolves and is aligned along either of the perpendicular axes for the two different Gd sites, resulting in a fanlike magnetic structure. The identification of the particular Gd sites with the magnetic order observed with neutron diffraction is facilitated by a detailed analysis of the crystal fields acting on the sites. The observed ordering phenomena underline the complex multiaxial anisotropy in this system.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Rare earths , Rare earths -- Magnetic properties, Neutrons -- Diffraction , Polycrystals , Ferromagnetism , Anisotropy
Journal or Publication Title: Physical Review B
Publisher: American Physical Society
ISSN: 2469-9950
Official Date: 1 January 2022
Dates:
DateEvent
1 January 2022Published
20 January 2022Available
3 January 2022Accepted
Volume: 105
Number: 1
Article Number: 014425
DOI: 10.1103/PhysRevB.105.014425
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Copyright Holders: © 2022 American Physical Society
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
EP/M028771/1 [EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/T005963/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
19-12-00244Russian Science Foundationhttp://dx.doi.org/10.13039/501100006769

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