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Structural, magnetic, magnetocaloric, and magnetostrictive properties of Pb1-xSrxMnBO4 (x = 0, 0.5, and 1.0)
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Head, Jake, Manuel, Pascal, Orlandi, Fabio, Jeong, Minki, Lees, Martin R., Li, Rukang and Greaves, Colin (2020) Structural, magnetic, magnetocaloric, and magnetostrictive properties of Pb1-xSrxMnBO4 (x = 0, 0.5, and 1.0). Chemistry of Materials, 32 (23). pp. 10184-10199. doi:10.1021/acs.chemmater.0c03701 ISSN 0897-4756.
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WRAP-Structural-magnetic-magnetocaloric-magnetostrictive-Lees-2020.pdf - Accepted Version - Requires a PDF viewer. Download (3423Kb) | Preview |
Official URL: http://dx.doi.org/10.1021/acs.chemmater.0c03701
Abstract
The solid solution Pb1-xSrxMnBO4 is reported with an orthorhombic, Pnma, structure throughout; here studies on compounds with x = 0, 0.5 and 1 are described. The structure contains chains of MnO6 octahedra that exhibit intra-chain ferromagnetic (FM) order at low temperatures. Neutron powder diffraction (NPD) reveals dominant FM order in PbMnBO4 (Tc = 30 K), whereas SrMnBO4 is primarily antiferromagnetic (AFM) with TN = 16 K; the difference is related to the link between the chains that involves the BO3 groups. PbMnBO4 has its moment along a but also has a previously unreported AFM contribution along c (magnetic space group Pnm'a'), whereas SrMnBO4 has its moment along a but also a FM canting along c (magnetic space group Pn'm'a). The end members show distinct magnetostriction at Tc/TN which correlates with the different magnetic exchange in these compounds. NPD in variable applied magnetic field shows that SrMnBO4 is converted to fully FM at 8 T. The behavior above the magnetic ordering temperature is consistent with short-range FM correlations within the chains, which is particularly apparent in PbMnBO4. The magnetocaloric effect (MCE) has been measured and compared with those previously reported for the mineral gaudefroyite. PbMnBO4 has excellent MCE behavior, especially near Tc, 30 K. The strong FM exchange within the chains and FM correlations above Tc are vital for the MC properties.
Item Type: | Journal Article | ||||||||||||
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Subjects: | Q Science > QC Physics | ||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||
Library of Congress Subject Headings (LCSH): | Neutrons -- Diffraction , Magnetic materials, Magnetic materials -- Magnetic properties, Magnetic materials -- Thermal properties | ||||||||||||
Journal or Publication Title: | Chemistry of Materials | ||||||||||||
Publisher: | American Chemical Society | ||||||||||||
ISSN: | 0897-4756 | ||||||||||||
Official Date: | 8 December 2020 | ||||||||||||
Dates: |
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Volume: | 32 | ||||||||||||
Number: | 23 | ||||||||||||
Page Range: | pp. 10184-10199 | ||||||||||||
DOI: | 10.1021/acs.chemmater.0c03701 | ||||||||||||
Status: | Peer Reviewed | ||||||||||||
Publication Status: | Published | ||||||||||||
Reuse Statement (publisher, data, author rights): | “This document is the Accepted Manuscript version of a Published Work that appeared in final form in Chemistry of Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see http://pubs.acs.org/page/policy/articlesonrequest/index.html].” | ||||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||||
Copyright Holders: | Copyright © 2020 American Chemical Society | ||||||||||||
Date of first compliant deposit: | 17 December 2020 | ||||||||||||
Date of first compliant Open Access: | 17 November 2021 | ||||||||||||
RIOXX Funder/Project Grant: |
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