Interplay of structural chemistry and magnetism in perovskites; a study of CaLn2Ni2WO9; Ln = La, Pr, Nd
Polycrystalline samples of CaLn2Ni2WO9 (Ln = La, Pr, Nd) have been synthesized and characterised by a combination of X-ray and neutron diffraction, electron microscopy and magnetometry. Each composition adopts a perovskite-like structure with a ~5.50, b ~5.56, c ~7.78 Å, β ~90.1 ° in space group P21...
| Main Authors: | , , , , |
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| Format: | Journal article |
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Elsevier
2017
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| _version_ | 1826290973330636800 |
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| author | Chin, C Paria Sena, R Hunter, E Hadermann, J Battle, P |
| author_facet | Chin, C Paria Sena, R Hunter, E Hadermann, J Battle, P |
| author_sort | Chin, C |
| collection | OXFORD |
| description | Polycrystalline samples of CaLn2Ni2WO9 (Ln = La, Pr, Nd) have been synthesized and characterised by a combination of X-ray and neutron diffraction, electron microscopy and magnetometry. Each composition adopts a perovskite-like structure with a ~5.50, b ~5.56, c ~7.78 Å, β ~90.1 ° in space group P21/n. Of the two crystallographically distinct six-coordinate sites, one is occupied entirely (Ln = Pr) or predominantly (Ln = La, Nd) by Ni2+ and the other by Ni2+ and W6+ in a ratio of approximately 1:2. None of the compounds shows long-range magnetic order at 5 K. The magnetometry data show that the magnetic moments of the Ni2+ cations form a spin glass below ~ 30 K in each case. The Pr3+ moments in CaPr2Ni2WO9 also freeze but the Nd3+ moments in CaNd2Ni2WO9 do not. This behaviour is contrasted with that observed in other (A,A’)B2B’O9 perovskites. |
| first_indexed | 2024-03-07T02:52:23Z |
| format | Journal article |
| id | oxford-uuid:ae1ab8cc-1215-4f91-b944-615a61e00123 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T02:52:23Z |
| publishDate | 2017 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:ae1ab8cc-1215-4f91-b944-615a61e001232022-03-27T03:40:23ZInterplay of structural chemistry and magnetism in perovskites; a study of CaLn2Ni2WO9; Ln = La, Pr, NdJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:ae1ab8cc-1215-4f91-b944-615a61e00123Symplectic Elements at OxfordElsevier2017Chin, CParia Sena, RHunter, EHadermann, JBattle, PPolycrystalline samples of CaLn2Ni2WO9 (Ln = La, Pr, Nd) have been synthesized and characterised by a combination of X-ray and neutron diffraction, electron microscopy and magnetometry. Each composition adopts a perovskite-like structure with a ~5.50, b ~5.56, c ~7.78 Å, β ~90.1 ° in space group P21/n. Of the two crystallographically distinct six-coordinate sites, one is occupied entirely (Ln = Pr) or predominantly (Ln = La, Nd) by Ni2+ and the other by Ni2+ and W6+ in a ratio of approximately 1:2. None of the compounds shows long-range magnetic order at 5 K. The magnetometry data show that the magnetic moments of the Ni2+ cations form a spin glass below ~ 30 K in each case. The Pr3+ moments in CaPr2Ni2WO9 also freeze but the Nd3+ moments in CaNd2Ni2WO9 do not. This behaviour is contrasted with that observed in other (A,A’)B2B’O9 perovskites. |
| spellingShingle | Chin, C Paria Sena, R Hunter, E Hadermann, J Battle, P Interplay of structural chemistry and magnetism in perovskites; a study of CaLn2Ni2WO9; Ln = La, Pr, Nd |
| title | Interplay of structural chemistry and magnetism in
perovskites; a study of CaLn2Ni2WO9; Ln = La,
Pr, Nd |
| title_full | Interplay of structural chemistry and magnetism in
perovskites; a study of CaLn2Ni2WO9; Ln = La,
Pr, Nd |
| title_fullStr | Interplay of structural chemistry and magnetism in
perovskites; a study of CaLn2Ni2WO9; Ln = La,
Pr, Nd |
| title_full_unstemmed | Interplay of structural chemistry and magnetism in
perovskites; a study of CaLn2Ni2WO9; Ln = La,
Pr, Nd |
| title_short | Interplay of structural chemistry and magnetism in
perovskites; a study of CaLn2Ni2WO9; Ln = La,
Pr, Nd |
| title_sort | interplay of structural chemistry and magnetism in perovskites a study of caln2ni2wo9 ln la pr nd |
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