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 P2 1 /n. O...
| Main Authors: | , , , , |
|---|---|
| Format: | Journal article |
| Published: |
Elsevier
2017
|
| _version_ | 1826260781442793472 |
|---|---|
| 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 P2 1 /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 Pr 3+ 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'O 9 perovskites. |
| first_indexed | 2024-03-06T19:11:10Z |
| format | Journal article |
| id | oxford-uuid:16d055ab-16ec-483f-8b70-65c4f0610dbb |
| institution | University of Oxford |
| last_indexed | 2024-03-06T19:11:10Z |
| publishDate | 2017 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:16d055ab-16ec-483f-8b70-65c4f0610dbb2022-03-26T10:33:37ZInterplay of structural chemistry and magnetism in perovskites; A study of CaLn2Ni2WO9; Ln=La, Pr, NdJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:16d055ab-16ec-483f-8b70-65c4f0610dbbSymplectic 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 P2 1 /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 Pr 3+ 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'O 9 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 |
| work_keys_str_mv | AT chinc interplayofstructuralchemistryandmagnetisminperovskitesastudyofcaln2ni2wo9lnlaprnd AT pariasenar interplayofstructuralchemistryandmagnetisminperovskitesastudyofcaln2ni2wo9lnlaprnd AT huntere interplayofstructuralchemistryandmagnetisminperovskitesastudyofcaln2ni2wo9lnlaprnd AT hadermannj interplayofstructuralchemistryandmagnetisminperovskitesastudyofcaln2ni2wo9lnlaprnd AT battlep interplayofstructuralchemistryandmagnetisminperovskitesastudyofcaln2ni2wo9lnlaprnd |