Magnetic fluctuations and spin freezing in nonsuperconducting LiFeAs derivatives
We present detailed magnetometry and muon-spin rotation data on polycrystalline samples of overdoped, nonsuperconducting LiFe1 -xNixAs (x=0.1,0.2) and Li1-yFe1+yAs (0≤y≤0.04) as well as superconducting LiFeAs. While LiFe1 -xNixAs exhibits weak antiferromagnetic fluctuations down to 1.5K, Li1-yFe1+yA...
| Hoofdauteurs: | , , , , , , , |
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| Formaat: | Journal article |
| Taal: | English |
| Gepubliceerd in: |
2013
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| _version_ | 1826282986838949888 |
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| author | Wright, J Pitcher, M Trevelyan-Thomas, W Lancaster, T Baker, P Pratt, F Clarke, S Blundell, S |
| author_facet | Wright, J Pitcher, M Trevelyan-Thomas, W Lancaster, T Baker, P Pratt, F Clarke, S Blundell, S |
| author_sort | Wright, J |
| collection | OXFORD |
| description | We present detailed magnetometry and muon-spin rotation data on polycrystalline samples of overdoped, nonsuperconducting LiFe1 -xNixAs (x=0.1,0.2) and Li1-yFe1+yAs (0≤y≤0.04) as well as superconducting LiFeAs. While LiFe1 -xNixAs exhibits weak antiferromagnetic fluctuations down to 1.5K, Li1-yFe1+yAs samples, which have a much smaller deviation from the 1:1:1 stoichiometry, show a crossover from ferromagnetic to antiferromagnetic fluctuations on cooling and a freezing of dynamically fluctuating moments at low temperatures. We do not find any signatures of time-reversal symmetry breaking in stoichiometric LiFeAs that would support recent predictions of triplet pairing. © 2013 American Physical Society. |
| first_indexed | 2024-03-07T00:52:07Z |
| format | Journal article |
| id | oxford-uuid:86bee1b4-7bc3-445b-bbd6-021c27fd48c3 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:52:07Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | oxford-uuid:86bee1b4-7bc3-445b-bbd6-021c27fd48c32022-03-26T22:06:07ZMagnetic fluctuations and spin freezing in nonsuperconducting LiFeAs derivativesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:86bee1b4-7bc3-445b-bbd6-021c27fd48c3EnglishSymplectic Elements at Oxford2013Wright, JPitcher, MTrevelyan-Thomas, WLancaster, TBaker, PPratt, FClarke, SBlundell, SWe present detailed magnetometry and muon-spin rotation data on polycrystalline samples of overdoped, nonsuperconducting LiFe1 -xNixAs (x=0.1,0.2) and Li1-yFe1+yAs (0≤y≤0.04) as well as superconducting LiFeAs. While LiFe1 -xNixAs exhibits weak antiferromagnetic fluctuations down to 1.5K, Li1-yFe1+yAs samples, which have a much smaller deviation from the 1:1:1 stoichiometry, show a crossover from ferromagnetic to antiferromagnetic fluctuations on cooling and a freezing of dynamically fluctuating moments at low temperatures. We do not find any signatures of time-reversal symmetry breaking in stoichiometric LiFeAs that would support recent predictions of triplet pairing. © 2013 American Physical Society. |
| spellingShingle | Wright, J Pitcher, M Trevelyan-Thomas, W Lancaster, T Baker, P Pratt, F Clarke, S Blundell, S Magnetic fluctuations and spin freezing in nonsuperconducting LiFeAs derivatives |
| title | Magnetic fluctuations and spin freezing in nonsuperconducting LiFeAs derivatives |
| title_full | Magnetic fluctuations and spin freezing in nonsuperconducting LiFeAs derivatives |
| title_fullStr | Magnetic fluctuations and spin freezing in nonsuperconducting LiFeAs derivatives |
| title_full_unstemmed | Magnetic fluctuations and spin freezing in nonsuperconducting LiFeAs derivatives |
| title_short | Magnetic fluctuations and spin freezing in nonsuperconducting LiFeAs derivatives |
| title_sort | magnetic fluctuations and spin freezing in nonsuperconducting lifeas derivatives |
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