Charge ordering and structural distortions at low temperature in La2-2xSr1+2xMn2O7 (x=0.475 and 0.5)
In this paper we present x-ray scattering results of charge and orbital ordering in the bilayer manganite La2-2xSr1+2xMn2O7 with doping levels x = 0.5 and x = 0.475. Using high-energy x-ray scattering, the structural modulation due to the Jahn-Teller ordering and the charge ordering due to the Mn3+/...
| Main Authors: | , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2003
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| _version_ | 1826281689005948928 |
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| author | Wilkins, S Spencer, P Beale, T Hatton, P von Zimmermann, M Brown, S Prabhakaran, D Boothroyd, A |
| author_facet | Wilkins, S Spencer, P Beale, T Hatton, P von Zimmermann, M Brown, S Prabhakaran, D Boothroyd, A |
| author_sort | Wilkins, S |
| collection | OXFORD |
| description | In this paper we present x-ray scattering results of charge and orbital ordering in the bilayer manganite La2-2xSr1+2xMn2O7 with doping levels x = 0.5 and x = 0.475. Using high-energy x-ray scattering, the structural modulation due to the Jahn-Teller ordering and the charge ordering due to the Mn3+/Mn4+ pattern have been measured. Both the x = 0.5 and x = 0.475 samples are found to display charge and Jahn-Teller order. We have confirmed that the wave vectors of the Jahn-Teiler order, charge order, and orbital order are Q→ = (0.25,0.25,0), Q→ = (0.5,0.5,0) and Q→ = (0.25,0.25,0). The origin of these has been confirmed by resonant x-ray scattering in the vicinity of the Mn K edge using polarization analysis. Contrary to previous studies, the Jahn-Teller order is found to be not reentrant, but is found to reduce in intensity at temperatures below 140 K for both samples. Charge ordering was also detected in the x = 0.5 sample below this temperature. |
| first_indexed | 2024-03-07T00:32:34Z |
| format | Journal article |
| id | oxford-uuid:805440bf-52b3-41c4-a6ae-70712e8ada0a |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:32:34Z |
| publishDate | 2003 |
| record_format | dspace |
| spelling | oxford-uuid:805440bf-52b3-41c4-a6ae-70712e8ada0a2022-03-26T21:22:30ZCharge ordering and structural distortions at low temperature in La2-2xSr1+2xMn2O7 (x=0.475 and 0.5)Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:805440bf-52b3-41c4-a6ae-70712e8ada0aEnglishSymplectic Elements at Oxford2003Wilkins, SSpencer, PBeale, THatton, Pvon Zimmermann, MBrown, SPrabhakaran, DBoothroyd, AIn this paper we present x-ray scattering results of charge and orbital ordering in the bilayer manganite La2-2xSr1+2xMn2O7 with doping levels x = 0.5 and x = 0.475. Using high-energy x-ray scattering, the structural modulation due to the Jahn-Teller ordering and the charge ordering due to the Mn3+/Mn4+ pattern have been measured. Both the x = 0.5 and x = 0.475 samples are found to display charge and Jahn-Teller order. We have confirmed that the wave vectors of the Jahn-Teiler order, charge order, and orbital order are Q→ = (0.25,0.25,0), Q→ = (0.5,0.5,0) and Q→ = (0.25,0.25,0). The origin of these has been confirmed by resonant x-ray scattering in the vicinity of the Mn K edge using polarization analysis. Contrary to previous studies, the Jahn-Teller order is found to be not reentrant, but is found to reduce in intensity at temperatures below 140 K for both samples. Charge ordering was also detected in the x = 0.5 sample below this temperature. |
| spellingShingle | Wilkins, S Spencer, P Beale, T Hatton, P von Zimmermann, M Brown, S Prabhakaran, D Boothroyd, A Charge ordering and structural distortions at low temperature in La2-2xSr1+2xMn2O7 (x=0.475 and 0.5) |
| title | Charge ordering and structural distortions at low temperature in La2-2xSr1+2xMn2O7 (x=0.475 and 0.5) |
| title_full | Charge ordering and structural distortions at low temperature in La2-2xSr1+2xMn2O7 (x=0.475 and 0.5) |
| title_fullStr | Charge ordering and structural distortions at low temperature in La2-2xSr1+2xMn2O7 (x=0.475 and 0.5) |
| title_full_unstemmed | Charge ordering and structural distortions at low temperature in La2-2xSr1+2xMn2O7 (x=0.475 and 0.5) |
| title_short | Charge ordering and structural distortions at low temperature in La2-2xSr1+2xMn2O7 (x=0.475 and 0.5) |
| title_sort | charge ordering and structural distortions at low temperature in la2 2xsr1 2xmn2o7 x 0 475 and 0 5 |
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