Incommensurate charge stripe ordering in La2-xSrxNiO4 for x=(0.33,0.30,0.275)
In this paper we report studies of the charge stripe ordering using high resolution x-ray scattering in the nickelate system La2-xSr xNiO4 with doping levels of x=0.33, x=0.30, and x=0.275. The charge stripes for all doping levels were found to be two dimensional in nature with a high degree of corr...
| Main Authors: | , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2004
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| _version_ | 1797078886512590848 |
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| author | Ghazi, M Spencer, P Wilkins, S Hatton, P Mannix, D Prabhakaran, D Boothroyd, A Cheong, S |
| author_facet | Ghazi, M Spencer, P Wilkins, S Hatton, P Mannix, D Prabhakaran, D Boothroyd, A Cheong, S |
| author_sort | Ghazi, M |
| collection | OXFORD |
| description | In this paper we report studies of the charge stripe ordering using high resolution x-ray scattering in the nickelate system La2-xSr xNiO4 with doping levels of x=0.33, x=0.30, and x=0.275. The charge stripes for all doping levels were found to be two dimensional in nature with a high degree of correlation in the a-b plane. The in-plane inverse correlation length in the lower doped systems was greater than that in the x=0.33 system and is greatest for x=0.275, consistent with the stripes becoming less correlated as the doping level is decreased from x=0.33. However, the charge ordering in the x=0.33 system was observed to be more two dimensional in nature with a greater inverse correlation length between planes. The interaction between the lattice and charge order was observed to stabilize the charge ordering, even in the absence of spin ordering. In the x=0.30 and x=0.275 systems no long-range charge order could exist without the presence of the magnetic order. In both systems the charge stripes were incommensurate and on heating the incommensurability increased towards the stable ε=0.33 value as the stripes gained thermal energy to overcome the Coulombic repulsion. In all these systems the integrated intensity of the stripe reflections showed a clear difference in behavior from previous neutron studies with an initial increase in the integrated intensity as the temperature was increased, which was not found in the neutron studies. |
| first_indexed | 2024-03-07T00:37:57Z |
| format | Journal article |
| id | oxford-uuid:820e8783-2592-43b8-9cd9-2149a8643e87 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:37:57Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | oxford-uuid:820e8783-2592-43b8-9cd9-2149a8643e872022-03-26T21:34:42ZIncommensurate charge stripe ordering in La2-xSrxNiO4 for x=(0.33,0.30,0.275)Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:820e8783-2592-43b8-9cd9-2149a8643e87EnglishSymplectic Elements at Oxford2004Ghazi, MSpencer, PWilkins, SHatton, PMannix, DPrabhakaran, DBoothroyd, ACheong, SIn this paper we report studies of the charge stripe ordering using high resolution x-ray scattering in the nickelate system La2-xSr xNiO4 with doping levels of x=0.33, x=0.30, and x=0.275. The charge stripes for all doping levels were found to be two dimensional in nature with a high degree of correlation in the a-b plane. The in-plane inverse correlation length in the lower doped systems was greater than that in the x=0.33 system and is greatest for x=0.275, consistent with the stripes becoming less correlated as the doping level is decreased from x=0.33. However, the charge ordering in the x=0.33 system was observed to be more two dimensional in nature with a greater inverse correlation length between planes. The interaction between the lattice and charge order was observed to stabilize the charge ordering, even in the absence of spin ordering. In the x=0.30 and x=0.275 systems no long-range charge order could exist without the presence of the magnetic order. In both systems the charge stripes were incommensurate and on heating the incommensurability increased towards the stable ε=0.33 value as the stripes gained thermal energy to overcome the Coulombic repulsion. In all these systems the integrated intensity of the stripe reflections showed a clear difference in behavior from previous neutron studies with an initial increase in the integrated intensity as the temperature was increased, which was not found in the neutron studies. |
| spellingShingle | Ghazi, M Spencer, P Wilkins, S Hatton, P Mannix, D Prabhakaran, D Boothroyd, A Cheong, S Incommensurate charge stripe ordering in La2-xSrxNiO4 for x=(0.33,0.30,0.275) |
| title | Incommensurate charge stripe ordering in La2-xSrxNiO4 for x=(0.33,0.30,0.275) |
| title_full | Incommensurate charge stripe ordering in La2-xSrxNiO4 for x=(0.33,0.30,0.275) |
| title_fullStr | Incommensurate charge stripe ordering in La2-xSrxNiO4 for x=(0.33,0.30,0.275) |
| title_full_unstemmed | Incommensurate charge stripe ordering in La2-xSrxNiO4 for x=(0.33,0.30,0.275) |
| title_short | Incommensurate charge stripe ordering in La2-xSrxNiO4 for x=(0.33,0.30,0.275) |
| title_sort | incommensurate charge stripe ordering in la2 xsrxnio4 for x 0 33 0 30 0 275 |
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