Competing strain relaxation mechanisms in epitaxially grown Pr0.48Ca0.52MnO3 on SrTiO3
We investigated the impact of strain relaxation on the current transport of Pr0.48Ca0.52MnO3 (PCMO) thin films grown epitaxially on SrTiO3 single crystals by pulsed laser deposition. The incorporation of misfit dislocations and the formation of cracks are identified as competing mechanisms for the r...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2014-10-01
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| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/1.4900817 |
| _version_ | 1828419246357479424 |
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| author | Anja Herpers Kerry J. O’Shea Donald A. MacLaren Michael Noyong Bernd Rösgen Ulrich Simon Regina Dittmann |
| author_facet | Anja Herpers Kerry J. O’Shea Donald A. MacLaren Michael Noyong Bernd Rösgen Ulrich Simon Regina Dittmann |
| author_sort | Anja Herpers |
| collection | DOAJ |
| description | We investigated the impact of strain relaxation on the current transport of Pr0.48Ca0.52MnO3 (PCMO) thin films grown epitaxially on SrTiO3 single crystals by pulsed laser deposition. The incorporation of misfit dislocations and the formation of cracks are identified as competing mechanisms for the relaxation of the biaxial tensile strain. Crack formation leads to a higher crystal quality within the domains but the cracks disable the macroscopic charge transport through the PCMO layer. Progressive strain relaxation by the incorporation of misfit dislocations, on the other hand, results in a significant decrease of the activation energy for polaron hopping with increasing film thickness. |
| first_indexed | 2024-12-10T14:49:28Z |
| format | Article |
| id | doaj.art-a9519291998449e091b3991aa42e82ef |
| institution | Directory Open Access Journal |
| issn | 2166-532X |
| language | English |
| last_indexed | 2024-12-10T14:49:28Z |
| publishDate | 2014-10-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj.art-a9519291998449e091b3991aa42e82ef2022-12-22T01:44:28ZengAIP Publishing LLCAPL Materials2166-532X2014-10-01210106106106106-810.1063/1.4900817003411APMCompeting strain relaxation mechanisms in epitaxially grown Pr0.48Ca0.52MnO3 on SrTiO3Anja Herpers0Kerry J. O’Shea1Donald A. MacLaren2Michael Noyong3Bernd Rösgen4Ulrich Simon5Regina Dittmann6Research Center Jülich, Peter Grünberg Institut, Electronic Materials (PGI-7), 52425 Jülich, GermanySUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United KingdomSUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United KingdomInstitute of Inorganic Chemistry (IAC), RWTH Aachen University, Landoltweg 1, 52074 Aachen, GermanyResearch Center Jülich, Peter Grünberg Institut, Electronic Materials (PGI-7), 52425 Jülich, GermanyInstitute of Inorganic Chemistry (IAC), RWTH Aachen University, Landoltweg 1, 52074 Aachen, GermanyResearch Center Jülich, Peter Grünberg Institut, Electronic Materials (PGI-7), 52425 Jülich, GermanyWe investigated the impact of strain relaxation on the current transport of Pr0.48Ca0.52MnO3 (PCMO) thin films grown epitaxially on SrTiO3 single crystals by pulsed laser deposition. The incorporation of misfit dislocations and the formation of cracks are identified as competing mechanisms for the relaxation of the biaxial tensile strain. Crack formation leads to a higher crystal quality within the domains but the cracks disable the macroscopic charge transport through the PCMO layer. Progressive strain relaxation by the incorporation of misfit dislocations, on the other hand, results in a significant decrease of the activation energy for polaron hopping with increasing film thickness.http://dx.doi.org/10.1063/1.4900817 |
| spellingShingle | Anja Herpers Kerry J. O’Shea Donald A. MacLaren Michael Noyong Bernd Rösgen Ulrich Simon Regina Dittmann Competing strain relaxation mechanisms in epitaxially grown Pr0.48Ca0.52MnO3 on SrTiO3 APL Materials |
| title | Competing strain relaxation mechanisms in epitaxially grown Pr0.48Ca0.52MnO3 on SrTiO3 |
| title_full | Competing strain relaxation mechanisms in epitaxially grown Pr0.48Ca0.52MnO3 on SrTiO3 |
| title_fullStr | Competing strain relaxation mechanisms in epitaxially grown Pr0.48Ca0.52MnO3 on SrTiO3 |
| title_full_unstemmed | Competing strain relaxation mechanisms in epitaxially grown Pr0.48Ca0.52MnO3 on SrTiO3 |
| title_short | Competing strain relaxation mechanisms in epitaxially grown Pr0.48Ca0.52MnO3 on SrTiO3 |
| title_sort | competing strain relaxation mechanisms in epitaxially grown pr0 48ca0 52mno3 on srtio3 |
| url | http://dx.doi.org/10.1063/1.4900817 |
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