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  Photoinduced Melting of Antiferromagnetic Order in La0.5Sr1.5MnO4 Measured Using Ultrafast Resonant Soft X-Ray Diffraction

Ehrke, H., Tobey, R., Wall, S., Cavill, S., Först, M., Khanna, V., et al. (2011). Photoinduced Melting of Antiferromagnetic Order in La0.5Sr1.5MnO4 Measured Using Ultrafast Resonant Soft X-Ray Diffraction. Physical Review Letters, 106(21): 217401. doi:10.1103/PhysRevLett.106.217401.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-19AD-5 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-2EF3-7
Genre: Journal Article

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PhysRevLett.106.217401.pdf (Publisher version), 555KB
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2011
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© American Physical Society
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http://arxiv.org/abs/1012.4960 (Preprint)
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 Creators:
Ehrke, H.1, 2, Author
Tobey, Ra'anan1, 3, 4, Author              
Wall, Simon1, 5, Author              
Cavill, S.A.2, Author
Först, Michael3, 4, Author              
Khanna, Vikaran3, 4, Author              
Garl, Thomas3, 4, Author              
Stojanovic, N.6, Author
Prabhakaran, D.1, Author
Boothroyd, A. T.1, Author
Gensch, M.7, Author
Mirone, A.8, Author
Reutler, P.9, Author
Revcolevschi, A.9, Author
Dhesi, S. S.2, Author
Cavalleri, Andrea1, 3, 4, Author              
Affiliations:
1Department of Physics, Clarendon Laboratory, University of Oxford, Oxford, United Kingdom, ou_persistent22              
2Diamond Light Source, Chilton, Didcot, OX11 0QX, United Kingdom, ou_persistent22              
3Condensed Matter Dynamics Division, Max Planck Research Department for Structural Dynamics, Department of Physics, University of Hamburg, External Organizations, ou_2173637              
4CFEL, Hamburg, Germany, ou_persistent22              
5Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              
6HASYLAB at DESY, Notkestrasse 85, 22607 Hamburg, Germany, ou_persistent22              
7Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany, ou_persistent22              
8European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble, France, ou_persistent22              
9Laboratoire de Physico-Chimie de l’Etat Solide, Centre Université Paris Sud, F-91405 Orsay Cedex, France, ou_persistent22              

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Free keywords: PACS numbers: 78.70.Ck, 71.27.+a, 75.25.-j, 78.47.J-
 Abstract: We used ultrafast resonant soft x-ray diffraction to probe the picosecond dynamics of spin and orbital order in La0.5Sr1.5MnO4 after photoexcitation with a femtosecond pulse of 1.5 eV radiation. Complete melting of antiferromagnetic spin order is evidenced by the disappearance of a (1/4,1/4,1/2) diffraction peak. On the other hand, the (1/4,1/4,0) diffraction peak, reflecting orbital order, is only partially reduced. We interpret the results as evidence of destabilization in the short-range exchange pattern with no significant relaxation of the long-range Jahn-Teller distortions. Cluster calculations are used to analyze different possible magnetically ordered states in the long-lived metastable phase. Nonthermal coupling between light and magnetism emerges as a primary aspect of photoinduced phase transitions in manganites.

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Language(s): eng - English
 Dates: 2011-01-112011-05-252011-05-27
 Publication Status: Published in print
 Pages: 4
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevLett.106.217401
arXiv: 1012.4960
 Degree: -

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Title: Physical Review Letters
  Other : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y., etc. : American Physical Society.
Pages: - Volume / Issue: 106 (21) Sequence Number: 217401 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: /journals/resource/954925433406