Publication
Article Metrics
Citations
Online attention
Photoinduced Melting of Antiferromagnetic Order in La_{0.5}Sr_{1.5}MnO_{4} Measured Using Ultrafast Resonant Soft X-Ray Diffraction
DOI:
10.1103/PhysRevLett.106.217401
PMID:
21699341
Authors:
H.
Ehrke
(Department of Physics, Clarendon Laboratory, University of Oxford)
,
R.
Tobey
(Department of Physics, Clarendon Laboratory, University of Oxford)
,
S.
Wall
(University of Oxford)
,
S.
Cavill
(University of York, Diamond Light Source)
,
M.
Foerst
(Max-Planck Department for Structural Dynamics, Center for Free Electron Laser Science, University of Hamburg)
,
V.
Khanna
(Max Planck Research Department for Structural Dynamics, University of Hamburg-CFEL)
,
T.
Garl
(Max Planck Research Department for Structural Dynamics, University of Hamburg-CFEL)
,
N.
Stojanovic
(HASYLAB at DESY)
,
D.
Prabhakaran
(Department of Physics, Clarendon Laboratory, University of Oxford)
,
A.
Boothroyd
(University of Oxford)
,
M.
Gensch
(Helmholtzzentrum Berlin)
,
A.
Mirone
(European Synchrotron Radiation Facility)
,
P.
Reutler
(Laboratoire de Physico-Chimie de lEtat Solide, Centre Université Paris Sud)
,
A.
Revcolevschi
(Laboratoire de Physico-Chimie de lEtat Solide, Centre Université Paris Sud)
,
S.
Dhesi
(Diamond Light Source)
,
A.
Cavalleri
(University of Oxford)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Physical Review Letters
, VOL 106 (21)
, PAGES 217401
State:
Published (Approved)
Published:
May 2011
Abstract: We used ultrafast resonant soft x-ray diffraction to probe the picosecond dynamics of spin and orbital order in La 0.5 Sr 1.5 MnO 4 after photoexcitation with a femtosecond pulse of 1.5 eV radiation. Complete melting of antiferromagnetic spin order is evidenced by the disappearance of a (14 ,14 ,12 ) diffraction peak. On the other hand, the (14 ,14 ,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.
Journal Keywords: Ultrafast; Melting; Magnetic Order
Subject Areas:
Physics,
Materials,
Chemistry
Instruments:
I06-Nanoscience
Added On:
30/09/2011 00:03
Discipline Tags:
Technical Tags: