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

被引：86

作者：

Ehrke, H. ^{[1
,2
]}

Tobey, R. I. ^{[1
,3
]}

Wall, S. ^{[1
,4
]}

Cavill, S. A. ^{[2
]}

Foerst, M. ^{[3
]}

Khanna, V. ^{[3
]}

Garl, Th ^{[3
]}

Stojanovic, N. ^{[5
]}

Prabhakaran, D. ^{[1
]}

Boothroyd, A. T. ^{[1
]}

Gensch, M. ^{[6
]}

Mirone, A. ^{[7
]}

Reutler, P. ^{[8
]}

Revcolevschi, A. ^{[8
]}

Dhesi, S. S. ^{[2
]}

Cavalleri, A. ^{[1
,3
]}

机构：

[1] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

[2] Diamond Light Source, Didcot OX11 0QX, Oxon, England

[3] Univ Hamburg CFEL, Max Planck Res Dept Struct Dynam, Hamburg, Germany

[4] Fritz Haber Inst, Dept Phys Chem, D-14195 Berlin, Germany

[5] DESY, HASYLAB, D-22607 Hamburg, Germany

[6] Helmholtz Zentrum Dresden Rossendorf, D-01328 Dresden, Germany

[7] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[8] Ctr Univ Paris Sud, Lab Phys Chim Etat Solide, F-91405 Orsay, France

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 21期

基金：

英国工程与自然科学研究理事会;

关键词：

MAGNETIC-FIELD; PHASE; MAGNETORESISTANCE; MANGANITES; TRANSITION; DYNAMICS; CHARGE;

D O I：

10.1103/PhysRevLett.106.217401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：4

共 31 条

[1] A STRUCTURAL PHASE-TRANSITION INDUCED BY AN EXTERNAL MAGNETIC-FIELD [J].

ASAMITSU, A ;

MORITOMO, Y ;

TOMIOKA, Y ;

ARIMA, T ;

TOKURA, Y .

NATURE, 1995, 373 (6513) :407-409

[2] Current switching of resistive states in magnetoresistive manganites [J].

Asamitsu, A ;

Tomioka, Y ;

Kuwahara, H ;

Tokura, Y .

NATURE, 1997, 388 (6637) :50-52

[3] Ultrafast Structural Phase Transition Driven by Photoinduced Melting of Charge and Orbital Order [J].

Beaud, P. ;

Johnson, S. L. ;

Vorobeva, E. ;

Staub, U. ;

De Souza, R. A. ;

Milne, C. J. ;

Jia, Q. X. ;

Ingold, G. .

PHYSICAL REVIEW LETTERS, 2009, 103 (15)

[4] Distinguishing the ultrafast dynamics of spin and orbital moments in solids [J].

Boeglin, C. ;

Beaurepaire, E. ;

Halte, V. ;

Lopez-Flores, V. ;

Stamm, C. ;

Pontius, N. ;

Duerr, H. A. ;

Bigot, J. -Y. .

NATURE, 2010, 465 (7297) :458-U78

[5] Orbital ordering in the manganites:: Resonant x-ray scattering predictions at the manganese LII and LIII edges [J].

Castleton, CWM ;

Altarelli, M .

PHYSICAL REVIEW B, 2000, 62 (02) :1033-1038

[6] Zener polaron ordering in half-doped manganites -: art. no. 097205 [J].

Daoud-Aladine, A ;

Rodríguez-Carvajal, J ;

Pinsard-Gaudart, L ;

Fernández-Díaz, MT ;

Revcolevschi, A .

PHYSICAL REVIEW LETTERS, 2002, 89 (09) :972051-972054

[7] Unraveling orbital ordering in La0.5Sr1.5MnO4 -: art. no. 056403 [J].

Dhesi, SS ;

Mirone, A ;

De Nadaï, C ;

Ohresser, P ;

Bencok, P ;

Brookes, NB ;

Reutler, P ;

Revcolevschi, A ;

Tagliaferri, A ;

Toulemonde, O ;

van der Laan, G .

PHYSICAL REVIEW LETTERS, 2004, 92 (05) :4

[8] Visualization of the local insulator-metal transition in Pr0.7Ca0.3MnO3 [J].

Fiebig, M ;

Miyano, K ;

Tomioka, Y ;

Tokura, Y .

SCIENCE, 1998, 280 (5371) :1925-1928

[9] Resonant soft x-ray powder diffraction study to determine the orbital ordering in A-site-ordered SmBaMn2O6 [J].

Garcia-Fernandez, M. ;

Staub, U. ;

Bodenthin, Y. ;

Lawrence, S. M. ;

Mulders, A. M. ;

Buckley, C. E. ;

Weyeneth, S. ;

Pomjakushina, E. ;

Conder, K. .

PHYSICAL REVIEW B, 2008, 77 (06)

[10] THEORY OF THE ROLE OF COVALENCE IN THE PEROVSKITE-TYPE MANGANITES [LA,M(II)]MNO3 [J].

GOODENOUGH, JB .

PHYSICAL REVIEW, 1955, 100 (02) :564-573

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