scholarly journals Photo-induced Antiferromagnetic-ferromagnetic and Spin-state Transition in GdBaCo2O5.5 Thin Film

2021 ◽  
Author(s):  
Yujun Zhang ◽  
Tsukasa Katayama ◽  
Akira Chikamatsu ◽  
Christian Schuessler-Langeheine ◽  
Niko Pontius ◽  
...  
Keyword(s):  
Thin Film ◽  
Spin State ◽  
Degrees Of Freedom ◽  
State Transition ◽  
Magnetic Circular Dichroism ◽  
Oxide System ◽  
Time Resolved ◽  
Dynamic Behaviors ◽  
X Ray ◽  
Spin State Transition

Abstract Investigation of ultrafast dynamic behaviors can provide novel insights about the coupling mechanisms among multiple degrees of freedom, such as lattice, magnetism and electronic structure, in condensed matters. Here we investigate both the ferromagnetic (FM) and antiferromagnetic (AFM) ultrafast dynamics of a strongly correlated oxide system, GdBaCo2O5.5 thin film by time-resolved x-ray magnetic circular dichroism in reflectivity (XMCDR) and resonant magnetic x-ray diffraction (RMXD). A photo-induced AFM-FM transition characterized by an increase of the transient XMCDR (sensitive to FM order) beyond the unpumped value and a decay of RMXD (sensitive to AFM order) was observed. The photon-energy dependence of the transient XMCDR and reflectivity could be interpreted as a concomitant photo-induced spin-state transition (SST). The AFM-FM transition and SST couple with each other in the time domain, resulting in unusual dynamic behaviors of the magnetism.

scholarly journals Low-temperature spin-state transition inLaCoO3investigated using resonant x-ray absorption at the CoKedge

2006 ◽  
Vol 73 (5) ◽  
Author(s):  
M. Medarde ◽  
C. Dallera ◽  
M. Grioni ◽  
J. Voigt ◽  
A. Podlesnyak ◽  
...  
Keyword(s):  
Low Temperature ◽  
Spin State ◽  
State Transition ◽  
X Ray ◽  
Spin State Transition ◽  
X Ray Absorption

scholarly journals Spin-state transition in Pr0.5Ca0.5CoO3analyzed by x-ray absorption and emission spectroscopies

2012 ◽  
Vol 86 (12) ◽  
Author(s):  
J. Herrero-Martín ◽  
J. L. García-Muñoz ◽  
K. Kvashnina ◽  
E. Gallo ◽  
G. Subías ◽  
...  
Keyword(s):  
Spin State ◽  
State Transition ◽  
Absorption And Emission ◽  
X Ray ◽  
Spin State Transition ◽  
X Ray Absorption

scholarly journals CoK-edge magnetic circular dichroism across the spin state transition in LaCoO3single crystal

2016 ◽  
Vol 712 ◽  
pp. 012111 ◽  
Author(s):  
V Efimov ◽  
A Ignatov ◽  
I O Troyanchuk ◽  
V V Sikolenko ◽  
A. Rogalev ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Spin State ◽  
State Transition ◽  
Magnetic Circular Dichroism ◽  
Spin State Transition ◽  
Circular Dichroïsm

Direct Evidence of the Symmetry Change of Co-3d Orbitals Associated with the Spin-State Transition in LaCoO3 by X-ray Compton Scattering

2015 ◽  
Vol 84 (11) ◽  
pp. 114706 ◽  
Author(s):  
Yoshihiko Kobayashi ◽  
Yoshiharu Sakurai ◽  
Masayoshi Itou ◽  
Keisuke Sato ◽  
Kichizo Asai
Keyword(s):  
Compton Scattering ◽  
Spin State ◽  
Direct Evidence ◽  
State Transition ◽  
X Ray ◽  
Spin State Transition ◽  
Symmetry Change

A combined diffraction and EXAFS study of LaCoO3 and La0.5Sr0.5Co0.75Nb0.25O3 powders

2017 ◽  
Vol 32 (S1) ◽  
pp. S52-S55
Author(s):  
E. A. Efimova ◽  
V. V. Sikolenko ◽  
D. V. Karpinsky ◽  
I. O. Troyanchuk ◽  
S. Pascarelli ◽  
...  
Keyword(s):  
Spin State ◽  
State Transition ◽  
X Ray Diffraction ◽  
Absorption Data ◽  
X Ray ◽  
Bond Lengths ◽  
Structural Distortions ◽  
Spin State Transition ◽  
Local Range ◽  
X Ray Absorption

A combination of neutron diffraction, synchrotron X-ray diffraction, and high-resolution extended X-ray absorption fine structure measurements has been used to clarify the correlations between long- and local-range structural distortions across the spin-state transition in powders of LaCoO3 and La0.5Sr0.5Co0.75Nb0.25O3. The analysis of the diffraction data has revealed that the isotropic thermal parameters of Co–O bond abnormally increase below 100 K in both samples, while the temperature dependence of the average Co–O bond lengths is linear from 10 to 300 K. We also have found that the Co–O bond lengths are larger in La0.5Sr0.5Co0.75Nb0.25O3, as compared with the ones in LaCoO3. The X-ray absorption data showed an anomalous decrease of the Co–O bond lengths only for LaCoO3, in contrast to the bond length values obtained by diffraction. The structural anomalies observed by spectroscopy measurements are discussed in terms of the spin-state transition model.

Spin State Transition Studied by Means of Optical Microscope

2010 ◽  
Vol 163 ◽  
pp. 46-50 ◽  
Author(s):  
Maciej Zubko ◽  
Paweł Zajdel ◽  
Joachim Kusz
Keyword(s):  
Spin State ◽  
Spin Crossover ◽  
State Transition ◽  
Optical Microscope ◽  
X Ray ◽  
Spin State Transition ◽  
Transmission Geometry ◽  
One Step ◽  
Analysis Of Change

We have tested a new method which allows assigning the spin state of the spin crossover (SCO) crystal in-situ during the diffraction experiment. The method is based on the analysis of change of the colour of the SCO compounds. We have found that the off-line setup in transmission geometry is reliable in assigning the magnitude of high spin molecules fraction (γHS) and the character (one step, many steps, histeresis) of the SCO transition. Later on, this method has been used in the in-situ measurements directly on X-ray four-circle diffractometer.

scholarly journals EXAFS and X-ray diffraction study of LaCoO3across the spin-state transition

2016 ◽  
Vol 712 ◽  
pp. 012118 ◽  
Author(s):  
V V Sikolenko ◽  
I O Troyanchuk ◽  
V V Efimov ◽  
E A Efimova ◽  
S I Tiutiunnikov ◽  
...  
Keyword(s):  
Diffraction Study ◽  
Spin State ◽  
State Transition ◽  
X Ray Diffraction ◽  
X Ray ◽  
Spin State Transition
Sign in / Sign up

Export Citation Format

Share Document