Direct evidence of phase segregation and magnetic-field-induced structural transition inNd0.5Sr0.5MnO3by neutron diffraction

2000 ◽  
Vol 61 (14) ◽  
pp. R9229-R9232 ◽  
Author(s):  
C. Ritter ◽  
R. Mahendiran ◽  
M. R. Ibarra ◽  
L. Morellon ◽  
A. Maignan ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Neutron Diffraction ◽  
Structural Transition ◽  
Direct Evidence ◽  
Phase Segregation

scholarly journals Direct Evidence for the Effect of Glycerol on Protein Hydration and Thermal Structural Transition

2018 ◽  
Vol 115 (2) ◽  
pp. 313-327 ◽  
Author(s):  
Mitsuhiro Hirai ◽  
Satoshi Ajito ◽  
Masaaki Sugiyama ◽  
Hiroki Iwase ◽  
Shin-ichi Takata ◽  
...  
Keyword(s):  
Structural Transition ◽  
Direct Evidence ◽  
Protein Hydration

Side Chain Influence on Main Chain Orientation of PPV-Type Oligomers

1999 ◽  
Vol 598 ◽  
Author(s):  
Ruth Müllner ◽  
Laurence Noirez ◽  
Egbert Zojer ◽  
Franz Stelzer ◽  
Günther Leising
Keyword(s):  
Magnetic Field ◽  
Neutron Diffraction ◽  
Main Chain ◽  
Side Chain ◽  
Phenylene Vinylene ◽  
Spectroscopic Methods ◽  
Polarized Optical Microscopy ◽  
Chain Orientation ◽  
H Nmr ◽  
Ft Ir

ABSTRACTOligo (p-phenylene vinylene)s OPV were synthesized having cyanobiphenyloxy-groups bonded to the vinylene double bonds via alkylene spacers. A Pd(0)-reaction was used to synthesize the oligomers starting with the dibromo-substituted benzene and the alkenyloxy-biphenyl-nitrile. The orientation of the mesogens by a magnetic field and their influence on the orientation of the main chain was investigated by means of neutron diffraction ND. Data on the photophysics of the oligomers were gained using several spectroscopic methods such as UV/VIS, polarized optical microscopy POM, SEC, 1H-NMR, FT-IR.

Mode-locking and dynamic melting of vortex matter driven through mesoscopic channels

2002 ◽  
Vol 12 (9) ◽  
pp. 169-171
Author(s):  
R. Besseling ◽  
N. Kokubo ◽  
P. H. Kes
Keyword(s):  
Magnetic Field ◽  
Direct Evidence ◽  
Mode Locking ◽  
Row Spacing ◽  
Vortex Matter ◽  
Interference Phenomenon ◽  
Dynamic Phase ◽  
Dynamic Phase Transition ◽  
Dynamic Melting ◽  
Minimum Velocity

We investigated the dynamics of vortex matter confined to mesoscopic channels by means of mode locking experiments. When vortices move coherently through the pinning (shear) potential provided by static vortices in the channel edges, interference between the washboard frequency of the lattice and the frequency of superimposed rf-currents causes (Shapiro-like) steps in the dc-IV curves. These steps allow to trace directly how the number of moving rows in each channel and the frustration between row spacing and channel width, varies with magnetic field. The flow stress (~ I,) surprisingly exhibits maxima for mismatching (defective) structures, originating from traftic-jam-like flow due to disorder in the edges. We then focus on the behavior for higher fields, approaching the 2D melting field Bm. In this regime the presence of the interference phenomenon, characteristic for crystalline motion, strongly depends on the velocity (applied frequency) at which vortices are probed. The minimum velocity to observe coherent, solid-like motion is found to diverge when the field is increased towards $E_{''}$ above which the interference is absent for any frequency. This provides the first direct evidence for a velocity dependent, dynamic phase transition of vortex matter moving through disorder, as predicted by Koshelev and Vinokur.

Neutron diffraction study of magnetic field induced behavior in the heavy Fermion Ce3Co4Sn13

2008 ◽  
Vol 403 (5-9) ◽  
pp. 909-910 ◽  
Author(s):  
A.D. Christianson ◽  
E.A. Goremychkin ◽  
J.S. Gardner ◽  
H.J. Kang ◽  
J.-H. Chung ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Neutron Diffraction ◽  
Diffraction Study ◽  
Heavy Fermion ◽  
Neutron Diffraction Study

Phase segregation in the hole-doped manganite Nd0.93MnO2.96: magnetic measurements and neutron diffraction

2004 ◽  
Vol 281 (2-3) ◽  
pp. 221-226 ◽  
Author(s):  
N. Ihzaz ◽  
H. Vincent ◽  
G. Dezanneau ◽  
H. Roussel ◽  
J. Dhahri ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Magnetic Measurements ◽  
Phase Segregation
Sign in / Sign up

Export Citation Format

Share Document