MAGNETIC BEHAVIOUR OF A Cr+1.6 at.% Si SINGLE CRYSTAL

1993 ◽  
Vol 07 (01n03) ◽  
pp. 630-633 ◽  
Author(s):  
J.A.J. LOURENS ◽  
H.L. ALBERTS
Keyword(s):  
Thermal Expansion ◽  
Single Crystal ◽  
Magnetic Behaviour ◽  
Itinerant Electron ◽  
Velocity Of Sound ◽  
Continuous Component ◽  
Continuous Transition ◽  
First Order ◽  
Theoretical Predictions ◽  
Order Discontinuity

Measurements of thermal expansion and velocity of sound around the Néel temperature (TN) of a Cr+1.6 at.% Si single crystal are presented. A weak continuous transition superimposed on a sharp first-order discontinuity was observed in the thermal expansion near TN. The continuous component is accurately described by a critical exponent power law. The sound velocity diverges sharply near TN in contrast with theoretical predictions for Cr-like itinerant electron antiferromagnets.

Thermal expansion of single-crystal Gd/sub 5/(Si/sub 1.95/Ge/sub 2.05/) showing unusual first-order transformation

2002 ◽  
Vol 38 (5) ◽  
pp. 3252-3254 ◽  
Author(s):  
M. Han ◽  
J.A. Paulsen ◽  
J.E. Snyder ◽  
D.C. Jiles ◽  
T.A. Lograsso ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Single Crystal ◽  
First Order

Two Consecutive Magneto-Structural Gas-Solid Transformations with Single-Crystal Retention in Non-Porous Molecular Materials

2018 ◽  
Author(s):  
Julia Miguel-Donet ◽  
Javier López-Cabrelles ◽  
Nestor Calvo Galve ◽  
Eugenio Coronado ◽  
Guillermo Minguez Espallargas
Keyword(s):  
Solid State ◽  
Single Crystal ◽  
Structural Rearrangement ◽  
Magnetic Behaviour ◽  
Porous Solids ◽  
Potential Applications ◽  
Hcl Gas ◽  
Porous Coordination Polymer ◽  
Gas Molecules ◽  
Magnetostructural Transformation

<p>Modification of the magnetic properties in a solid-state material upon external stimulus has attracted much attention in the recent years for their potential applications as switches and sensors. Within the field of coordination polymers, gas sorption studies typically focus on porous solids, with the gas molecules accommodating in the channels. Here we present a 1D non-porous coordination polymer capable of incorporating HCl gas molecules, which not only causes a reordering of its atoms in the solid state but also provokes dramatic changes in the magnetic behaviour. Subsequently, a further solid-gas transformation can occur with the extrusion of HCl gas molecules causing a second structural rearrangement which is also accompanied by modification in the magnetic path between the metal centres. Unequivocal evidence of the two-step magnetostructural transformation is provided by X-ray single-crystal diffraction.</p>

Stress and temperature-induced phase transitions and thermal expansion in (001)-cut PMN-31PT single crystal

2015 ◽  
Vol 652 ◽  
pp. 287-291 ◽  
Author(s):  
Xiaojuan Li ◽  
Zengzhe Xi ◽  
Peng Liu ◽  
Wei Long ◽  
Pinyang Fang
Keyword(s):  
Thermal Expansion ◽  
Phase Transitions ◽  
Single Crystal

Verification of first‐order magnetic phase transition in single crystal iron films

1982 ◽  
Vol 53 (11) ◽  
pp. 7966-7968 ◽  
Author(s):  
F. J. Rachford ◽  
G. A. Prinz ◽  
J. J. Krebs ◽  
K. B. Hathaway
Keyword(s):  
Phase Transition ◽  
Single Crystal ◽  
Magnetic Phase Transition ◽  
Magnetic Phase ◽  
Iron Films ◽  
First Order ◽  
Order Magnetic Phase Transition

ChemInform Abstract: Magnetization, Crystal Structure and Anisotropic Thermal Expansion of Single-Crystal SrEr2O4.

ChemInform ◽  
2015 ◽  
Vol 46 (10) ◽  
pp. no-no
Author(s):  
Hai-Feng Li ◽  
Andrew Wildes ◽  
Binyang Hou ◽  
Cong Zhang ◽  
Berthold Schmitz ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thermal Expansion ◽  
Single Crystal ◽  
Anisotropic Thermal Expansion

Thermal expansion anisotropy of a LiY0.5Er0.5F4 single crystal

1975 ◽  
Vol 10 (8) ◽  
pp. 1462-1463 ◽  
Author(s):  
J. S. Abell ◽  
I. R. Harris ◽  
B. Cockayne
Keyword(s):  
Thermal Expansion ◽  
Single Crystal ◽  
Thermal Expansion Anisotropy

TERBIUM MOLYBDATE: GROUP THEORY AND FLUCTUATIONS

1987 ◽  
Vol 01 (05n06) ◽  
pp. 239-244
Author(s):  
SERGE GALAM
Keyword(s):  
Fixed Point ◽  
Group Theory ◽  
Parameter Space ◽  
Landau Theory ◽  
Two Dimensional ◽  
Stable Fixed Point ◽  
Theory Analysis ◽  
Continuous Transition ◽  
Dimensional Parameter ◽  
First Order

A new mechanism to explain the first order ferroelastic—ferroelectric transition in Terbium Molybdate (TMO) is presented. From group theory analysis it is shown that in the two-dimensional parameter space ordering along either an axis or a diagonal is forbidden. These symmetry-imposed singularities are found to make the unique stable fixed point not accessible for TMO. A continuous transition even if allowed within Landau theory is thus impossible once fluctuations are included. The TMO transition is therefore always first order. This explanation is supported by experimental results.

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