Second-peak effect in a superconducting (Tl, Bi)-1212 single crystal by ac susceptibility: Evidence for vortex plastic behavior

1998 ◽  
Vol 58 (17) ◽  
pp. 11692-11697 ◽  
Author(s):  
T. Aouaroun ◽  
Ch. Simon
Keyword(s):  
Single Crystal ◽  
Ac Susceptibility ◽  
Peak Effect ◽  
Plastic Behavior ◽  
Second Peak

Growth of high-quality Bi2Sr2CaCu2Oz crystal and characterization

1997 ◽  
Vol 12 (10) ◽  
pp. 2522-2525 ◽  
Author(s):  
H. Faqir ◽  
G. Vacquier ◽  
H. Chiba ◽  
M. Kikuchi ◽  
Y. Muraoka ◽  
...  
Keyword(s):  
Single Crystal ◽  
Stoichiometric Composition ◽  
Peak Effect ◽  
Structure Characterization ◽  
X Ray Diffraction ◽  
High Quality ◽  
Growth Technique ◽  
Composition Structure ◽  
Second Peak

We report growth of high-quality Bi2Sr2CaCu2Oz single crystals with dimensions 2 × 1 × 0.03 mm3 with a melt and growth technique. The composition of this crystal is homogeneous and very close to the stoichiometric composition. Structure characterization of a single crystal was realized by measuring the (001) x-ray diffraction. The lattice parameters of a typical crystal are a = 5.414(2) Å, b = 5.413(2) Å, and c = 30.823(10) Å. The superconducting temperature Tc = 95 K with a sharp transition width (10–90% level) between 6 and 10 K was determined from resistivity and dc susceptibility. We have measured the magnetization of Bi2Sr2CaCu2Oz single crystal under magnetic field applied along the c-axis. The anomalous second peak effect appeared between 20 and 30 K. We discuss the qualities of these crystals.

The second peak effect observed in Sr-overdoped (La1−xSrx)2CuO4−δ single crystals with various oxygen deficiencies δ

1996 ◽  
Vol 271 (3-4) ◽  
pp. 265-271 ◽  
Author(s):  
Masayuki Okuya ◽  
Takao Sasagawa ◽  
Tsuyoshi Kimura ◽  
Jun-ichi Shimoyama ◽  
Koichi Kitazawa ◽  
...  
Keyword(s):  
Single Crystals ◽  
Peak Effect ◽  
Second Peak

Second peak effect in SmBa2Cu3Oy

2003 ◽  
Vol 386 ◽  
pp. 73-76 ◽  
Author(s):  
S.Y. Ding ◽  
X. Leng ◽  
H. Luo ◽  
Y. Liu ◽  
L. Xiao ◽  
...  
Keyword(s):  
Peak Effect ◽  
Second Peak

scholarly journals Influence of Crystallite Size on the Magnetic Order in Semiconducting ZnCr2Se4 Nanoparticles

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3947 ◽  
Author(s):  
Ewa Malicka ◽  
Małgorzata Karolus ◽  
Tadeusz Groń ◽  
Adrian Gudwański ◽  
Andrzej Ślebarski ◽  
...  
Keyword(s):  
Single Crystal ◽  
Specific Heat ◽  
Spin Glass ◽  
Crystallite Size ◽  
Magnetic Order ◽  
Ac Susceptibility ◽  
High Energy ◽  
Zero Field ◽  
Bulk Single Crystal ◽  
Field Cooling

Structural, electrical, magnetic, and specific heat measurements were carried out on ZnCr2Se4 single crystal and on nanocrystals obtained from the milling of this single crystal after 1, 3, and 5 h, whose crystallite sizes were 25.2, 2.5, and 2 nm, respectively. For this purpose, the high-energy ball-milling method was used. The above studies showed that all samples have a spinel structure, and are p-type semiconductors with less milling time and n-type with a higher one. In turn, the decrease in crystallite size caused a change in the magnetic order, from antiferromagnetic for bulk material and nanocrystals after 1 and 3 h of milling to spin-glass with the freezing temperature Tf = 20 K for the sample after 5 h of milling. The spin-glass behavior for this sample was derived from a broad peak of dc magnetic susceptibility, a splitting of the zero-field-cooling and field-cooling susceptibilities, and from the shift of Tf towards the higher frequency of the ac susceptibility curves. A spectacular result for this sample is also the lack of a peak on the specific heat curve, suggesting a disappearance of the structural transition that is observed for the bulk single crystal.

Angular dependent study of the peak effect phenomenon in a weakly pinned single crystal of LuNi2B2C

2007 ◽  
Vol 460-462 ◽  
pp. 1215-1217 ◽  
Author(s):  
D. Jaiswal Nagar ◽  
T. Isshiki ◽  
N. Kimura ◽  
H. Aoki ◽  
S. Ramakrishnan ◽  
...  
Keyword(s):  
Single Crystal ◽  
Peak Effect

Dimensional crossover and peak effect in a superconducting Pr1.85Ce0.15CuO4-y single crystal

1997 ◽  
Vol 273 (3-4) ◽  
pp. 268-274 ◽  
Author(s):  
M.C. de Andrade ◽  
G. Triscone ◽  
M.B. Maple ◽  
S. Spagna ◽  
J. Diederichs ◽  
...  
Keyword(s):  
Single Crystal ◽  
Peak Effect ◽  
Dimensional Crossover
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