scholarly journals Critical fields and fluctuations determined from specific heat and magnetoresistance in the same nanogram SmFeAs(O,F) single crystal

2017 ◽  
Vol 96 (10) ◽  
Author(s):  
S. Galeski ◽  
P. W. J. Moll ◽  
N. Zhigadlo ◽  
K. Mattenberger ◽  
B. Batlogg
Keyword(s):  
Single Crystal ◽  
Specific Heat ◽  
Critical Fields

scholarly journals Experimental signatures of nodeless multiband superconductivity in a $$\hbox {2H-Pd}_{0.08} \hbox {TaSe}_2$$ single crystal

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Chanhee Kim ◽  
Dilip Bhoi ◽  
Yeahan Sur ◽  
Byung-Gu Jeon ◽  
Dirk Wulferding ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Single Crystal ◽  
Zero Magnetic Field ◽  
Anisotropy Ratio ◽  
Strong Temperature Dependence ◽  
Critical Fields ◽  
Band Theory ◽  
Plane Field ◽  
Low Field ◽  
Out Of Plane

AbstractIn order to understand the superconducting gap nature of a $$\hbox {2H-Pd}_{0.08} \hbox {TaSe}_2$$ 2H-Pd 0.08 TaSe 2 single crystal with $$T_{c} = 3.13 \text { K}$$ T c = 3.13 K , in-plane thermal conductivity $$\kappa $$ κ , in-plane London penetration depth $$\lambda _{\text {L}}$$ λ L , and the upper critical fields $$H_{c2}$$ H c 2 have been investigated. At zero magnetic field, it is found that no residual linear term $$\kappa _{0}/T$$ κ 0 / T exists and $$\lambda _{\text {L}}$$ λ L follows a power-law $$T^n$$ T n (T: temperature) with n = 2.66 at $$T \le \frac{1}{3}T_c$$ T ≤ 1 3 T c , supporting nodeless superconductivity. Moreover, the magnetic-field dependence of $$\kappa _{0}$$ κ 0 /T clearly shows a shoulder-like feature at a low field region. The temperature dependent $$H_{c2}$$ H c 2 curves for both in-plane and out-of-plane field directions exhibit clear upward curvatures near $$T_c$$ T c , consistent with the shape predicted by the two-band theory and the anisotropy ratio between the $$H_{c2}$$ H c 2 (T) curves exhibits strong temperature-dependence. All these results coherently suggest that $$\hbox {2H-Pd}_{0.08} \hbox {TaSe}_2$$ 2H-Pd 0.08 TaSe 2 is a nodeless, multiband superconductor.

scholarly journals Doping dependence of the specific heat of single-crystal BaFe2(As1−xPx)2

2012 ◽  
Vol 85 (18) ◽  
Author(s):  
C. Chaparro ◽  
L. Fang ◽  
H. Claus ◽  
A. Rydh ◽  
G. W. Crabtree ◽  
...  
Keyword(s):  
Single Crystal ◽  
Specific Heat ◽  
Doping Dependence

Specific heat of single crystal Ba0.6K0.4BiO3 at low temperatures

1996 ◽  
Vol 97 (3) ◽  
pp. 175-178 ◽  
Author(s):  
E.B. Nyeanchi ◽  
D.F. Brewer ◽  
T.E. Hargreaves ◽  
N.E. Hussey ◽  
A.L. Thomson ◽  
...  
Keyword(s):  
Single Crystal ◽  
Specific Heat ◽  
Low Temperatures

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.

Low-temperature specific heat of Ti0.5V0.5 single crystal

1997 ◽  
Vol 237-238 ◽  
pp. 607-608
Author(s):  
K. Tsutsumi ◽  
S. Takayanagi ◽  
T. Hirano
Keyword(s):  
Low Temperature ◽  
Single Crystal ◽  
Specific Heat ◽  
Low Temperature Specific Heat

scholarly journals UPt3: Specific heat, critical fields, and the Ginzburg-Landau models for the superconducting phase diagram

1993 ◽  
Vol 48 (9) ◽  
pp. 6385-6399 ◽  
Author(s):  
T. Vorenkamp ◽  
A. de Visser ◽  
R. Wester ◽  
A. A. Menovsky ◽  
J. J. M. Franse ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Specific Heat ◽  
Superconducting Phase ◽  
Critical Fields ◽  
Ginzburg Landau

Anisotropic Upper Critical Field of Single Crystal RNi2B2C (R = Y, Lu)

1998 ◽  
Vol 12 (29n31) ◽  
pp. 3264-3266 ◽  
Author(s):  
A. C. Du Mar ◽  
K. D. D. Rathnayaka ◽  
D. G. Naugle ◽  
P. C. Canfield
Keyword(s):  
Low Temperature ◽  
Single Crystal ◽  
Critical Field ◽  
Upper Critical Field ◽  
Critical Fields ◽  
Linear Behavior ◽  
Upward Curvature

Measurements of the anisotropic upper critical field curves have been extended for YNi 2B2C and LuNi2B2C (T c = 15.6 K and 16.1 K, respectively). Measurements of R(T, H) were taken along the crystallographic directions of <100> and <110>. The resulting critical fields show an upward curvature near T c and a linear behavior at low temperature, which continues to below 2 K with little, if any, sign of saturation.

Critical fields and specific heat ofLuNi2B2C

2001 ◽  
Vol 63 (13) ◽  
Author(s):  
G. M. Schmiedeshoff ◽  
J. A. Detwiler ◽  
W. P. Beyermann ◽  
A. H. Lacerda ◽  
P. C. Canfield ◽  
...  
Keyword(s):  
Specific Heat ◽  
Critical Fields
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