| Records |
| Author |
Luzuriaga, J.; de la Cruz, F. |
| Title |
Reversible magnetization of surface superconductivity |
Type |
Journal Article |
| Year |
1978 |
Publication |
Solid State Communications |
Abbreviated Journal |
Solid State Commun |
| Volume |
25 |
Issue |
8 |
Pages |
605-607 |
| Keywords |
MAGNETIZATION; SUPERCONDUCTING MATERIALS |
| Abstract |
Direct measurements of the surface superconducting magnetization of the PbTl system shows that this state is a thermodynamic reversible one. |
| Address |
Centro Atómico Bariloche |
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00381098 (ISSN) |
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no |
| Call Number |
BT @ luzuriag @ |
Serial  |
505 |
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| Author |
de la Cruz, M.E.; Godfrin, E.J.P.; de la Cruz, F.; de Allende, C. |
| Title |
Superconducting intermediate state in cadmium |
Type |
Journal Article |
| Year |
1976 |
Publication |
Solid State Communications |
Abbreviated Journal |
Solid State Commun. |
| Volume |
18 |
Issue |
6 |
Pages |
747-749 |
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| Abstract |
Perpendicular magnetic critical fields for cadmium foils were measured to thicknesses below the temperature dependent coherence length. The presence of supercooling indicates first-order thermodynamic transitions for all samples. A modification of Davies' model leads to a good fit of the experimental data. |
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0038-1098 |
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no |
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BT @ pedrazp @ |
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528 |
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| Author |
Esquinazi, P.; de la Cruz, M.E.; Ridner, A.; de la Cruz, F. |
| Title |
Heat treatment effects in amorphous metals: Zr70Cu30 and La70Cu30 |
Type |
Journal Article |
| Year |
1982 |
Publication |
Solid State Communications |
Abbreviated Journal |
Solid State Commun. |
| Volume |
44 |
Issue |
6 |
Pages |
941-944 |
| Keywords |
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| Abstract |
We measured the electrical resistivity (4–300 K), superconducting critical temperature and thermal conductivity (0.5–7 K) of the amorphous metals Zr70Cu30 and La70Cu30. Heat treatments below crystallization temperature induced changes in these properties. In particular, in the first stage of the annealing of Zr70Cu30 there are systematic changes in the thermal conductivity and the critical temperature, while the electrical resistivity remains constant. We show that there is no simple correlation between the thermal conductivity processes in the low temperature and plateau regions. We also show that the thermal conductivity of as quenched La70Cu30 is typical of amorphous metals, contrary to information previously reported. |
| Address |
Centro Atómico Bariloche – Instituto Balseiro |
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0038-1098 |
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no |
| Call Number |
BT @ pedrazp @ |
Serial |
529 |
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| Author |
Esquinazi, P.; de la Cruz, M.E.; de la Cruz, F. |
| Title |
Heat treatment effects in La70Cu30 amorphous system |
Type |
Journal Article |
| Year |
1981 |
Publication |
Physica B+C |
Abbreviated Journal |
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| Volume |
108B |
Issue |
1-3 |
Pages |
1215-1216 |
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| Abstract |
It is shown that superconductivity is a useful tool to investigate the evolution of the amorphous state, when heat treatment below the crystallization temperature. |
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| ISSN |
0378-4363 |
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no |
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BT @ pedrazp @ |
Serial |
530 |
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| Author |
Arce, R.; de la Cruz, F.; Guimpel, J. |
| Title |
Superconducting behavior of amorphous Zr70Cu30 |
Type |
Journal Article |
| Year |
1983 |
Publication |
Solid State Communications |
Abbreviated Journal |
Solid State Commun. |
| Volume |
47 |
Issue |
11 |
Pages |
885-887 |
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| Abstract |
Measurement of the Meissner penetration depth, λ(T) were made in amorphous Zr70Cu30 samples. The results indicate that this amorphous alloy behaves as a BCS superconductor with 2Δ(0)+45 degree rulekTc = 3.8, where Δ(0) is the superconducting energy gap at T=0 and Tc the critical temperature. It is also concluded that the low energy excitation, TLS, characteristics of amorphous material does not contribute to Tc. |
| Address |
Centro Atómico Bariloche – Instituto Balseiro |
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0038-1098 |
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no |
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BT @ pedrazp @ |
Serial |
532 |
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| Author |
Cotignola, J.M.; de la Cruz, F.; de la Cruz, M.E.; Platzeck, R.P. |
| Title |
Thermal Conductivity of Polycrystalline Zinc below 1 K |
Type |
Journal Article |
| Year |
1967 |
Publication |
Review of Scientific Instruments |
Abbreviated Journal |
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| Volume |
38 |
Issue |
1 |
Pages |
87-92 |
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| Abstract |
Measurements of the thermal conductivity of samples of polycrystalline zinc of thickness 0.1 mm have been carried out between 0.12 and 0.9°K in the normal as well as in the superconducting state to investigate the usefulness of zinc as a thermal switch. The conductivity in the normal state shows a linear dependence on temperature. In the superconducting state it shows a behavior typical of electronic conductivity down to the lowest temperature measured. By applying a magnetic field between 40 and 5000 Oe, magnetoresistivity was also investigated and a strong dependence of thermal conductivity on field was found. Electrical resistivity measurements were performed in magnetic fields at liquid 4He temperatures. The resistivity was found to be independent of temperature for fields up to 9000 Oe. The effect of solder joints using Cd, Sn, In, Zn, and Wood's metal was also investigated, Cd giving the least resistance. The measurements show that zinc should be a useful thermal switch for temperatures below 0.1 and 0.2°K, though effect of a magnetic field on the normal conductivity must be carefully considered. |
| Address |
Centro Atómico Bariloche – Instituto Balseiro |
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AIP |
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no |
| Call Number |
BT @ pedrazp @ cotignola:87 |
Serial |
533 |
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| Author |
Tutzauer, H.; Esquinazi, P.; de la Cruz, M.E.; de la Cruz, F. |
| Title |
Production of ribbon quenched samples using an arc furnace |
Type |
Journal Article |
| Year |
1980 |
Publication |
Review of Scientific Instruments |
Abbreviated Journal |
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| Volume |
51 |
Issue |
6 |
Pages |
855-856 |
| Keywords |
FABRICATION; QUENCHING; ELECTRIC ARCS; FURNACES; METALS; ROTATION; CYLINDERS; DATA; LANTHANUM ALLOYS; COPPER ALLOYS; GOLD ALLOYS |
| Abstract |
We describe a new device to produce ribbons of disordered metals by ultrarapid quenching combining an arc furnace with a rotating cylinder. The characterization of samples of disordered La70 Cu30 and La76Au24 prepared using this method shows good agreement with those obtained by other authors for the same alloys. |
| Address |
Centro Atómico Bariloche – Instituto Balseiro |
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AIP |
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no |
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BT @ pedrazp @ tutzauer:855 |
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534 |
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| Author |
Favaron, J.; de la Cruz, M.E.; Esquinazi, P.; de la Cruz, F. |
| Title |
Phase diagram and superconductive properties of splat-cooled CuxLa1-x |
Type |
Journal Article |
| Year |
1980 |
Publication |
Physical Review B |
Abbreviated Journal |
Phys. Rev. B |
| Volume |
21 |
Issue |
7 |
Pages |
2804-2808 |
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| Abstract |
The phase diagram of nonequilibrium, splat-cooled CuxLa1-x is interpreted by means of superconductive-transition and x-ray measurements. At the eutectic composition the material is shown to be in a highly disordered state. Measurements of dc resistance and ac susceptibility show that there are two different critical fields at the disordered concentration although there is a unique critical temperature. |
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American Physical Society |
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BT @ pedrazp @ PhysRevB.21.2804 |
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535 |
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| Author |
de la Cruz, F.; de la Cruz, M.E.; Cotignola, J.M. |
| Title |
Longitudinal Magnetomorphic Effect in Indium Films |
Type |
Journal Article |
| Year |
1967 |
Publication |
Physical Review |
Abbreviated Journal |
Phys. Rev. |
| Volume |
163 |
Issue |
3 |
Pages |
575-578 |
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American Physical Society |
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BT @ pedrazp @ PhysRev.163.575 |
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537 |
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| Author |
Guimpel, J.; de la Cruz, F.; Murduck, J.; Schuller, I.K. |
| Title |
Penetration depth of a superconducting superlattice |
Type |
Journal Article |
| Year |
1987 |
Publication |
Physical Review B |
Abbreviated Journal |
Phys. Rev. B |
| Volume |
35 |
Issue |
7 |
Pages |
3655-3656 |
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| Abstract |
We have measured the magnetic-flux expulsion of a superconducting superlattice and related it to the Meissner penetration depth. The temperature dependence of the penetration depth is in quantitative agreement with theoretical expectation based on mean-field theory. The zero-temperature penetration depth is found in excellent, quantitative agreement without adjustable parameters with theoretical predictions for dirty superconductors. |
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American Physical Society |
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Rapid Communications |
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no |
| Call Number |
BT @ pedrazp @ 10.1103/PhysRevB.35.3655 |
Serial |
538 |
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