459 citations · 1.9k across the 19 of their papers we have counts for
15 papers · 1 filter
Thermodynamic origin of the peak effect in the superconductor Nb3Sn
R. Lortz, N. Musolino, Y. Wang +2
We report a pronounced peak effect in the magnetization and the magnetocaloric coefficient in a single crystal of the superconductor Nb3Sn. As the origin of the magnetization peak…
Thermal fluctuations and vortex melting in the classical superconductor Nb3Sn from high-resolution specific-heat measurements
R. Lortz, F. Lin, N. Musolino +4
The range of critical thermal fluctuations in classical bulk superconductors is extremely small and especially in low fields hardly experimentally inaccessible. With a new type of…
On the Origin of the Double Superconducting Transition in Overdoped YBa2Cu3Ox
R. Lortz, T. Tomita, Y. Wang +4
The superconducting transition in a single overdoped, detwinned YBa2Cu3Ox (YBCO) crystal is studied using four different probes. Whereas the AC and DC magnetic susceptibilities fin…
Evolution of the specific-heat anomaly of the high-temperature superconductor YBa2Cu3O7 under influence of doping through application of pressure up to 10 GPa
Rolf Lortz, Alain Junod, Didier Jaccard +4
The evolution of the specific-heat anomaly in the overdoped range of a single crystal of the high-temperature superconductor YBa2Cu3O7 has been studied under influence of pressure…
Specific heat, magnetic susceptibility, resistivity and thermal expansion of the superconductor ZrB12
R. Lortz, Y. Wang, S. Abe +4
In an attempt to clarify conflicting published data, we report new measurements of specific heat, resistivity, magnetic susceptibility, and thermal expansivity up to room temperatu…
Specific heat and magnetization of a ZrB12 single crystal: characterization of a type II/1 superconductor
Yuxing Wang, Rolf Lortz, Yuriy Paderno +4
We measured the specific heat, the magnetization, and the magnetoresistance of a single crystal of ZrB12, which is superconducting below Tc ~ 6 K. The specific heat in zero field s…
Reversible and irreversible magnetocaloric effect in the NdBa_2Cu_3O_7 superconductor in relation with specific heat and magnetization
T. Plackowski, Y. Wang, R. Lortz +2
A recently developed technique for measuring the isothermal magnetocaloric coefficient () is applied to the study of a superconducting NdBaCuO single crystal. Resu…
Unusual effects of anisotropy on the specific heat of ceramic and single crystal MgB2
F. Bouquet, Y. Wang, I. Sheikin +6
The two-gap structure in the superconducting state of MgB_2 gives rise to unusual thermodynamic properties which depart markedly from the isotropic single-band BCS model, both in t…
Specific heat of MgB_2 after irradiation
Yuxing Wang, Frederic Bouquet, Ilya Sheikin +6
We studied the effect of disorder on the superconducting properties of polycrystalline MgB_2 by specific-heat measurements. In the pristine state, these measurements give a bulk co…
Specific heat of single crystal MgB_2: a two-band superconductor with two different anisotropies
F. Bouquet, Y. Wang, I. Sheikin +4
Heat-capacity measurements of a 39 microgramm MgB_2 single crystal in fields up to 14 T and below 3 K allow the determination of the low-temperature linear term of the specific hea…
Phenomenological two-gap model for the specific heat of MgB_2
F. Bouquet, Y. Wang, R. A. Fisher +4
We show that the specific heat of the superconductor MgB_2 (MgB2) in zero field, for which significant non-BCS features have been reported, can be fitted, essentially within experi…
Specific heat of the 38-K superconductor MgB_2 in the normal and superconducting state: bulk evidence for a double gap
Alain Junod, Yuxing Wang, Frederic Bouquet +1
The specific heat of two polycrystalline samples of MgB_2 is presented and analyzed (2 - 300 K, 0 - 16 T), together with magnetic properties. The main characteristics are a low den…
Specific heat in the superconducting and normal state (2-300 K, 0-16 Teslas), and magnetic susceptibility of the 38-K superconductor MgB2: evidence for a multicomponent gap
Y. Wang, T. Plackowski, A. Junod
The specific heat C of a sintered polycrystalline sample of MgB2 with a bulk superconducting transition temperature Tc=36.7 K is measured as a function of the temperature (2-300 K)…
Direct Observation and Anisotropy of the Contribution of Gap nodes in the Low Temperature Specific Heat of YBa_2Cu_3O_7
Yuxing Wang, Bernard Revaz, Andreas Erb +1
The specific heat due to line nodes in the superconducting gap of YBa2Cu3O7 has been obscured up to now by magnetic terms of extrinsic origin, even for high quality crystals. We re…
Experimental evidence for fast cluster formation of chain oxygen vacancies in YBa2Cu3O7-d being at the origin of the fishtail anomaly
Andreas Erb, Alfred A. Manuel, Marc Dhalle +13
We report on three different and complementary measurements, namely magnetisation measurements, positron annihilation spectroscopy and NMR measurements, which give evidence that th…