Results 61 to 70 of about 6,016 (192)

Anisotropy of superconducting MgB2 as seen in electron spin resonance and magnetization data [PDF]

, 2001
We have observed the conduction electron spin resonance (CESR) in fine powders of MgB2 both in the superconducting and normal states. The Pauli susceptibility is chi_s=2.0*10^{-5} emu/mole in the temperature range of 450 to 600 K.
A. Janossy, A. Jánossy, C. Petrovic, D. K. Finnemore, F. Murányi, F. Simon, G. Lapertot, J. Kortus, J. Nagamatsu, J. Winter, L. Forró, N. M. Nemes, O. F. de Lima, P. C. Canfield, P. C. Canfield, P. G. de Gennes, S. Garaj, S. L. Bud'ko, S. L. Bud'ko, S. L. Bud'ko, S. Patnaik, T. Fehér, V. G. Kogan, V. G. Kogan, V. G. Kogan, Y. Wang, Y. Yafet   +26 more
core   +3 more sources

Magneto‐Tunable Thermal Diode Based on Bulk Superconductor

Advanced Physics Research, Volume 4, Issue 12, December 2025.
A thermal diode based on bulk superconducting materials is developed. Using the sharp change in thermal conductivity and its temperature dependence of Pb near the superconducting transition, Pb–Al junction works as a thermal diode with thermal rectification ratio (TRR) of 1.75. The working temperature can be tuned by applied magnetic field.
Poonam Rani, Masayuki Mashiko, Keisuke Hirata, Ken‐ichi Uchida, Yoshikazu Mizuguchi   +4 more
wiley   +1 more source

DC‐Driven Fractional Flux Quanta in Two‐Band Superconductors

physica status solidi (RRL) – Rapid Research Letters, Volume 19, Issue 12, December 2025.
The dc‐driven distancing of fractional flux quanta is theoretically analyzed for a dual‐band superconductor with a periodic pinning potential. The analysis is based on the dynamical equation of motion for a single composite vortex. The model neglects the phase difference between the condensates and may be applicable to two‐band superconductors with ...
Anton O. Pokusinskyi, Oleksandr V. Dobrovolskiy   +1 more
wiley   +1 more source

Soft x-ray spectroscopy experiments on the near K-edge of B in MB2 (M=Mg, Al, Ta, and Nb)

, 2001
Soft X-ray absorption and emission measurements are performed for the K- edge of B in MB$_2$ (M=Mg, Al, Ta and Nb). Unique feature of MgB$_2$ with a high density of B 2$p_{xy}(\sigma)$-state below and above the Fermi edge, which extends to 1 eV above the
A.S. Cooper, David L. Ederer, G. Satta, H. Schmidt, J. Kortus, J. Nagamatsu, J.J. Jia, J.M. An, J.S. Slusky, Jin Nakamura, Jonathan D. Denlinger, K. Kuroki, K.D. Belashchenko, Kazuhiko Kuroki, L. Leyarovskaya, Nobuyoshi Yamada, Rupert C. C. Perera, S.L. Bud’ko, T.A. Callcott, Thomas A. Callcott, Y. Kong   +20 more
core   +1 more source

Overcritical state in superconducting round wires sheathed by iron [PDF]

, 2004
Magnetic measurements carried out on MgB_2 superconducting round wires have shown that the critical current density J_c(B_a) in wires sheathed by iron can be significantly higher than that in the same bare (unsheathed) wires over a wide applied magnetic ...
Alexey V. Pan, Kontorowitz A. R., Shixue Dou   +2 more
core   +3 more sources

Ambient Condition Superconductivity via Engineered Polaronic Environment

physica status solidi (RRL) – Rapid Research Letters, Volume 19, Issue 12, December 2025.
A novel strategy for increasing the critical temperature T c of superconductors is proposed. It involves mating ultrathin layers of superconductors (e.g. MgB2) and metal‐organic framework materials, with a renormalized dielectric response yielding a new system with strengthened Cooper pairing via resonant antishielding.
Krzysztof Kempa, Michael J. Naughton
wiley   +1 more source

RVB Contribution to Superconductivity in $MgB_2$

, 2001
We view $MgB_2$ as electronically equivalent to (non-staggered) graphite ($B^-$ layer) that has undergone a zero gap semiconductor to a superconductor phase transition by a large c-axis (chemical) pressure due to $Mg^{++}$ layers.
A. Gerashenko, C. Panagopoulos, Ch. Walti, D.S. Fisher, G. Baskaran, G. Baskaran, G. Baskaran, G. Satta, H. Kotegawa, J. An, J. Gonzalez, J. Gonzalez, J. Kortus, J. Nagamatsu, J.E. Hirsch, J.K. Jung, K. Yamaji, K.D. Belschchenko, M. Imada, N. Furukawa, P.W. Anderson, S. Kivelson, S. Kuwajima, S. Sorella, S. Xu, S.L. Bud’ko, T. Takahashi, T. Takenobu, Y. Anusooya, Y. Kong   +29 more
core   +1 more source

Paramagnetic Meissner effect in MgB2 superconductor

, 2002
This paper has been ...
Horvat, J., Wang, X. L., Soltanian, S., Dou, S. X.   +3 more
openaire   +2 more sources

Penetration Depth Measurements in MgB_2: Evidence for Unconventional Superconductivity

, 2001
We have measured the magnetic penetration depth of the recently discovered binary superconductor MgB_2 using muon spin rotation and low field $ac$-susceptibility.
A. Porch, A. Sharoni, B. D. Rainford, B. Pumpin, C. A. Scott, C. Bernhard, C. Panagopoulos, C. Panagopoulos, C. Panagopoulos, C. Panagopoulos, D. Shoenberg, D.A. Bonn, G. Karapetrov, G. Rubio-Bollinger, H. Schmidt, I. H. Inoue, J. Nagamatsu, J.E. Sonier, M. Kambara, M. Weber, P. Pincus, P.J. Hirschfeld, S.L. Bud’ko, T. Xiang, W. Barford, Y.J. Uemura   +25 more
core   +1 more source

Anisotropy of the Characteristic Critical Fields and Length Scales of Sr1 − xKxFe2As2 Superconductor

Advanced Physics Research, Volume 4, Issue 10, October 2025.
The upper critical magnetic field parallel to ab‐plane (HC2∥ab${\mathrm{H}}_{C2\Vert \textit{ab}}$) and upper critical magnetic field parallel to ‐caxis (HC2∥c$\mathrm{H}_{C2}^{\parallel c}$) decrease with temperature increase and vanish at the critical temperature. The angular dependence of upper critical magnetic field (HC2) show anisotropic behavior.
Gedefaw Mebratie, Tamiru Negussie, Geberegziabher Kahsay   +2 more
wiley   +1 more source