4,398 research outputs found
Magnetic studies of GaN nanoceramics
The synthesis, morphology and magnetization measurements of GaN nanoceramics
obtained under high pressure are reported. In particular the effect of grain
size on magnetic properties of GaN nanopowders and nanoceramics was
investigated. It was found that for the GaN nanoceramic characterized by the
stronger deformation of nanocrystalline grains the diamagnetic signal changes
with external magnetic field similarly to the Meissner effect in
superconductors.Comment: 3 pages, 4 figures, accepted Appl.Phys.Let
SO(5) superconductor in a Zeeman magnetic field: Phase diagram and thermodynamic properties
In this paper we present calculations of the SO(5) quantum rotor theory of
high-T superconductivity in Zeeman magnetic field. We use the spherical
approach for five-component quantum rotors in three-dimensional lattice to
obtain formulas for critical lines, free energy, entropy and specific heat and
present temperature dependences of these quantities for different values of
magnetic field. Our results are in qualitative agreement with relevant
experiments on high-T cuprates.Comment: 4 pages, 2 figures, to appear in Phys. Rev. B, see http://prb.aps.or
Recent Developments: Ogundipe v. State: A Verdict Sheet Does Not Constitute the Final Verdict; A Verdict Sheet Is Not a Communication within Maryland Rule 4-326(d) Requiring Disclosure of Its Contents to the Parties Prior to Dismissal of the Jury
- …