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The problem of the surface microwave impedance of a superconducting film in a static magnetic field H parallel to the surface is considered. In films of thickness d < λ d < λ (λ is the London penetration depth) the mixed state for a parallel orientation of the external field is a set of vortex...
The transport and magnetoresistive properties of bulk polycrystalline samples of the La 0.7 Ca 0.3 Mn 1− x Cu x O 3− δ La 0.7 Ca 0.3 Mn 1 − x Cu x O 3 − δ ( x ⩽ 0.15) ( x ⩽ 0.15 ) system are studied in the temperature range 77 K–300 K. All the samples investigated exhibit the...
For group-V transition metals (Nb, Ta) containing different concentrations of interstitial impurities (O, C, N, H) and deformation-induced defects, a numerical calculation of various effective microscopic characteristics averaged over the Fermi surface and of the band parameters in the framework...
A structure is proposed for the magnetoelastic antiferromagnetic domains in easy-plane antiferromagnets of the iron-group dihalides. The proposed structure is made up of a triad of regions with 120° 120 ° rotation of the antiferromagnetic vector on passing between adjacent regions. This domain...
The anisotropy of the magnetic flux creep in vortex motion parallel to the planes of twin boundaries is investigated experimentally. It is shown that at relatively low magnetic fields the creep velocity is independent of the magnetic field and of the angle α ≡ ∠ H , a b . α ≡ ∠ H , a b...
Based on a simple model for the ordering of hexagons on a square planar lattice, an attempt is made to consider the possible structure of C 60 C 60 fullerite in its low-temperature phase. It is shown that hexagons representing fullerenes oriented along the C 3 C 3 axes of the sc lattice can be...
The magnetic contribution to the dynamic dielectric susceptibility tensor χ α β ( ω ) = χ 1 α β ( ω )+ i χ 2 α β ( ω ) χ α β ( ω ) = χ 1 α β ( ω ) + i χ 2 α β ( ω ) of a system of randomized quasilocal optical dipoles of a magnetic conductor is calculated by the method of...
A simple qualitative explanation for the bell-shaped form of the functions T c ( n f ) T c ( n f ) in solid C 60 C 60 is proposed ( T c ( T c is the critical temperature of the superconducting transition, and n f n f is the number of carriers (fermions)—electrons or holes—per molecule). This...
The spectrum of normal vibrational modes propagating along the direction of an external static magnetic field in conductors with a sharply anisotropic dispersion relation of the charge carriers is obtained with allowance for their Fermi-liquid interaction. © 2001 American Institute of Physics.
The thermal conductivity κ κ of extended crystals of fullerite C 60 C 60 with transverse dimensions L of the order of a few millimeters is measured at low temperatures (down to 0.6 K). It is found that in the range from 7 to 0.6 K the temperature dependence of the thermal conductivity of the...
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