BULLETIN OF THE LEBEDEV PHYISICS INSTITUTE
P.N.Lebedev Physics Institute of the Russian Academy of sciences

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1. Title:
THERMAL EXPANSION OF THE HTSC SYSTEM Bi2Sr2−xLaxCuO6: THE EFFECT OF MAGNETIC FIELD AND DOPING
Authors:
N.V. Anshukova, A.I. Golovashkin, L.I. Ivanova, I.B. Krynetskii, A.P. Rusakov.



Abstract:
The thermal expansion of Bi2Sr2−xLaxCuO6 single crystals with different doping levels was measured at low temperatures. The magnetic field effect on the Bi2Sr2−xLaxCuO6 thermal expansion was studied. At T < 20 K, an anomalous (negative) thermal expansion was revealed whose characteristics depend on the level of sample doping. These characteristics were found to be strongly affected by a moderate magnetic field. The experimental results confirmed the conclusions suggested by the model which explains the anomalous thermal expansion in high-temperature superconductors (HTSC) at low temperatures and the strong effect of the magnetic field on it by a stabilizing role of the charge density wave (CDW) in the oxygen sublattice.


2. Title:
SIMPLE DUAL-STAGE METHOD OF COOLING IN THE REGION OF ??-POINT OF He4: SCHEME AND POSSIBLE APPLICATIONS
Authors:
A.I. Golovashkin, V.M. Mishachev, A.M. Tskhovrebov, I.V. Berlov, G.N. Izmailov.



Abstract:


3. Title:
CLASSIFICATION BY OPTICAL PROPERTIES AND CONICAL REFRACTION IN MEDIA WITH NON-CUMMUTING PERMITTIVITY AND PERMEABILITY TENSORS
Authors:
N.A. Zhura.



Abstract:


4. Title:
SUPERSONIC ION FLOW IN EXPERIMENTS WITH PLASMA-DUST STRUCTURES
Authors:
S.A. Maiorov.



Abstract:


5. Title:
LIGHT AMPLIFIER/CONVERTER BASED ON TERBIUM SALICYLATE
Authors:
L.S. Lepnev, A.A. Vashchenko, A.G. Vitukhnovskii, S.V. Eliseeva, O.V. Kotova, N.P. Kuzmina.



Abstract: