Universal logarithmic temperature dependence of magnetic susceptibility of one-dimensional electrons at critical values of magnetic field

The temperature dependence of spin currents in insulators at the finite temperature near zero Kelvin is theoretically studied. The spin currents are carried by Jordan–Wigner fermions and magnons in one- and three-dimensional insulators. These spin currents are generated by the external magnetic field gradient along the quantization axis and also by the two-particle interaction gradient. In one-dimensional insulators, quantum fluctuations are strong and the spin current carried by Jordan–Wigner fermions shows the stronger dependence on temperatures than the one by magnons.

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STRUCTURAL, ELECTRICAL AND MAGNETIC PROPERTIES OF HIGH-TcYBa1.5Ca0.5Cu3O6+δ SUPERCONDUCTOR

Modern Physics Letters B ◽

10.1142/s0217984996001528 ◽

1996 ◽

Vol 10 (27) ◽

pp. 1349-1353

Author(s):

I. POP ◽

L. HOMORODEAN ◽

I. BURDA ◽

M. ANDRECUT

Keyword(s):

Magnetic Field ◽

Magnetic Properties ◽

Magnetic Susceptibility ◽

Critical Temperature ◽

Temperature Dependence ◽

Crystalline Structure ◽

Magnetic Field Intensity ◽

Electrical And Magnetic Properties ◽

Diamagnetic Transition ◽

The Magnetic Field

A high-Tc YBa 1.5 Ca 0.5 Cu 3 O 6+δ superconductor was synthesized, with the critical temperature Tc=84.9 K. The crystalline structure is orthorhombic with the lattice parameters a=3.8665 Å, b=3.9217 Å and c=11.7652 Å, characteristic for the 123 superconductors. The diamagnetic transition in the temperature dependence of the magnetic susceptibility strongly depends on the recycling of the samples and the onset of superconductibility is depressed by the magnetic field intensity.

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Nuclear orientation of 54Mn in magnetically ordered MnCl2∙4H2O

Canadian Journal of Physics ◽

10.1139/p77-195 ◽

1977 ◽

Vol 55 (17) ◽

pp. 1526-1540 ◽

Cited By ~ 14

Author(s):

R. L. A. Gorling ◽

B. G. Turrell ◽

P. W. Martin

Keyword(s):

Magnetic Field ◽

Field Theory ◽

Heat Transfer ◽

Magnetic Susceptibility ◽

Temperature Dependence ◽

Nuclear Orientation ◽

Antiferromagnetic Phase ◽

Molecular Fields ◽

Antiferromagnetic Spin

The antiferromagnetic, spin-flop, and paramagnetic phases of MnCl2∙4H2O have been investigated by observing the nuclear orientation of radioactive 54Mn in a single crystal of the salt. The directions of the sublattice magnetizations in the absence of an external magnetic field were determined. The field dependence of the sublattice magnetizations in the spin-flop state indicated that second order anisotropy is significant in this system. Furthermore, the measurements allowed the determination of the molecular fields in the molecular field theory. The spin-flop transition region was found to be described adequately by a domain structure in which regions of antiferromagnetic phase and spin-flop phase co-exist in the crystal. The temperature dependence of the spin-flop field was determined by magnetic susceptibility measurements. It was found that the spin-flop field decreases with decreasing temperature down to temperatures less than 0.1 K contrary to previous reports. The cooling of the specimen in contact with a copper heat sink was investigated and the temperature dependence of the heat transfer is discussed. An attempt to observe magnetic resonance of the oriented nuclei was unsuccessful.

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ANISOTROPY IN THE MAGNETIC SUSCEPTIBILITY OF THE QUASI-ONE-DIMENSIONAL CONDUCTOR Nb3Te4

Modern Physics Letters B ◽

10.1142/s0217984995001716 ◽

1995 ◽

Vol 09 (25) ◽

pp. 1693-1695 ◽

Cited By ~ 1

Author(s):

YIN JIANG ◽

DOU AO-CHUAN ◽

ZHU MIN ◽

LIU ZHI-GUO

Keyword(s):

Magnetic Susceptibility ◽

Temperature Dependence ◽

Single Crystals ◽

The Other ◽

One Dimensional

We have measured the temperature dependence of the magnetic susceptibility of Nb 3 Te 4 single crystals along the chain direction (c-axis) and perpendicular to the chain direction. Two anomalies were observed, one around 110 K and the other around 50 K, and the anisotropy in the magnetic susceptibility of Nb 3 Te 4 single crystals is obvious.

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The De Haas–Van Alphen effect at high temperatures and in low magnetic fields in semiconductors

Modern Physics Letters B ◽

10.1142/s0217984916500779 ◽

2016 ◽

Vol 30 (07) ◽

pp. 1650077 ◽

Cited By ~ 4

Author(s):

G. Gulyamov ◽

U. I. Erkaboev ◽

N. Yu. Sharibaev

Keyword(s):

Magnetic Field ◽

Magnetic Susceptibility ◽

Magnetic Fields ◽

Temperature Dependence ◽

High Temperatures ◽

Density Of States ◽

Effect Of Temperature ◽

Method Of Calculation

We developed the method of calculation of the temperature dependence of the magnetic susceptibility. We considered the de Haas–van Alphen (dHvA) effect in semiconductors at high temperatures and low magnetic fields. The effect of temperature on dHvA effect is explained with respect to the temperature dependence of the thermodynamic density of states in a magnetic field.

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