Study of the Fine Structure in the High-Field Galvanomagnetic Properties and the Fermi Surface of Copper

1966 ◽  
Vol 141 (2) ◽  
pp. 592-603 ◽  
Author(s):  
J. R. Klauder ◽  
W. A. Reed ◽  
G. F. Brennert ◽  
J. E. Kunzler
Keyword(s):  
Fine Structure ◽  
Fermi Surface ◽  
High Field ◽  
Galvanomagnetic Properties

The Righi-Leduc effect in copper at low temperatures

1966 ◽  
Vol 293 (1433) ◽  
pp. 275-289 ◽  
Keyword(s):  
Fermi Surface ◽  
High Field ◽  
High Symmetry ◽  
Lattice Contribution ◽  
Copper Crystal ◽  
Open Orbit ◽  
Resistance Thermometers ◽  
Two Samples ◽  
Electrical Effect ◽  
Extended Zone

The thermal and electrical magnetoresistance tensors are expected to depend in identical ways on the electronic structure of a metal provided that scattering is predominantly elastic. It is shown that the lattice contribution to the thermal conductivity tensor can be neglected in copper at 2°K up to a field of 10 6 G, and that there are experimental reasons which suggest the thermal effect to be more amenable to accurate experimental investigation than the electrical one. The expected details of the electrical Hall effect in and around high symmetry directions are discussed in terms of the extended zone Fermi surface, and it is shown that the high field limits of the Hall coefficient with magnetic field exactly along the high symmetry directions are very simply related to a caliper dimension of the Fermi surface necks. Experimental techniques using carbon resistance thermometers and of making accurately placed thermal contacts to a copper crystal are described, and are followed by the results obtained in two samples, of resistance ratio 1600 an d 7000, in fields up to 40 kG. The open orbit dominated behaviour expected for the electrical effect near the high symmetry directions is satisfactorily confirmed in the thermal experiment, but the high field limits of the coefficients exactly along the symmetry directions do not agree at all well with the calculations, particularly in <111>. It is clearly necessary to measure the electrical and thermal effects in the same sample to check the validity of the Wiedemann-Franz law.

scholarly journals Fermi Surface of AuSb2. I. High-Field Galvanomagnetic Effects

1970 ◽  
Vol 1 (4) ◽  
pp. 1273-1284 ◽  
Author(s):  
J. Ahn ◽  
D. J. Sellmyer
Keyword(s):  
Fermi Surface ◽  
High Field ◽  
Galvanomagnetic Effects

scholarly journals High-field magnetoresistance oscillations in α-[bis(ethylenedithio)tetrathiafulvalene]2KHg(SCN)4: The effects of magnetic breakdown, exchange interactions, and Fermi-surface reordering

1995 ◽  
Vol 51 (13) ◽  
pp. 8325-8336 ◽  
Author(s):  
J. Caulfield ◽  
S. J. Blundell ◽  
M. S. L. du Croo de Jongh ◽  
P. T. J. Hendriks ◽  
J. Singleton ◽  
...  
Keyword(s):  
Fermi Surface ◽  
High Field ◽  
Exchange Interactions ◽  
Magnetic Breakdown ◽  
Magnetoresistance Oscillations

scholarly journals High-Field Fermi Surface Properties in the Low-Carrier Heavy-Fermion Compound URu2Si2

2012 ◽  
Vol 81 (7) ◽  
pp. 074715 ◽  
Author(s):  
Dai Aoki ◽  
Georg Knebel ◽  
Ilya Sheikin ◽  
Elena Hassinger ◽  
Liam Malone ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Surface Properties ◽  
High Field ◽  
Heavy Fermion ◽  
Heavy Fermion Compound

High-Field Galvanomagnetic Properties and Structure of Ni-Mn-Ga Nanocrystalline Alloys with Shape Memory

2010 ◽  
Vol 159 (1-2) ◽  
pp. 249-252 ◽  
Author(s):  
E. B. Marchenkova ◽  
V. V. Marchenkov ◽  
N. I. Kourov ◽  
V. G. Pushin ◽  
A. V. Korolev ◽  
...  
Keyword(s):  
Shape Memory ◽  
High Field ◽  
Nanocrystalline Alloys ◽  
Galvanomagnetic Properties

The open orbits of potassium

1982 ◽  
Vol 60 (5) ◽  
pp. 687-692 ◽  
Author(s):  
A. W. Overhauser
Keyword(s):  
Fermi Surface ◽  
Charge Density Wave ◽  
High Field ◽  
Density Wave ◽  
Intrinsic Property ◽  
Wave Structure ◽  
Theoretical Principle ◽  
Open Orbit ◽  
Multiply Connected ◽  
A Charge

The high-field magnetoresistance of potassium, which fails to saturate, can be an intrinsic property only if the Fermi surface is multiply connected. Direct observation of open-orbit magnetoresistance peaks by Coulter and Datars confirms this theoretical principle. Since the Brillouin zone of potassium is only half full, and the Fermi surface is nearly spherical, open orbits can occur only if the translational symmetry of the crystal is broken by a charge-density-wave structure. The open-orbit distributions that result explain the observed magnetoresistance patterns.

Longitudinal magnetoresistance

1964 ◽  
Vol 282 (1391) ◽  
pp. 464-484 ◽  
Keyword(s):  
Fermi Surface ◽  
High Field ◽  
Isotropic Scattering ◽  
Zero Field ◽  
Detailed Calculation ◽  
Electron Model ◽  
Constant Relaxation Time ◽  
The Difference ◽  
Pass Through ◽  
Longitudinal Magnetoresistance

The longitudinal magnetoresistance is easier to analyse than the transverse magneto­resistance, and it is used here to study how the theoretically predicted behaviour depends on the details of the model chosen. It is found that for a multiply-connected Fermi surface like that of copper there is a large difference according as the scattering is through large or small angles, and that a very small amount of small angle scattering imposed on predomi­nantly isotropic scattering can have a powerful influence in increasing the difference between zero-field and high-field conductivity. The effects discussed arise from those orbits which pass through Brillouin zone boundaries and which in a high field greatly accelerate the relaxation process by connecting opposite sides of the Fermi surface. A detailed calculation is carried out for the longitudinal magnetoresistance of aluminium with the field along a cube axis, and it is found that except in very strong fields the observed behaviour is well accounted for by the nearly-free. electron model and a constant relaxation time.

High Field Magnetoacoustic Investigation of the Fermi Surface of Tungsten

1973 ◽  
Vol 51 (1) ◽  
pp. 77-86 ◽  
Author(s):  
J. P. Kalejs ◽  
J. M. Perz
Keyword(s):  
Magnetic Field ◽  
Fermi Surface ◽  
Empirical Model ◽  
Cyclotron Resonance ◽  
High Field ◽  
Ultrasonic Waves ◽  
Quantum Oscillations ◽  
Resonance Data ◽  
The Magnetic Field ◽  
Longitudinal Ultrasonic Waves

We have measured the frequencies of quantum oscillations in the attenuation of 20 MHz longitudinal ultrasonic waves in tungsten in magnetic fields up to 109 kOe. Our results agree well with the de Haas–van Alphen (dHvA) data of Girvan, Gold, and Phillips (GGP). In addition, we see features predicted by the empirical model developed by GGP but not observed directly in the dHvA studies. Specifically, we find strong evidence of the continuation of the ω branch (GGP notation) for the magnetic field H in the [Formula: see text] plane right to the [110] direction; we also observe splitting of the ξ branch for field directions near [111], but not to the extent predicted by the model. From the temperature dependence of the amplitudes of the quantum oscillations, we have deduced cyclotron masses for some orbits; these agree well with GGP and cyclotron resonance data.

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