High Field Magnetoresistance and Quantum Oscillations in Iron Whiskers

1975 ◽  
Vol 53 (3) ◽  
pp. 284-298 ◽  
Author(s):  
M. A. Angadi ◽  
E. Fawcett ◽  
Mark Rasolt
Keyword(s):  
Fermi Surface ◽  
High Field ◽  
Quantum Oscillations ◽  
Hole Pocket ◽  
Strain Dependence ◽  
Magnetic Breakdown ◽  
Minority Spin ◽  
Iron Whiskers ◽  
Lower Frequencies

[100] and [111] iron whiskers were measured to determine the origin of open orbits responsible for anisotropy of the high field magnetoresistance. The marked strain dependence of the minima resulting from [Formula: see text] open orbits permits their unambiguous identification as resulting from magnetic breakdown at a symmetry degeneracy, de Haas–Shubnikov oscillations were observed, and complementary de Haas–van Alphen measurements showed the lower frequencies (in the range 1.2–1.5 MG) to correspond to a hole pocket of the minority spin Fermi surface.

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

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.

Magnetoacoustic oscillations and the stress dependence of the Fermi surface of tungsten

1976 ◽  
Vol 54 (12) ◽  
pp. 1234-1239 ◽  
Author(s):  
D. J. Stanley ◽  
J. M. Perz ◽  
H. -P. Au
Keyword(s):  
Fermi Surface ◽  
Elastic Constant ◽  
Single Crystal ◽  
Cross Sections ◽  
Single Crystal Sample ◽  
Stress Dependence ◽  
Crystal Sample ◽  
Quantum Oscillations ◽  
Strain Dependence ◽  
First Time

The absolute amplitudes of quantum oscillations in magnetostriction and the elastic constant, c11, have been measured simultaneously, for the first time, in a single crystal sample of tungsten. They are combined to give the strain dependence of the Fermi surface cross sections normal to [100] of the ball and ellipsoid surfaces. Comparison with values measured in another type of uniaxial experiment and with pressure derivatives indicates that the results are consistent, and that the method is feasible, although less convenient than other possible measurements giving the same information.

scholarly journals Fermi surface of the skutterudite CoSb3 : Quantum oscillations and band-structure calculations

2021 ◽  
Vol 103 (8) ◽  
Author(s):  
M. Naumann ◽  
P. Mokhtari ◽  
Z. Medvecka ◽  
F. Arnold ◽  
M. Pillaca ◽  
...  
Keyword(s):  
Band Structure ◽  
Fermi Surface ◽  
Quantum Oscillations ◽  
Band Structure Calculations ◽  
Structure Calculations

THE STUDY OF THE MAGNETIC BREAKDOWN EFFECT AS A FUNCTION OF ANGLE IN THE ORGANIC CONDUCTOR K- (BEDT-TTF)2Cu(NCS)2 IN HIGH MAGNETIC FIELDS

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3355-3359
Author(s):  
I. MIHUT ◽  
C. C. AGOSTA ◽  
C. H. MIELKE ◽  
M. TOKOMOTO
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Spin Splitting ◽  
High Magnetic Fields ◽  
Organic Conductor ◽  
Cross Sectional ◽  
Tank Circuit ◽  
Quantum Oscillations ◽  
Magnetic Breakdown ◽  
Splitting Factor

The magnetic breakdown effect can be seen by the growth of new frequencies in the quantum oscillations in clean metals as a function of magnetic field. We have studied the variation of the amplitudes in the quantum oscillations in the resistance (the Shubnikov-de Haas effect) as a function of angle in the quasi-two dimensional-organic conductor κ-(BEDT-TTF)2Cu(NCS)2. The measurements were made by means of a radio frequency (rf) tank circuit (~ 50 MHz) at very high magnetic fields(50T-60T) and low temperature(500 mK). The geometry of the rf excitation we used excited in-plane currents, and therefore we measured the in-plane resistivity. In contrast to conventional transport measurements that measure the inter-plane resistivity, the in-plane resistivity is dominated by the magnetic breakdown frequencies. As a result we measured much higher breakdown frequency amplitudes than conventional transport experiments. As is expected, the angular dependence of the Shubnikov-de Haas frequencies have a 1/cosθ behavior. This is due to the change of the cross sectional area of the tubular Fermi surface as the angle with respect to the magnetic field is changed. The amplitude of the oscillations changes due to the spin splitting factor which takes into account the ratio between the spin splitting and the energy spacing of the Landau levels which also has 1/cosθ behavior. We show that our data agree with the semi-classical theory (Lifshitz-Kosevich formula).

Quantum oscillations and the Fermi surface of high-temperature cuprate superconductors

2011 ◽  
Vol 12 (5-6) ◽  
pp. 446-460 ◽  
Author(s):  
Baptiste Vignolle ◽  
David Vignolles ◽  
David LeBoeuf ◽  
Stéphane Lepault ◽  
Brad Ramshaw ◽  
...  
Keyword(s):  
High Temperature ◽  
Fermi Surface ◽  
Cuprate Superconductors ◽  
Quantum Oscillations

scholarly journals Quantum oscillations, magnetic breakdown and thermal Hall effect in Co3Sn2S2

2021 ◽  
Author(s):  
Linchao Ding ◽  
Jahyun Koo ◽  
Changjiang Yi ◽  
Liangcai Xu ◽  
Huakun Zuo ◽  
...  
Keyword(s):  
Hall Effect ◽  
Quantum Oscillations ◽  
Magnetic Breakdown
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