On the Magneto Resistance Effect and the Electric Resistance of Single Crystals of Cobalt

Two groups of plastins of single-crystals of silicon doped with boron, were preliminary grown by the method of Chochralsky and thermally treat. Got values of specific electric resistance at different terms realizations of heat treatment served as a weekend by data. On the basis of the obtained experimental data were conducted: analysis of variance of the matrix system, estimation of results on the criterion of Cochren and Student. Built mathematical models. Determination of values of optimal technological parameters allowed objectively, taking into account influence of factors, to educe the maximum-possible circle of values for the receipt of necessary results. For basis accepted the change of temperature of heat treatment and time of self-control. All got experimental job performances are recreated and real at the construction of matrix of planning.

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The thermal conductivity of metals in high magnetic fields at low temperatures

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1953.0099 ◽

1953 ◽

Vol 218 (1133) ◽

pp. 190-205 ◽

Cited By ~ 17

Keyword(s):

Thermal Resistance ◽

Single Crystals ◽

Conductivity Measurements ◽

Thermal Switch ◽

Small Fields ◽

Pure Metals ◽

Saturation Effects ◽

Longitudinal Fields ◽

Transverse Fields ◽

Magneto Resistance

In heat conductivity measurements between 2 and 4·5° K twenty-seven pure metals have been subjected to a magnetic field of 4 kOe. Of these, Cd, Sn, Pb, Zn, Ga, Ag, Tl and In show appreciable magneto-resistance effects. Single crystals of Cd, Sn and Pb were investigated and of Zn and Ga, single crystals of different orientations. Ag, Tl and In were polycrystalline specimens. Transverse and longitudinal fields were applied, the effect being always greater in the transverse case. Single crystals of Zn, Sn, Cd and a specimen of Tl were investigated in transverse fields up to 18·5 kOe. The thermal resistance of the cadmium crystal was increased by a factor of 1000 at 2·3° K, and the use of this effect in a thermal switch has been suggested. In transverse fields the thermal resistance of all metals was found to rise linearly except for very small fields. Indications of saturation effects were only obtained in longitudinal fields. The results have been discussed on the basis of existing theory.

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Vortex structure and anisotropy of electric resistance in Bi2Sr1.65La0.35CuO6 + δ single crystals

Journal of Experimental and Theoretical Physics ◽

10.1134/s1063776114080196 ◽

2014 ◽

Vol 119 (3) ◽

pp. 514-520

Author(s):

L. Ya. Vinnikov ◽

A. G. Yukina ◽

V. N. Zverev ◽

A. D. Shovkun ◽

A. B. Kulakov

Keyword(s):

Single Crystals ◽

Vortex Structure ◽

Electric Resistance

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The transverse magneto-resistance effect in single crystals of iron

Journal of the Franklin Institute ◽

10.1016/s0016-0032(27)91577-4 ◽

1927 ◽

Vol 204 (2) ◽

pp. 238

Author(s):

G.F.S.

Keyword(s):

Single Crystals ◽

Magneto Resistance

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Oscillatory Hall effect in tin due to magnetic breakdown

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1970.0109 ◽

1970 ◽

Vol 317 (1529) ◽

pp. 167-186 ◽

Cited By ~ 9

Keyword(s):

Hall Effect ◽

Single Crystals ◽

Explicit Expression ◽

Central Zone ◽

Angular Variation ◽

Sharp Maximum ◽

Magnetic Breakdown ◽

Magneto Resistance

The Hall effect in single crystals of tin shows oscillations at temperatures below 4.2 K when B lies along, or very near, the [001] axis. The amplitude of the oscillations has a sharp maximum 1° away from the axis and has vanished by 4°. The oscillations are explained in terms of the migration of electrons by magnetic breakdown between the e 5 1 and δ 1 1 orbits, as has already been invoked to account for oscillatory magneto-resistance. To account for the existence of off-axis Hall oscillations when, as is known, breakdown is confined to a fairly narrow central zone, it is found necessary to include collisions of the electrons with impurities even though these are rare enough for ω c т to be as large as 200. The theory is developed in terms of diffusion of electrons on a limited orbit-network, and an explicit expression derived for the angular variation of oscillatory amplitude, which is found to agree well when independent estimates of the relevant parameters are used.

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