Magneto-Resistance Effect of Ni3Fe Single Crystals

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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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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The magneto-resistance of aluminium

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

10.1098/rspa.1963.0158 ◽

1963 ◽

Vol 275 (1360) ◽

pp. 113-134 ◽

Cited By ~ 45

Keyword(s):

Low Temperature ◽

Magnetic Fields ◽

Plane Wave ◽

Fermi Surface ◽

Single Crystals ◽

Wave Model ◽

Pure Aluminium ◽

Orthogonal Plane ◽

Complete Saturation ◽

Magneto Resistance

Low -temperature measurements of transverse magneto-resistance were made on 24 single crystals of pure aluminium in magnetic fields up to 20 kG. In contrast with the theory, neither complete saturation of magneto-resistance nor quadratic variation with field were observed in any orientation. The anisotropy of themagneto-resistance was small, but showed a pattern consistent with symmetry requirements. These results appear inexplicable on a basis of Harrison’s four orthogonal plane wave model of the aluminium Fermi surface, but can be explained qualitatively in terms of a slightly different Fermi surface which touches the corners of the second Brillouin zone. This model is not inconsistent with other experimental results.

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The transverse magneto-resistance effect in single crystals of iron

Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character ◽

10.1098/rspa.1927.0063 ◽

1927 ◽

Vol 114 (768) ◽

pp. 611-619 ◽

Cited By ~ 14

Keyword(s):

Magnetic Field ◽

Crystal Structure ◽

Single Crystals ◽

Longitudinal Magnetic Field ◽

Transverse Magnetic ◽

Longitudinal Component ◽

Initial Increase ◽

Direct Influence ◽

Magneto Resistance ◽

The Magnetic Field

The experiments to be described in this paper, deal with the change of resistance of single crystals of iron caused by a magnetic field perpendicular to the direction of the current. In two earlier papers, it has been shown that both the phenomena of magneto-striction and change of resistance in a longitudinal magnetic field were very different when measured in different directions in the crystal. And the results led to the conclusion that the change of resistance in the latter case was due to the change of orientation of the atoms accompanying magnetization, any direct influence of the field on the resistance being negligible. With these results in mind it seemed important to determine how the change of resistance in a transverse magnetic field depended on the crystal structure, and whether this more complicated effect, dealing with two directions in the crystal instead of one, would fit in with the results previously obtained. Many measurements of this phenomenon have been made for soft iron, and it has generally been accepted that there is only a decrease of resistance, slow at first, then rapid, finally approaching a saturation value. Occasionally an initial increase has been found, but this has not been considered genuine, being accounted for by the presence of a longitudinal component of magnetization due to imperfect orientation of the rod in the magnetic field.

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Magneto-resistance study on single crystals of NbAs2 semimetal

10.1063/1.5113269 ◽

2019 ◽

Author(s):

V. Harimohan ◽

A. Bharathi ◽

P. D. Babu ◽

R. Rajaraman ◽

C. S. Sundar

Keyword(s):

Single Crystals ◽

Magneto Resistance

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On the magneto-resistance effect in single crystals of cadmium

Mathematical Proceedings of the Cambridge Philosophical Society ◽

10.1017/s0305004100016881 ◽

1937 ◽

Vol 33 (1) ◽

pp. 145-153 ◽

Cited By ~ 1

Author(s):

C. J. Milner

Keyword(s):

Magnetic Field ◽

Magnetic Fields ◽

Single Crystal ◽

Crystal Lattice ◽

Single Crystals ◽

Liquid Nitrogen ◽

Critical Field ◽

High Magnetic Fields ◽

Linear Effect ◽

Magneto Resistance

A method of growing single-crystal resistance specimens free, to a large extent, from strains and impurities is described. The magneto-resistance effect in cadmium single crystals has been studied in some detail at the temperature of liquid nitrogen, using sufficiently high magnetic fields to observe the linear effect found by Kapitza.Although it proved impossible, in general, to determine the orientation of individual crystals, the experiments suggest that the “critical field” of the linear effect is dependent on the orientation of the crystal with respect to the current and magnetic field, and not on the perfection of the crystal lattice.

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