Faraday Effect in Germanium at Room Temperature

Rau, Richard; Caspari, M. E.

doi:10.1103/physrev.100.632

Cited by 115 publications

(16 citation statements)

References 12 publications

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“…The derivation of the classical and quantum mechanical equations for Faraday rotation is given in several papers (Rau and Caspari 1955, Von Kimmel 1957, Mansfield 1967, Shimura et a1 1970, Poehler and Wang 1972. Donovan and Medcalf (1964) have shown that the free-carrier Faraday rotation including multiple internal reflection correction is given by and…”

Section: Theorymentioning

confidence: 99%

Characteristics of a Long Ionization Chamber, and Anomalous Responses near the Guard Tube

Tamura¹,

Kanamori²,

Furuta³

1964

Jpn. J. Appl. Phys.

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Low-temperature electron-impurity scattering times have been measured in ntype InSb samples with different electron densities from Faraday rotation by using a pulsed 0.337 mm HCN laser. The electron-impurity scattering times obtained from the experimental results using a curve-fitting method yielded values of 3 to 4 X S at liquid helium temperatures for three different samples. These scattering times were in sharp contrast to the field dependent DC scattering times calculated from DC mobility measurements at 4.2 K in zero magnetic field. However, there was good agreement between the impurity scatterink times observed from the Faraday rotation measurements and those derived from the cyclotron resonance linewidth measurements at 4.2 K. Possible explanations of the experimental results were also considered.

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Section: Theorymentioning

confidence: 99%

Characteristics of a Long Ionization Chamber, and Anomalous Responses near the Guard Tube

Tamura¹,

Kanamori²,

Furuta³

1964

Jpn. J. Appl. Phys.

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“…The microwave Hall effect was first observed by Cooke,1 who used it to determine the carrier mobility in semiconductors. Several workers developed this technique further by using a circular bimodal cavity 2–6. This technique is useful for measurement of the carrier mobility of bulk semiconductors, organic semiconductors,7 powdered materials,8 perovskites,9 fine magnetic materials,10 pyrite crystals,11 and heterostructures 12.…”

Section: Introductionmentioning

confidence: 99%

Microwave hall mobility studies on polymer–metal oxide nanocomposites

Murthy

Subramanian

Kumar

et al. 2007

J of Applied Polymer Sci

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Films of polymer metal oxide composites with poly(methyl methacrylate) and metallic powders (CuO, Ni, and brushed Fe 3 O 4 ) were prepared with a spin-casting method. Electric transport studies indicated that the compositions surpassed the percolation threshold limit. Alternating current (AC) conductivity studies confirmed a hopping mechanism with power-law behavior in frequency. For the first time, the mobility values of the carriers in these films were measured by the contactless microwave Hall effect technique with a bimodal cavity operating at 14 GHz. In this technique, a circular bimodal cavity is used to measure the change in the transmission coefficient (proportional to the carrier mobility) due to the application of a static magnetic field perpendicular to the microwave electric fields. The mobility measurements indicated a decrease in mobility with increasing quantity of CuO and Ni and showed an increase in the carrier-lattice scattering, whereas the mobility increased with increasing Fe 3 O 4 due to the negative magneto resistance.

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“…The rotation produced depends on the magnitude of the magnetic field and on the direction of propagation of the microwaves in the semiconducting crystal. Rau and Caspari (1955) measured the Faraday rotation in an n-type germanium sample of resistivity 16 Cl cm at room temperature and 8.74 GHz, with the magnetic field of 0.14 T applied in the [110] direction. Furdyna and Broersma (1960) measured the rotation at 78 OK and 35 GHz in germanium samples of resistivity about 5 Cl cm and 1 Cl cm.…”

Section: Introductionmentioning

confidence: 99%

Action of laser radiation on mucous lining of the stomach

Bocharov¹,

Быкова²,

Zubarev³

et al. 1975

Sov. J. Quantum Electron.

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Faraday rotation measurements have been performed at room temperature on antimony-doped n-type single crystals of germanium, cut in the (110) plane, with a magnetic field up to 0.9 T applied in the [110] direction, and with the direction of polarization parallel to the [ l i l ] direction using 9.0 GHz radiation. Rotation is measured on samples with resistivities from 10 R cm to 0.5 0 cm, and is found to increase linearly with the magnetic field up to about 0.7 T. These rotation measurements are compared with the theory developed by Donovan and Webster in the early 1960's for anisotropic semiconductors. The agreement between the measured and calculated values of the Faraday rotation is quite good for the sample with resistivity of about 9 R cm, but in the case of other higher conductivity samples, the measured Faraday rotation is found to be much smaller than the calculated values. The probable causes for this discrepancy are mentioned briefly.

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Faraday Effect in Germanium at Room Temperature

Cited by 115 publications

References 12 publications

Characteristics of a Long Ionization Chamber, and Anomalous Responses near the Guard Tube

Characteristics of a Long Ionization Chamber, and Anomalous Responses near the Guard Tube

Microwave hall mobility studies on polymer–metal oxide nanocomposites

Action of laser radiation on mucous lining of the stomach

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