Excess Noise in Semiconductors

This citation is provided as a resource for researchers, but Contrails cannot provide a full-text download

U.S. government employees, Military/Department of Defense employees, and U.S. government contractors and sub-contractors may be eligible to register with the Defense Technical Information Center (DTIC), where this report and others like it may be available
Author(s): Brophy, James J.
Corporate Author(s): Armour Research Foundation
Date of Publication: 1962-11-14
Pages: 1
Contract: Nonr-180000
DoD Project: NR 017-432
DoD Task:
Identifier: AD0288874
AD Number: AD-288 874

Critical point polarization fluctuations in ferroelectric triglycene sulfate crystals were measured at the curie temperature by observing noise voltages between electrodes applied to the crystal. In barium titanate crystals a thermal Barkhausen noise with a 1/f power spectrum is observed when the crystal temperature is passed slowly through the curie point. Experimentally it was found that the noise voltage appearing across a metallic conductor heated to high temperatures by dc current flow is given by the Nyquist theorem, even though the conductor is not in thermodynamic equilibrium. In semiconductors fluctuations in optical absorption at wavelengths beyond the fundamental absorption edge caused by free carrier scattering are expected. A simple experiment employing an infrared interferometer was capable of detecting such fluctuations in optical absorption

Other options for obtaining this report:

Via the Defense Technical Information Center (DTIC):
A record for this report, and possibly a pdf download of the report, exists at DTIC

Via National Technical Report Library:
This report may be available for download from NTRL. Use the Title from this record to locate the item in DTIC Online

Indications of Public Availability
No digital image of an index entry indicating public availability is currently available
There has been no verification of an indication of public availability from an inside cover statement