On the thermoelectric magnetic field of spherical and cylindrical inclusions

Autor:	Adnan H. Nayfeh, Peter B. Nagy
Rok vydání:	2000
Předmět:	Physics Magnetic signal Condensed matter physics Magnetometer Physics::Medical Physics Theoretical models General Physics and Astronomy Polarization (waves) law.invention Magnetic field law Condensed Matter::Superconductivity Thermoelectric effect Thermal Excitation
Zdroj:	Journal of Applied Physics. 87:7481-7490
ISSN:	1089-7550 0021-8979
Popis:	It was recently discovered that inclusions and other types of inhomogeneities can be nondestructively detected by thermoelectric measurements in an entirely noncontact way by using high-sensitivity superconducting quantum interference device magnetometers to sense the weak thermoelectric currents around the affected region when the specimen is subjected to directional heating or cooling. In this article we present theoretical models capable of predicting the magnetic field produced by thermoelectric currents around spherical and cylindrical inclusions under external thermal excitation. We investigated how the magnetic signal to be detected depends on (i) the relevant physical properties of the host and the inclusion, (ii) the size of the inclusion, (iii) the depth of the inclusion below the surface of the specimen, (iv) the polarization of the magnetometer, (v) the lift-off distance of the magnetometer from the specimen, and the (vi) direction and (vii) strength of the external heating or cooling applied ...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1f35d4349dfcc9edb179670009e68840 https://doi.org/10.1063/1.373013 Zobrazit plný text záznamu