Results 91 to 100 of about 143 (136)

The hydrogenation–disproportionation–desorption–recombination process of Nd2Fe14B studied by in-situ neutron diffraction and thermomagnetic measurements

Journal of Alloys and Compounds, 1997
The hydrogenation-disproportionation-desorption-recombination behaviour of Nd-Fe-B alloys has been studied by in-situ powder neutron diffraction and thermomagnetic measurements performed under hydrogen gas. Decomposition temperatures have been determined in order to obtain partial or complete reactions. Intermediate phases have been observed.
Liesert, Silke, Fruchart, Daniel, de Rango, Patricia, Soubeyroux, Jean-Louis   +3 more
openaire   +2 more sources

Remote measurement of transient heat flux based on the thermomagnetic effect

Measurement Science and Technology
Abstract Heat flux is a physical quantity that characterises the strength of heat transfer per unit area. Heat transfer occurs with a temperature difference. Herein, a remote heat flux measurement method based on the thermomagnetic effect is proposed.
WenTong Yi, XinChao Cui, Zhongzhou Du, Wenzhong Liu   +3 more
openaire   +1 more source

Determination of the thermophysical properties of semiconductors by measuring the superposed galvano- and thermomagnetic effects by the method of variation of action factors

Journal of Engineering Physics, 1979
An analysis is made of the transients of superposed galvano- and thermomagnetic effects (GTME) in semiconductors. Formulas are obtained which permit determination of the thermophysical properties.
I. S. Lisker, M. B. Pevzner
openaire   +1 more source

Study on the variations of geomagnetic-field intensity during the quaternary in special reference to thermomagnetic measurements on volcanic rocks

Geochemistry, 1982
Thermomagnetic measurements have been made on thirteen samples of Quaternary volcanic rocks of different episodes from three localities by Thellier’s method. Paleomagnetic field intensities for the three Quaternary sub-periods have been obtained: 0.62 for Early Pleistocene, 1.01 for Middle Pleistocene and 1.57 for Late Pleistocene with respect to the ...
Junda Wang, Huamei Li, Zisheng An
openaire   +1 more source

Validation of galvanomagnetic and thermomagnetic transport measurements using Standard Reference Material 3451

Review of Scientific Instruments
In the “method of four coefficients,” electrical resistivity (ρ), Seebeck coefficient (S), Hall coefficient (RH), and Nernst coefficient (Q) of a material are measured and typically fit or modeled with theoretical expressions based on Boltzmann transport theory to glean experimental insights into features of electronic structure and/or charge carrier ...
Matt Beekman, Matteo Benedetti, Deja Dominguez, Hayden Hewett-Abbott, Andrew Jarymowycz, Matthew Leibowitz, Travis Nichols, Roger Dorris, Kyle Thomson, Sarah J. Watzman, Thu Gibson, Katherine A. Schlaak   +11 more
openaire   +2 more sources

A dynamic study of domain formation mechanism during thermomagnetic recording based on micro-Hall effect measurements

Journal of Applied Physics, 1996
A method for analyzing the dynamics of domain formation during the thermomagnetic recording process has been developed based on the extraordinary Hall effect. A magnetic domain is written at the center of a cross-shaped magneto-optical sample having an area of 5×5 μm2, and the Hall voltage is monitored during the recording process.
Yung-Chieh Hsieh, S. N. Gadetsky, M. Mansuripur, M. Takahashi   +3 more
openaire   +1 more source

Thermomagnetic Analyses of the Permeability Controlling Minerals in Red and White Sandstones in Deep Tight Gas Reservoirs: Implications for Downhole Measurements

SPE Deep Gas Conference and Exhibition, 2010
Abstract Our recent work on deep tight gas reservoirs containing red and white sandstones (Potter et al., 2009) has shown that the presence of small amounts of hematite in reservoir samples has a dramatic effect on permeability. Such conclusions were made using laboratory based low and high field magnetic susceptibility measurements on ...
Arfan Ali, David K. Potter
openaire   +1 more source

Nitrogen-induced decrease of the electron effective mass in GaAs1−xNx thin films measured by thermomagnetic transport phenomena

Applied Physics Letters, 2003
Thin films of GaAs1−xNx were grown on insulating GaAs substrates and subjected to temperature-dependent resistivity, Hall, Seebeck, and Nernst coefficient measurements. Density of states, effective-mass values, which are calculated from the transport data, decrease from 0.084me to 0.029me as x increases from 0 to 0.004.
D. L. Young, J. F. Geisz, T. J. Coutts
openaire   +1 more source

Measurement of transient temperature during thermomagnetic writing in MO recording media

IEEE Transactions on Magnetics, 1992
Real-time Kerr contrast images produced by a time-resolved microscope were used to derive transient temperature during thermomagnetic (TM) writing. Temperature profiles in magnetooptical films during TM writing were measured, and Curie diameter could be derived.
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Calculating semiconductor parameters based on measuring electrical and thermophysical, galvanic and thermomagnetic effects using the method of varying the influence factors

Journal of Engineering Physics, 1978
The methods and the sequence for calculating the semiconductor parameters using the results of measuring the effects of a single experiment are examined. Algorithms for calculating the primary and secondary semiconductor parameters are proposed.
I. S. Lisker, M. B. Pevzner
openaire   +1 more source