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Title: Magnetothermopower of cobalt/copper multilayers with gradient perpendicular to planes

Abstract

The magnetothermopower and magnetoresistance of two copper/cobalt multilayers grown on grooved indium phosphide were measured between 100 K and 295 K. One sample was deposited at an angle onto a grooved substrate such that transport properties are measured between layers rather than parallel to them (CPP); the other was deposited perpendicular to the substrate, so that the transport properties are measured at an angle to the planes (CAP). The data show the magnetothermopower to vary inversely with the resistivity, as predicted by the Mott formula if the magnetoresistance is determined by the ratio {alpha} of majority to minority densities of states at the Fermi energy E{sub F} in the magnetic metal. Using this result, we can collapse the thermopower data at various temperatures to find that {alpha}{sup '}/{alpha} is 0.6 eV{sup -1} for the CPP sample and 0.7 eV{sup -1} for the CAP sample, where {alpha}{sup '}(ident to)({partial_derivative}{alpha}/{partial_derivative}E){sub E{sub F}}. (c) 2000 American Institute of Physics.

Authors:
 [1];  [1];  [2]
  1. University of Illinois, Department of Physics, 1110 W. Green Street, Urbana, Illinois 61801 (United States)
  2. Philips Research Laboratories, Prof. Holstlaan 4, 5656 AA Eindhoven, The Netherlands (Netherlands)
Publication Date:
OSTI Identifier:
20216214
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 87; Journal Issue: 9; Other Information: PBD: 1 May 2000; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COBALT; COPPER; LAYERS; THERMOELECTRIC PROPERTIES; MAGNETORESISTANCE; MAGNETIC MATERIALS; ENERGY-LEVEL DENSITY; EXPERIMENTAL DATA

Citation Formats

Baily, S. A., Salamon, M. B., and Oepts, W. Magnetothermopower of cobalt/copper multilayers with gradient perpendicular to planes. United States: N. p., 2000. Web. doi:10.1063/1.373181.
Baily, S. A., Salamon, M. B., & Oepts, W. Magnetothermopower of cobalt/copper multilayers with gradient perpendicular to planes. United States. doi:10.1063/1.373181.
Baily, S. A., Salamon, M. B., and Oepts, W. Mon . "Magnetothermopower of cobalt/copper multilayers with gradient perpendicular to planes". United States. doi:10.1063/1.373181.
@article{osti_20216214,
title = {Magnetothermopower of cobalt/copper multilayers with gradient perpendicular to planes},
author = {Baily, S. A. and Salamon, M. B. and Oepts, W.},
abstractNote = {The magnetothermopower and magnetoresistance of two copper/cobalt multilayers grown on grooved indium phosphide were measured between 100 K and 295 K. One sample was deposited at an angle onto a grooved substrate such that transport properties are measured between layers rather than parallel to them (CPP); the other was deposited perpendicular to the substrate, so that the transport properties are measured at an angle to the planes (CAP). The data show the magnetothermopower to vary inversely with the resistivity, as predicted by the Mott formula if the magnetoresistance is determined by the ratio {alpha} of majority to minority densities of states at the Fermi energy E{sub F} in the magnetic metal. Using this result, we can collapse the thermopower data at various temperatures to find that {alpha}{sup '}/{alpha} is 0.6 eV{sup -1} for the CPP sample and 0.7 eV{sup -1} for the CAP sample, where {alpha}{sup '}(ident to)({partial_derivative}{alpha}/{partial_derivative}E){sub E{sub F}}. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.373181},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 9,
volume = 87,
place = {United States},
year = {2000},
month = {5}
}