Published 2009 | Version v1
Journal article Metadata-only

Direct measurement of the spin polarization of Co-Fe and Co-Fe-B

Creators

  • 1. Universitaet Bielefeld (Germany)
  • 2. MIT, Cambridge (United Kingdom)

Description

We investigated the spin polarization of Co-Fe and Co-Fe-B thin films with the Meservey-Tedrow method. Superconductor/insulator/ferromagnet (S/I/F) structures were fabricated using shadow masks and DC- and RF-magnetron sputtering in an automatic sputtering system. The samples have been post annealed in a vacuum furnace. The superconducting electrode consists of Al95Si5 while the insulator is MgO. For optimization of the superconducting tunnel junctions the properties of the Al-Si films on MgO buffer layers have been investigated in dependence of the Al-Si thickness and the annealing temperature. The dI/dV measurements were done in a 3He cryostat at a temperature of 0.46 K with magnetic fields applied in the range of 2 T to 2.8 T. Finally, the results were compared with conventional MgO magnetic tunnel junctions with Co-Fe and Co-Fe-B electrodes.

Additional details

Identifiers

URL
http://www.dpg-verhandlungen.de;

Publishing Information

Journal Title
Verhandlungen der Deutschen Physikalischen Gesellschaft
Journal Issue
Dresden 2009 issue
Series
Also available as printed version: Verhandlungen der Deutschen Physikalischen Gesellschaft v. 44(5)
Journal Page Range
[1 p.]
ISSN
0420-0195
CODEN
VDPEAZ

Conference

Title
DPG Spring meeting 2009 of the condensed matter section with the divisions biological physics, chemical and polymer physics, dielectric solids, dynamics and statistical physics, low temperature physics, magnetism, metal and material physics, semiconductor physics, surface science, thin films, vacuum science and technology as well as the working groups industry and business, physics of socio-economic systems
Dates
22-27 Mar 2009
Place
Dresden (Germany)

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
41041457
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ALUMINIUM BASE ALLOYS; ANNEALING; BINARY ALLOY SYSTEMS; BORON ALLOYS; COBALT ALLOYS; DEPOSITION; DIELECTRIC MATERIALS; ELECTRIC CONDUCTIVITY; ELECTRODES; FABRICATION; FERROMAGNETIC MATERIALS; IRON ALLOYS; LAYERS; MAGNESIUM OXIDES; MAGNETIC FIELDS; OPTIMIZATION; POLARIZATION-ASYMMETRY RATIO; SILICON ADDITIONS; SPIN ORIENTATION; SPUTTERING; SUPERCONDUCTING JUNCTIONS; SUPERCONDUCTORS; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0000-0013 K; TERNARY ALLOY SYSTEMS; THICKNESS; THIN FILMS; TUNNEL EFFECT
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; ALLOY SYSTEMS; ALLOYS; ALUMINIUM ALLOYS; CHALCOGENIDES; DIMENSIONLESS NUMBERS; DIMENSIONS; ELECTRICAL PROPERTIES; FILMS; HEAT TREATMENTS; MAGNESIUM COMPOUNDS; MAGNETIC MATERIALS; MATERIALS; ORIENTATION; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SILICON ALLOYS; TEMPERATURE RANGE; TRANSITION ELEMENT ALLOYS

Optional Information

Notes
Session: MA 40.97 Fr 11:00; No further information available