Document Detail


Analytical investigations of tunnel magnetoresistance layers.
MedLine Citation:
PMID:  15085318     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The basic elements of tunnel magnetoresists are two magnetic layers separated by an insulating barrier layer. The uniformity of this only 1-2 nm thick barrier layer up to dot edges and the chemical composition of the layers are properties important for the efficiency of tunnel magnetoresistance devices. These key-properties have been investigated by analytical TEM methods like high resolution TEM imaging and energy-filtered imaging. With regard to the chemical composition the TEM results have been confirmed by XPS investigations. The subsequent oxidation of the barrier is one of the most critical steps of the deposition procedure of the layer stacks. An undersized oxygen dose leads to an incomplete oxidation of the barrier layer with uncontrollable tunnel behaviour. An overdose of oxygen leads to oxygen diffusion in the layers beneath the barrier and uncontrollable magnetic hardness of the lower magnetic electrode.
Authors:
Jürgen Thomas; Rainer Reiche; Hartmut Vinzelberg
Related Documents :
20206448 - Nanoscale dielectric properties of insulating thin films: from single point measurement...
20973578 - Prospects for resolving chemical structure by atomic force microscopy: a first-principl...
19162398 - A high-speed area detector for novel imaging techniques in a scanning transmission elec...
18033528 - Nondestructive spatial heterodyne imaging of cold atoms.
23314598 - Real-time x-ray-based 4d image guidance of minimally invasive interventions.
3600518 - Geometrical properties of a digital beam attenuator system.
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2004-04-14
Journal Detail:
Title:  Analytical and bioanalytical chemistry     Volume:  379     ISSN:  1618-2642     ISO Abbreviation:  Anal Bioanal Chem     Publication Date:  2004 Jun 
Date Detail:
Created Date:  2004-06-28     Completed Date:  2005-05-16     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  101134327     Medline TA:  Anal Bioanal Chem     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  576-81     Citation Subset:  IM    
Affiliation:
Leibniz-Institut für Festkörper- und Werkstoffforschung, PF 27 01 16, 01171 Dresden, Germany. j.thomas@ifw-dresden.de
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Alloys / chemistry
Aluminum Oxide / chemistry
Cobalt / chemistry
Electrodes
Magnetics / instrumentation*
Materials Testing
Microscopy, Electron, Transmission / methods
Oxidation-Reduction
Oxygen / chemistry
Spectrometry, X-Ray Emission / methods
Surface Properties
Chemical
Reg. No./Substance:
0/Alloys; 1344-28-1/Aluminum Oxide; 7440-48-4/Cobalt; 7782-44-7/Oxygen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Multiresidue method using SPME for the determination of various pesticides with different volatility...
Next Document:  Detection method for microchip separations.