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Title: Optimized fabrication and characterization of carbon nanotube spin valves

We report an improved fabrication scheme for carbon based nanospintronic devices and demonstrate the necessity for a careful data analysis to investigate the fundamental physical mechanisms leading to magnetoresistance. The processing with a low-density polymer and an optimised recipe allows us to improve the electrical, magnetic, and structural quality of ferromagnetic Permalloy contacts on lateral carbon nanotube (CNT) quantum dot spin valve devices, with comparable results for thermal and sputter deposition of the material. We show that spintronic nanostructures require an extended data analysis, since the magnetization can affect all characteristic parameters of the conductance features and lead to seemingly anomalous spin transport. In addition, we report measurements on CNT quantum dot spin valves that seem not to be compatible with the orthodox theories for spin transport in such structures.
Authors:
; ; ; ;  [1]
  1. Institute of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel (Switzerland)
Publication Date:
OSTI Identifier:
22273459
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; CARBON NANOTUBES; COMPARATIVE EVALUATIONS; DATA ANALYSIS; DEPOSITION; FABRICATION; MAGNETIZATION; MAGNETORESISTANCE; POLYMERS; QUANTUM DOTS; SPIN; SPUTTERING; VALVES