Sputter deposition of oriented Y-Ba-Cu-O thin films and study of grain boundary Josephson junctions

It is well known that a number of compound superconductors with the A15 structure undergo a martensite transformation when cooled to the superconducting state. Nb3Sn is one of those compounds that transforms, at least partially, from a cubic to tetragonal structure near 43 K. To our knowledge this transformation in Nb3Sn has not been studied by TEM. In fact, the only low temperature TEM study of an A15 material, V3Si, was performed by Goringe and Valdre over 20 years ago. They found the martensite structure in some foil areas at temperatures between 11 and 29 K, accompanied by faults that consisted of coherent twin boundaries on {110} planes. In pursuing our studies of irradiation defects in superconductors, we are the first to observe by TEM a similar martensite structure in Nb3Sn.Samples of Nb3Sn suitable for TEM studies have been produced by both a liquid solute diffusion reaction and by sputter deposition of thin films.

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Sputter Deposited Metal Layers Embedded in Composites—From Fundamentals to Applications

Coatings ◽

10.3390/coatings11020190 ◽

2021 ◽

Vol 11 (2) ◽

pp. 190

Author(s):

Florian Cougnon ◽

Mathias Kersemans ◽

Wim Van Paepegem ◽

Diederik Depla

Keyword(s):

Thin Films ◽

Heat Flux ◽

Sputter Deposition ◽

Image Correlation ◽

Fiber Reinforced Polymers ◽

Thermal Probe ◽

Reinforced Polymers ◽

Magnetron Sputter Deposition ◽

Sputter Deposited ◽

Metal Layers

Due to the low heat flux towards the substrate, magnetron sputter deposition offers the possibility to deposit thin films on heat sensitive materials such as fiber-reinforced polymers, also known as composite materials. Passive thermal probe measurements during the sputter deposition of metal layers show indeed that the temperature increase remains well below 25 °C for film thicknesses up to 600 nm. The latter thickness threshold is based on the influence of embedded metal films on the adhesion of the composite plies. Films thicker than this threshold deteriorate the mechanical integrity of the composite. The introduction of the uncured composite in the vacuum chamber strongly affects the base pressure by outgassing of impurities from the composite. The impurities affect the film properties as illustrated by their impact on the Seebeck coefficient of sputter deposited thermocouples. The restrictions to embed thin films in composites, as illustrated by both the heat flux measurements, and the study on the influence of impurities, are however not insurmountable. The possibility to use embedded thin films will be briefly demonstrated in different applications such as digital volume image correlation, thermocouples, and de-icing.

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Influence of reactive sputter deposition conditions on crystallization of zirconium oxide thin films

Journal of Vacuum Science & Technology A Vacuum Surfaces and Films ◽

10.1116/1.3119669 ◽

2009 ◽

Vol 27 (3) ◽

pp. 577-583 ◽

Cited By ~ 15

Author(s):

Guneet Sethi ◽

Paul Sunal ◽

Mark W. Horn ◽

Michael T. Lanagan

Keyword(s):

Thin Films ◽

Zirconium Oxide ◽

Sputter Deposition ◽

Oxide Thin Films ◽

Reactive Sputter Deposition ◽

Deposition Conditions

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Correlation of grain boundary nature with magnetization in RF-sputtered lithium–zinc ferrite thin films

Journal of Magnetism and Magnetic Materials ◽

10.1016/j.jmmm.2009.05.073 ◽

2009 ◽

Vol 321 (20) ◽

pp. 3373-3379 ◽

Cited By ~ 5

Author(s):

Lakshmikanta Aditya ◽

J. Nanda ◽

I. Samajdar ◽

N. Venkataramani ◽

Shiva Prasad

Keyword(s):

Thin Films ◽

Grain Boundary ◽

Zinc Ferrite ◽

Ferrite Thin Films

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Effect of the nature of the working gas on the d.c. magnetron sputter deposition of chromium nitride and oxi-nitride thin films on steel substrates

Surface and Coatings Technology ◽

10.1016/0257-8972(95)02709-2 ◽

1996 ◽

Vol 80 (1-2) ◽

pp. 190-194 ◽

Cited By ~ 8

Author(s):

J. Baborowski ◽

M. Charbonnier ◽

M. Romand

Keyword(s):

Thin Films ◽

Sputter Deposition ◽

Chromium Nitride ◽

Magnetron Sputter Deposition ◽

Magnetron Sputter ◽

Steel Substrates

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A HYBRID MODEL ON HYSTERESIS LOOP AND COERCIVITY IN NANOSTRUCTURED PERMANENT MAGNETS

International Journal of Nanoscience ◽

10.1142/s0219581x06004899 ◽

2006 ◽

Vol 05 (04n05) ◽

pp. 627-631 ◽

Cited By ~ 1

Author(s):

M. J. SUN ◽

G. P. ZHAO ◽

J. LIANG ◽

G. ZHOU ◽

H. S. LIM ◽

...

Keyword(s):

Thin Films ◽

Domain Wall ◽

Grain Boundary ◽

Magnetic Moment ◽

Permanent Magnets ◽

Hysteresis Loops ◽

Bulk Materials ◽

Rotational Model ◽

Moment Distribution ◽

Coercivity Mechanism

A simplified micromagnetic model has been proposed to calculate the hysteresis loops of nanostructured permanent magnets for various configurations, including thin films, exchange-coupled double-layer systems and bulk materials. The reversal part of the hysteresis is based on the Stoner–Wohlfarth coherent rotational model and the coercivity mechanism is due mainly to the motion of the transition region (a domain wall like magnetic moment distribution in the grain boundary). The elements of nucleation and pinning models are also incorporated.

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