Effect of grain size of sputtered cerium‐oxide films on their electrical and kinetic behavior at high temperatures

1994 ◽  
Vol 75 (8) ◽  
pp. 3991-3999 ◽  
Author(s):  
Werner Lohwasser ◽  
Josef Gerblinger ◽  
Uwe Lampe ◽  
Hans Meixner
2018 ◽  
Vol 319 ◽  
pp. 61-67 ◽  
Author(s):  
Silja Schmidtchen ◽  
Holger Fritze ◽  
Sean Bishop ◽  
Di Chen ◽  
Harry L. Tuller

2018 ◽  
Vol 112 (21) ◽  
pp. 213502 ◽  
Author(s):  
Sebastian Schröder ◽  
Holger Fritze ◽  
Sean Bishop ◽  
Di Chen ◽  
Harry L. Tuller

Experiments show that during repeated sliding, oxide is included to a considerable depth beneath the surface of the metal. Subsequent annealing at high temperatures shows that the included oxide particles prevent grain growth in the surface layers. This process may be largely responsible for the fine grain size of the Beilby layer.


1995 ◽  
Vol 403 ◽  
Author(s):  
D. V. Dimitrov ◽  
A. S. Murthy ◽  
G. C. Hadjipanayis ◽  
C. P. SWANN

AbstractFe-O and Co-O films were prepared by DC magnetron sputtering in a mixture of Ar and O2 gases. By varying the oxygen to argon ratio, oxide films with stoichiometry FeO, Fe3O4, α-Fe2O3, CoO and Co3O4 were produced. TEM studies showed that the Fe – oxide films were polycrystalline consisting of small almost spherical grains, about 10 nm in size. Co-O films had different microstructure with grain size and shape dependent on the amount of oxygen. X-ray diffraction studies showed that the grains in Fe-O films were randomly oriented in contrast to Co-O films in which a <111> texture was observed. Pure FeO and α-Fe2O3 films were found to be superparamagnetic at room temperature but strongly ferromagnetic at low temperatures in contrast to the antiferromagnetic nature of bulk samples. A very large shift in the hysteresis loop, about 3800 Oe, was observed in field cooled Co-CoO films indicating the presence of a large unidirectional exchange anisotropy.


2013 ◽  
Vol 8 (1) ◽  
Author(s):  
Chun Zhao ◽  
Ce Zhou Zhao ◽  
Matthew Werner ◽  
Steve Taylor ◽  
Paul Chalker ◽  
...  

2015 ◽  
Vol 17 (4) ◽  
pp. 2770-2777 ◽  
Author(s):  
Nataliya Tsud ◽  
Sofiia Bercha ◽  
Robert G. Acres ◽  
Mykhailo Vorokhta ◽  
Ivan Khalakhan ◽  
...  

The surfaces of cerium oxide films were modified by histidine adsorption in vacuum. It was shown that the morphology and structure of the oxide are decisive factors which define the adsorption geometry of the histidine adlayer.


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