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Julius Klerrer

Bio: Julius Klerrer is an academic researcher. The author has contributed to research in topics: Thin film & Layer by layer. The author has an hindex of 1, co-authored 1 publications receiving 2180 citations.

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01 Jan 1969

2,189 citations


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Journal ArticleDOI
T. R. McGuire1, R. Potter1
TL;DR: In this paper, the anisotropic magnetoresistance effect in 3D transition metals and alloys is reviewed, which depends on the orientation of the magnetization with respect to the electric current direction in the material.
Abstract: The anisotropic magnetoresistance effect in 3d transition metals and alloys is reviewed. This effect, found in ferromagnets, depends on the orientation of the magnetization with respect to the electric current direction in the material. At room temperature, the anisotropic resistance in alloys of Ni-Fe and Ni-Co can be greater than 5%. The theoretical basis takes into account spin orbit coupling and d band splitting. Other properties such as permeability, magnetostriction, and Hall voltage have no simple relationship to magnetoresistance. Anisotropic magnetoresistance has an important use as a magnetic field detector for digital recording and magnetic bubbles. Such detectors because of their small size are fabricated using thin film technology. Film studies show that thickness, grain size, and deposition parameters play a significant role in determining the percentage change in magnetoresistance. In general, the change is smaller in films than bulk materials. Several tables and graphs that list bulk and film data are presented.

1,581 citations

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TL;DR: Carbon fibres have been prepared by pyrolysing a mixture of benzene and hydrogen at about 1100°C and have been studied by high resolution electron microscopy.

1,540 citations

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TL;DR: In a recent paper as mentioned in this paper, a general theory of surface stress was presented and several simple solutions within this theory were discussed, e.g., a simple solution to the problem of surface compression.

1,321 citations

Journal ArticleDOI
TL;DR: In the presence of a nickel catalyst, acetylene decomposed to form carbonaceous solids with filamentary, amorphous, or laminar form as discussed by the authors, and parameters controlling the type of deposit have been established.

1,142 citations

Journal ArticleDOI
TL;DR: Thin film solar cells are a promising approach for terrestrial and space photovoltaics and offer a wide variety of choices in terms of the device design and fabrication, but it would surely be determined by the simplicity of manufacturability and the cost per reliable watt.
Abstract: Thin film solar cells (TFSC) are a promising approach for terrestrial and space photovoltaics and offer a wide variety of choices in terms of the device design and fabrication. A variety of substrates (flexible or rigid, metal or insulator) can be used for deposition of different layers (contact, buffer, absorber, reflector, etc.) using different techniques (PVD, CVD, ECD, plasma-based, hybrid, etc.). Such versatility allows tailoring and engineering of the layers in order to improve device performance. For large-area devices required for realistic applications, thin-film device fabrication becomes complex and requires proper control over the entire process sequence. Proper understanding of thin-film deposition processes can help in achieving high-efficiency devices over large areas, as has been demonstrated commercially for different cells. Research and development in new, exotic and simple materials and devices, and innovative, but simple manufacturing processes need to be pursued in a focussed manner. Which cell(s) and which technologies will ultimately succeed commercially continue to be anybody's guess, but it would surely be determined by the simplicity of manufacturability and the cost per reliable watt. Cheap and moderately efficient TFSC are expected to receive a due commercial place under the sun.

1,133 citations