摘要:

The discovery of the Gunn Effect has been heralded as the greatest breakthrough in semiconductor physics since the discovery in 1948 of transistor action in germanium. This article shows the basic physics of the effect and lays emphasis on the physics and applications of devices in which there is a bulk negative differential conductivity. Exciting new possibilities are opened up in the microwave region by a range of devices based on the peculiar properties of high field domains in semiconductors like GaAs.

ISSN:0010-7514    

DOI:10.1080/00107517008204806

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

Switching and memory phenomena in semiconducting glasses, thin films and the variable threshold metal-oxide-nitride-semiconductor MNOS transistor are discussed in light of the available data. Potcntial device applications of these phenomena are analysed, and it is concluded that the variable-threshold transistor appears to be the most commercially attractive and versatile of these devices.

ISSN:0010-7514    

DOI:10.1080/00107517008204807

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

This review is written for readers who are not familiar with fibrous polymers, and it is hoped that it will make an interesting introduction to the subject, which the younger readers will be able to follow completely. It is mainly concerned with the molecular structure and physical properties of fibres and includes a number of examples of the relations between them.

ISSN:0010-7514    

DOI:10.1080/00107517008204808

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

In this short communication the Trouton-Noble experiment is considered first in the classical ether theory. Going over to the special theory of relativity, one encounters some difficulties in describing the null result. A simple explanation of this result is given in terms of the principle of virtual work, introduced recently in this context by J. H. Fremlin.

ISSN:0010-7514    

DOI:10.1080/00107517008204809

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

The first part of the article describes the calculation of magnetostatic energies (which are necessary to predict the critical sizes of crystals below which domains cease to form) and of the domain spacing or number of domains per crystal. Methods suitable for periodic ‘magnetic charge’ distributions in semi-infinite crystals and for finite distributions are described, and both planar and cylindrical domain walls are included. The reasons for the special interest in small crystals is discussed.

ISSN:0010-7514    

DOI:10.1080/00107517008204810

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

摘要:

Gravity and the Earth. (Wykeham Science Series No.6.) By A. H. Cook. (Wykeham Publications (London) Ltd., 1969.) [Pp. xi + 94.] £1.00. Scope: Survey. Level: General reader; undergraduate; school.

ISSN:0010-7514    

DOI:10.1080/00107517008204811

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor

ISSN:0010-7514    

DOI:10.1080/00107517008204812

出版商:Taylor & Francis Group    

年代:1970

数据来源: Taylor