Origins of Nondestructive Readout of Plated Wires

Autor:	R. E. Skoda, W. D. Barber, F. E. Luborsky
Rok vydání:	1971
Předmět:	Permalloy Materials science business.industry General Physics and Astronomy chemistry.chemical_element Nanotechnology Surface finish Coercivity Copper Signal Grain size chemistry Dispersion (optics) Optoelectronics business Electroplating
Zdroj:	Journal of Applied Physics. 42:1428-1430
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.1660277
Popis:	The nondestructive readout (NDRO) capability of 3650‐A‐thick Permalloy electroplated onto a variety of substrates has been evaluated using an on‐line Belson test. The NDRO quality is evaluated using, not only the wall motion coercive force, but also the write threshold, the read only limit, Hk and the signal output. Various combinations of physical roughness and grain size of copper and gold substrates are compared. On smooth very fine grained Au substrates low dispersion and low coercive force films are produced which are not suitable for NDRO; with increasing grain size and roughness the NDRO quality improves. A substantial further improvement in NDRO quality is obtained by producing a new kind of substrate surface; namely, a surface composed of Au islands on rough Cu. The same small quantity of Au deposited on a smooth, finer grain Cu, although better than Permalloy deposited on the smooth very fine grain Au, is not as good as Permalloy directly on rough Cu. The presence of Au islands is confirmed from...
Databáze:	OpenAIRE
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