摘要:

It was proven by powder x‐ray diffractometry and by energy dispersive x‐ray analysis (EDX) that after ablation of the ceramic YBa2Cu3O7−xtarget by the excimer laser pulses the original composition of the target remained unchanged. The depth of ablation was measured as a function of the energy density of the laser beam. The absorption coefficient for ablation, in case of ceramic material with a density of 5.4 g/cm3, was &agr;=4.45×104cm−1and the minimum energy density was 2.5 J/cm2. The temperature that the ablated material was subjected to, in the energy range of 2.5–3.4 J/cm2, did not exceed 970 °C.<l >  

ISSN:0003-6951    

DOI:10.1063/1.106068

出版商:AIP    

年代:1991

数据来源: AIP

摘要:

Using spin‐polarized photoemission with a pulsed laser as light source, it is shown that the time for a thermally induced magnetization reversal depends critically on the temperature of the sample. For amorphous GdTbFe the time is shorter (longer) than the duration of the 16 ns laser pulses if the initial temperature is below (above) the compensation temperature.

ISSN:0003-6951    

DOI:10.1063/1.106069

出版商:AIP    

年代:1991

数据来源: AIP

摘要:

Vertical platinum sidewall structures 50 nm thick and 700 nm tall have been fabricated by Pt deposition from the thermal decomposition of tetrakis‐(trifluorophosphine)‐platinum using an effusive gas source followed by ion‐assisted etching. Scanning electron microscope micrographs show that the sidewalls have high uniformity, very fine grains, and very sharp contours, demonstrating a high degree of conformal deposition. Scanning Auger microscopy confirms the presence of platinum only in the sidewalls. X‐ray photoelectron spectroscopy analysis of the as‐deposited platinum film reveals no detectable impurity and Scotch tape test shows good bonding of the film. The method is suitable to large‐scale processing.

ISSN:0003-6951    

DOI:10.1063/1.106070

出版商:AIP    

年代:1991

数据来源: AIP