摘要:

Sputtered Nb3Ge films are doped with hydrogen by exposing them to acid and the effects of this hydrogen are studied. The hydrogen content of these films is measured using the15N nuclear resonance profiling method. Hydrogen incorporated at concentrations up to 1.8×1022cm−3(23 at.%) expands the lattice up to 2.5% and depresses the superconducting transition temperatureTc, ∼1 K per 1021H atoms/cm3. Hydrogen is also found in as‐sputtered films, the amount increasing as the film deposition temperature is reduced.

ISSN:0003-6951    

DOI:10.1063/1.90015

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

Sputter‐deposited ’’Nb3Ge’’ films have been found to be fully superconducting at temperatures as high as 20.8 K with an onset of 21.8 K. Conditions under which high‐Tcfilms were formed were unique in that the highestTc’s were obtained at deposition temperatures nearly 200 °C lower than previously reported.

ISSN:0003-6951    

DOI:10.1063/1.90016

出版商:AIP    

年代:1978

数据来源: AIP

摘要:

Ferromagnetic resonance relaxation has been used to study a series of LPE‐grown YIG films containing calcium in increasing concentrations. The considerably large linewidths revealed that a high population of Fe4+ions is allowed to enter the epilayers. Etching techniques and selective heat treatments provided respectively an insight on the Ca‐concentration gradients within the films and a means of confirming the identification of the relaxing ions.

ISSN:0003-6951    

DOI:10.1063/1.90017

出版商:AIP    

年代:1978

数据来源: AIP

ISSN:0003-6951    

DOI:10.1063/1.90144

出版商:AIP    

年代:1978

数据来源: AIP