Laser zone melted Bi2Sr2CaCu2O8+ thick films on (100) MgO substrate

We report here on the development of composite thick films exhibiting hybrid superconducting and ferromagnetic properties, produced through a low-cost, fast, and versatile process. These films were made of high Tc cuprate superconductor Bi2Sr2(Ca,Y)2Cu3O10 (with Y:Ca ratio of 5%) and ferromagnetic perovskite La2/3Ba1/3MnO3, synthesized by melting-quenching annealing process on a MgO substrate. Curie temperature for La2/3Ba1/3MnO3 was determined (~336 K ) by magnetic field assisted thermogravimetric analysis (TGA), while superconducting behavior of Bi2Sr2(Ca,Y)2Cu3O10/MgO films was observed through temperature-dependent resistance measurements. Superconducting features in our hybrid compound were corroborated by temperature-dependent resistivity and magnetic susceptibility.

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Preparation of (11n)-oriented Bi-2201 thick films on (100) MgO substrate by melt quenching technique

Materials Letters ◽

10.1016/0167-577x(94)00226-6 ◽

1995 ◽

Vol 22 (1-2) ◽

pp. 65-69

Author(s):

X.L. Wang ◽

X.Z. Wang

Keyword(s):

Thick Films ◽

Melt Quenching ◽

Mgo Substrate

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Preparation of Bi-Pb-Sr-Ca-Cu-O High Tc Thick Films on Ag or MgO Substrate with Superconductor Paste.

Journal of the Japan Society of Powder and Powder Metallurgy ◽

10.2497/jjspm.42.817 ◽

1995 ◽

Vol 42 (7) ◽

pp. 817-820

Author(s):

Toshiaki Ishikawa ◽

Takashi Tsubota ◽

Kentaro Ohhashi ◽

Nobuyoshi Takabatake

Keyword(s):

Thick Films ◽

High Tc ◽

Mgo Substrate

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Properties of Bi-2223 thick films on a MgO substrate prepared by a coating method

IEEE Transactions on Applied Superconductivity ◽

10.1109/tasc.2003.812517 ◽

2003 ◽

Vol 13 (2) ◽

pp. 3691-3694 ◽

Cited By ~ 3

Author(s):

M. Ichikawa ◽

H. Kado ◽

M. Shibuya ◽

M. Kojima ◽

M. Kawahara ◽

...

Keyword(s):

Thick Films ◽

Coating Method ◽

Mgo Substrate

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Electron Microscopy Studies of The Chemistry And Microstructure of BaF2 / YBa2Cu3O7-x Thin Films

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100171717 ◽

1994 ◽

Vol 52 ◽

pp. 796-797

Author(s):

J. L. Lee ◽

C. A. Weiss ◽

R. A. Buhrman ◽

J. Silcox

Keyword(s):

Thin Film ◽

Electron Microscopy ◽

Thin Films ◽

Scanning Transmission Electron Microscope ◽

Atomic Scale ◽

Island Growth ◽

Multilayer Systems ◽

Transmission Electron ◽

Scanning Transmission ◽

Mgo Substrate

BaF2 thin films are being investigated as candidates for use in YBa2Cu3O7-x (YBCO) / BaF2 thin film multilayer systems, given the favorable dielectric properties of BaF2. In this study, the microstructural and chemical compatibility of BaF2 thin films with YBCO thin films is examined using transmission electron microscopy and microanalysis. The specimen was prepared by using laser ablation to first deposit an approximately 2500 Å thick (0 0 1) YBCO thin film onto a (0 0 1) MgO substrate. An approximately 7500 Å thick (0 0 1) BaF2 thin film was subsequendy thermally evaporated onto the YBCO film.Images from a VG HB501A UHV scanning transmission electron microscope (STEM) operating at 100 kV show that the thickness of the BaF2 film is rather uniform, with the BaF2/YBCO interface being quite flat. Relatively few intrinsic defects, such as hillocks and depressions, were evident in the BaF2 film. Moreover, the hillocks and depressions appear to be faceted along {111} planes, suggesting that the surface is smooth and well-ordered on an atomic scale and that an island growth mechanism is involved in the evolution of the BaF2 film.

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