Results found: 3

Number of results on page

Search results

Sort By:

Limit search:

Study of Excimer Laser Irradiation Effects on Properties of Crystalline YBaCuO Thin Films

100%

Abal'oshev A., Abal'osheva I., Lewandowski S., van der Beek C., Konczykowski M., Rizza G., Barbanera S.

Acta Physica Polonica A

2004

vol. 106

issue 5

681-685

The influence of UV laser irradiation on the physical properties of epitaxial YBa_2Cu_3O_{7-δ} thin (<1μm) films fabricated by laser ablation was studied. The samples were irradiated by pulsed excimer laser beam at different incident energy densities E_{ir}≤130 mJ/cm^2, i.e. 2-3 times below the ablation threshold of YBaCuO. The analysis of the sample cross-section using transmission electron microscope shows that such irradiation forms a disordered layer on the top of the crystalline film. Sample surface amorphization was observed also by atomic force microscope. Due to strong UV irradiation absorption in YBaCuO this surface layer acts like a protective cover for the sample interior. Only a small reduction of superconducting critical temperature T_c was observed. Both transport measurements in normal state and magneto-optical studies in superconducting state indicate that between the disordered layer and the bottom non-modified part of the film there exists a wide transitional region with reduced carrier concentration.

Superconducting Pinning by Magnetic Domains in a Ferromagnet-Superconductor Bilayer

84%

Cieplak M., Adamus Z., Konczykowski M., Chen X., Byczuk A., Abal'oshev A., Sang H., Chien C.

Acta Physica Polonica A

2004

vol. 106

issue 5

693-698

The local flux profile and the critical current are studied using an array of Hall sensors in a ferromagnetic-superconducting bilayer which consists of niobium film covering ferromagnetic Co/Pt multilayer with perpendicular magnetic anisotropy. The results indicate about threefold enhancement of the flux pinning in niobium layer caused by the isolated magnetic domains which are created during the magnetization reversal of the Co/Pt multilayer. The geometrical barrier is absent, and the critical current is strongly peaked in close vicinity to the sample center, suggesting that the critical state differs from that predicted by the Bean model.

Structure and Magnetic Characterization οf BiFeO_3/YBa_2Cu_3O_7 Bilayers

84%

Werner-Malento K., Tsarou A., Dluzewski P., Paszkowicz W., Minikayev R., Sawicki M., van der Beek K., Konczykowski M., Przyslupski P.

Acta Physica Polonica A

2009

vol. 115

issue 1

95-97

Bilayered epitaxial BiFeO_3/YBa_2Cu_3O_7 films were fabricated on (100) [(LaAlO_3)_{0.3}(Sr_2TaAlO_6)_{0.7}] substrates by sputtering method. For structural comparison the bilayered BiFeO_3/La_{0.67}Sr_{0.33}MnO_3 films were also deposited on (100) SrTiO_3 substrates. A weak ferromagnetic moment is observed in BiFeO_3/YBa_2Cu_3O_7 films. The mechanism responsible for weak ferromagnetic moment arises presumably from the epitaxy strain induced canted antiferromagnetic structure.

Refine search results

3 Acta Physica Polonica A

1 2009

2 2004

3 Konczykowski M.

2 Abal'oshev A.

1 Abal'osheva I.

1 Adamus Z.

1 Barbanera S.

1 Byczuk A.

1 Chen X.

1 Chien C.

1 Cieplak M.

1 Dluzewski P.

1 Lewandowski S.

1 Minikayev R.

1 Paszkowicz W.

1 Przyslupski P.

1 Rizza G.

1 Sang H.

1 Sawicki M.

1 Tsarou A.

1 Werner-Malento K.

1 van der Beek C.

1 van der Beek K.

Search results

Study of Excimer Laser Irradiation Effects on Properties of Crystalline YBaCuO Thin Films

Superconducting Pinning by Magnetic Domains in a Ferromagnet-Superconductor Bilayer

Structure and Magnetic Characterization οf BiFeO_3/YBa_2Cu_3O_7 Bilayers