NDLI: Defining <formula formulatype=inline><tex Notation=TeX>$B_{c}$</tex> </formula>, <formula formulatype=inline><tex Notation=TeX>$B^{ast}$</tex> </formula> and <formula formulatype=inline><tex Notation=TeX>$B_{phi}$</tex> </formula> for YBCO Thin Films

Content Provider	IEEE Xplore Digital Library
Author	Paturi, P. Irjala, M. Abrahamsen, A.B. Huhtinen, H.
Copyright Year	2002
Abstract	The accommodation field, B* , is generally defined to be the field at which the cross over from single vortex pinning to collective pinning occurs. It is determined from magnetization curves as the point where the J _c plateau ends and it used as a convenient way of comparing the pinning properties of superconducting films. Similarly, the characteristic field, B _c, can be obtained from magneto-optical (MO) images from when the flux fronts meet in the middle of the film. The matching field, B _phi, at which there is one vortex line per pinning site, is sometimes thought to be the same as B, but in BaZrO₃-doped YBa₂Cu₃O₇ films the calculated B _phi is much higher than the observed B. B _phi can be determined from angular dependent transport measurements. All of the field values correspond to some special case in the flux pinning in the film and relate to J _c. In this work we have determined B _c, B* and B _phi for different kinds of YBCO films using MO, magnetization and transport measurements to reveal the deeper meaning of the special fields.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	3431
Ending Page	3434
Page Count	4
File Size	276082
File Format	PDF
ISSN	10518223
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Superconducting films Magnetic field measurement Yttrium barium copper oxide Magnetization Extraterrestrial measurements Laboratories Transistors Magnetic hysteresis Physics Astronomy YBCO thin films Accommodation field characteristic field matching field
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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