Temperature-dependent roles of inter- and intragrain current systems on the critical current and magnetization of BSCCO-2223/Ag tapes

Jaakko Paasi; Peter Kottman; Milan Polák

doi:10.1016/0921-4534(95)00326-6

Temperature-dependent roles of inter- and intragrain current systems on the critical current and magnetization of BSCCO-2223/Ag tapes

Jaakko Paasi^*
, Peter Kottman
, Milan Polák

^*Corresponding author for this work

Not published at VTT

Tampere University of Technology (TUT)
University of Wisconsin-Madison

Research output: Contribution to journal › Article › Scientific › peer-review

11 Citations (Scopus)

Abstract

In this study we examine the role of inter- and intragrain current systems on the temperature-dependent critical current and magnetization of BSCCO-2223/Ag tapes. Experiments were done by measuring the sample magnetization field with movable miniature Hall sensors. We found that both systems have their own irreversible characteristics. The overall level of the intergrain (transport) critical current density, J_c, was limited at both lower (<30 K) and higher temperatures (30-95 K) by intergranular flux pinning, which seemed to be related to the maximum Josephson current of the weak links. Furthermore, we found that the irreversible intragranular magnetization has an influence on the magnetic field dependence of the intergrain J_c: when the intragrain pinning is strong (as at lower temperatures), the reduction of J_c in magnetic fields is moderate, and, when it is weaker (at higher temperatures), the decrease of J_c in fields is strong. This is a consequence of the field dependence of the maximum Josephson current density of the weak links, when the adjacent superconducting grains are in the mixed state.

Original language	English
Pages (from-to)	350-360
Number of pages	11
Journal	Physica C: Superconductivity and its Applications
Volume	249
Issue number	3-4
DOIs	https://doi.org/10.1016/0921-4534(95)00326-6
Publication status	Published - 15 Jul 1995
MoE publication type	A1 Journal article-refereed

Funding

The authors would like to acknowledge J.A. Parrell and D.C. Larbalestier from University of Wisconsin for supply of the tapes and Fig. 1. Furthermore, we thank J. Kvitkovic from Slovak Academy of Sciences and M. Lahtinen from Tampere University of Technology for technical assis- tance. J. Paasi thanks the Finnish Academy and P. Kottman thanks CIMO for the support of the work.

Access to Document

10.1016/0921-4534(95)00326-6

Cite this

@article{c0976677d9094971a903fcb383fa721c,

title = "Temperature-dependent roles of inter- and intragrain current systems on the critical current and magnetization of BSCCO-2223/Ag tapes",

abstract = "In this study we examine the role of inter- and intragrain current systems on the temperature-dependent critical current and magnetization of BSCCO-2223/Ag tapes. Experiments were done by measuring the sample magnetization field with movable miniature Hall sensors. We found that both systems have their own irreversible characteristics. The overall level of the intergrain (transport) critical current density, Jc, was limited at both lower (<30 K) and higher temperatures (30-95 K) by intergranular flux pinning, which seemed to be related to the maximum Josephson current of the weak links. Furthermore, we found that the irreversible intragranular magnetization has an influence on the magnetic field dependence of the intergrain Jc: when the intragrain pinning is strong (as at lower temperatures), the reduction of Jc in magnetic fields is moderate, and, when it is weaker (at higher temperatures), the decrease of Jc in fields is strong. This is a consequence of the field dependence of the maximum Josephson current density of the weak links, when the adjacent superconducting grains are in the mixed state.",

author = "Jaakko Paasi and Peter Kottman and Milan Pol{\'a}k",

year = "1995",

month = jul,

day = "15",

doi = "10.1016/0921-4534(95)00326-6",

language = "English",

volume = "249",

pages = "350--360",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

number = "3-4",

}

TY - JOUR

T1 - Temperature-dependent roles of inter- and intragrain current systems on the critical current and magnetization of BSCCO-2223/Ag tapes

AU - Paasi, Jaakko

AU - Kottman, Peter

AU - Polák, Milan

PY - 1995/7/15

Y1 - 1995/7/15

N2 - In this study we examine the role of inter- and intragrain current systems on the temperature-dependent critical current and magnetization of BSCCO-2223/Ag tapes. Experiments were done by measuring the sample magnetization field with movable miniature Hall sensors. We found that both systems have their own irreversible characteristics. The overall level of the intergrain (transport) critical current density, Jc, was limited at both lower (<30 K) and higher temperatures (30-95 K) by intergranular flux pinning, which seemed to be related to the maximum Josephson current of the weak links. Furthermore, we found that the irreversible intragranular magnetization has an influence on the magnetic field dependence of the intergrain Jc: when the intragrain pinning is strong (as at lower temperatures), the reduction of Jc in magnetic fields is moderate, and, when it is weaker (at higher temperatures), the decrease of Jc in fields is strong. This is a consequence of the field dependence of the maximum Josephson current density of the weak links, when the adjacent superconducting grains are in the mixed state.

AB - In this study we examine the role of inter- and intragrain current systems on the temperature-dependent critical current and magnetization of BSCCO-2223/Ag tapes. Experiments were done by measuring the sample magnetization field with movable miniature Hall sensors. We found that both systems have their own irreversible characteristics. The overall level of the intergrain (transport) critical current density, Jc, was limited at both lower (<30 K) and higher temperatures (30-95 K) by intergranular flux pinning, which seemed to be related to the maximum Josephson current of the weak links. Furthermore, we found that the irreversible intragranular magnetization has an influence on the magnetic field dependence of the intergrain Jc: when the intragrain pinning is strong (as at lower temperatures), the reduction of Jc in magnetic fields is moderate, and, when it is weaker (at higher temperatures), the decrease of Jc in fields is strong. This is a consequence of the field dependence of the maximum Josephson current density of the weak links, when the adjacent superconducting grains are in the mixed state.

UR - https://www.scopus.com/pages/publications/0029341280

U2 - 10.1016/0921-4534(95)00326-6

DO - 10.1016/0921-4534(95)00326-6

M3 - Article

AN - SCOPUS:0029341280

SN - 0921-4534

VL - 249

SP - 350

EP - 360

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 3-4

ER -

Temperature-dependent roles of inter- and intragrain current systems on the critical current and magnetization of BSCCO-2223/Ag tapes

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this