Abstract
We report the effectiveness of barium niobate as a needle-type vortex pinning center, as well as a change in the vortex state in Ba-Nb-O (BNO)-doped ErBa2Cu3Oy thin films. BNO doping was effective for improving critical current properties for a magnetic field direction parallel to the c axis of a matrix film and induced the generation of columnar defects with diameters of 5-25nm. The irreversibility lines were also changed by the BNO doping and were similar to those of heavy-ion-irradiated YBa 2Cu3Oy crystals in which the vortex Bose glass state was induced. It is suggested that the characteristic field relevant to crossover from the Bose glass to collective pinned glass depends on the BNO doping level. There is a possibility that Ba-based perovskite-type oxides promote the formation of nanorods universally and these nanorods play the role of one-dimensional c-axis-correlated pinning centers.
| Original language | English |
|---|---|
| Pages (from-to) | 1115-1119 |
| Number of pages | 5 |
| Journal | Superconductor Science and Technology |
| Volume | 20 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - Dec 1 2007 |
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All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Condensed Matter Physics
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry
Cite this
Introduction of c-axis-correlated 1D pinning centers and vortex Bose glass in Ba-Nb-O-doped ErBa2Cu3Oy films. / Horii, S.; Yamada, K.; Kai, H.; Ichinose, A.; Mukaida, Masashi; Teranishi, Ryo; Kita, R.; Matsumoto, K.; Yoshida, Y.; Shimoyama, J.; Kishio, K.
In: Superconductor Science and Technology, Vol. 20, No. 12, 01.12.2007, p. 1115-1119.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Introduction of c-axis-correlated 1D pinning centers and vortex Bose glass in Ba-Nb-O-doped ErBa2Cu3Oy films
AU - Horii, S.
AU - Yamada, K.
AU - Kai, H.
AU - Ichinose, A.
AU - Mukaida, Masashi
AU - Teranishi, Ryo
AU - Kita, R.
AU - Matsumoto, K.
AU - Yoshida, Y.
AU - Shimoyama, J.
AU - Kishio, K.
PY - 2007/12/1
Y1 - 2007/12/1
N2 - We report the effectiveness of barium niobate as a needle-type vortex pinning center, as well as a change in the vortex state in Ba-Nb-O (BNO)-doped ErBa2Cu3Oy thin films. BNO doping was effective for improving critical current properties for a magnetic field direction parallel to the c axis of a matrix film and induced the generation of columnar defects with diameters of 5-25nm. The irreversibility lines were also changed by the BNO doping and were similar to those of heavy-ion-irradiated YBa 2Cu3Oy crystals in which the vortex Bose glass state was induced. It is suggested that the characteristic field relevant to crossover from the Bose glass to collective pinned glass depends on the BNO doping level. There is a possibility that Ba-based perovskite-type oxides promote the formation of nanorods universally and these nanorods play the role of one-dimensional c-axis-correlated pinning centers.
AB - We report the effectiveness of barium niobate as a needle-type vortex pinning center, as well as a change in the vortex state in Ba-Nb-O (BNO)-doped ErBa2Cu3Oy thin films. BNO doping was effective for improving critical current properties for a magnetic field direction parallel to the c axis of a matrix film and induced the generation of columnar defects with diameters of 5-25nm. The irreversibility lines were also changed by the BNO doping and were similar to those of heavy-ion-irradiated YBa 2Cu3Oy crystals in which the vortex Bose glass state was induced. It is suggested that the characteristic field relevant to crossover from the Bose glass to collective pinned glass depends on the BNO doping level. There is a possibility that Ba-based perovskite-type oxides promote the formation of nanorods universally and these nanorods play the role of one-dimensional c-axis-correlated pinning centers.
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U2 - 10.1088/0953-2048/20/12/005
DO - 10.1088/0953-2048/20/12/005
M3 - Article
AN - SCOPUS:36248942984
VL - 20
SP - 1115
EP - 1119
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
SN - 0953-2048
IS - 12
ER -