Microwave Absorption of YBa2Cu307 Thin Films with Columnar Defects

S. E. Lofland; M. X. Huang; S. M. Bhagat; M. Rajeswari; T. Venkatesan; L. Senapati; G. K. Mehta; D. Kanjilal

doi:10.1109/77.402833

Microwave Absorption of YBa2Cu307 Thin Films with Columnar Defects

S. E. Lofland, M. X. Huang, S. M. Bhagat, M. Rajeswari, T. Venkatesan, L. Senapati, G. K. Mehta, D. Kanjilal

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

2 Scopus citations

Abstract

We have measured the microwave magnetoabsorption of both pristine and irradiated c-axis-oriented YBa2Cu3O7thin films. The irradiation was done using 270-MeV Ag ions and produces columnar defects along the film normal. The angular dependence of the absorption for pristine films can be desribed by sinθ; where 0 is the inclination of the field from the film plane. However, there is a minimum in the magnetoabsorption of the irradiated films when the applied field is parallel to the columns. This minimum is indicative of vortex localization as predicted by Nelson and Vinokur. We believe that this is the first high-frequency measurement of this phenomenon.

Original language	English (US)
Pages (from-to)	1428-1431
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	5
Issue number	2
DOIs	https://doi.org/10.1109/77.402833
State	Published - Jun 1995
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/77.402833

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title = "Microwave Absorption of YBa2Cu307 Thin Films with Columnar Defects",

abstract = "We have measured the microwave magnetoabsorption of both pristine and irradiated c-axis-oriented YBa2Cu3O7thin films. The irradiation was done using 270-MeV Ag ions and produces columnar defects along the film normal. The angular dependence of the absorption for pristine films can be desribed by sinθ; where 0 is the inclination of the field from the film plane. However, there is a minimum in the magnetoabsorption of the irradiated films when the applied field is parallel to the columns. This minimum is indicative of vortex localization as predicted by Nelson and Vinokur. We believe that this is the first high-frequency measurement of this phenomenon.",

author = "Lofland, {S. E.} and Huang, {M. X.} and Bhagat, {S. M.} and M. Rajeswari and T. Venkatesan and L. Senapati and Mehta, {G. K.} and D. Kanjilal",

note = "Funding Information: This work supported in part by EPFU Grant No. 8809-27, ONR Grant",

year = "1995",

month = jun,

doi = "10.1109/77.402833",

language = "English (US)",

volume = "5",

pages = "1428--1431",

journal = "IEEE Transactions on Applied Superconductivity",

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publisher = "Institute of Electrical and Electronics Engineers Inc.",

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T1 - Microwave Absorption of YBa2Cu307 Thin Films with Columnar Defects

AU - Lofland, S. E.

AU - Huang, M. X.

AU - Bhagat, S. M.

AU - Rajeswari, M.

AU - Venkatesan, T.

AU - Senapati, L.

AU - Mehta, G. K.

AU - Kanjilal, D.

N1 - Funding Information: This work supported in part by EPFU Grant No. 8809-27, ONR Grant

PY - 1995/6

Y1 - 1995/6

N2 - We have measured the microwave magnetoabsorption of both pristine and irradiated c-axis-oriented YBa2Cu3O7thin films. The irradiation was done using 270-MeV Ag ions and produces columnar defects along the film normal. The angular dependence of the absorption for pristine films can be desribed by sinθ; where 0 is the inclination of the field from the film plane. However, there is a minimum in the magnetoabsorption of the irradiated films when the applied field is parallel to the columns. This minimum is indicative of vortex localization as predicted by Nelson and Vinokur. We believe that this is the first high-frequency measurement of this phenomenon.

AB - We have measured the microwave magnetoabsorption of both pristine and irradiated c-axis-oriented YBa2Cu3O7thin films. The irradiation was done using 270-MeV Ag ions and produces columnar defects along the film normal. The angular dependence of the absorption for pristine films can be desribed by sinθ; where 0 is the inclination of the field from the film plane. However, there is a minimum in the magnetoabsorption of the irradiated films when the applied field is parallel to the columns. This minimum is indicative of vortex localization as predicted by Nelson and Vinokur. We believe that this is the first high-frequency measurement of this phenomenon.

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Microwave Absorption of YBa2Cu307 Thin Films with Columnar Defects

Abstract

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