Third-order nonlinear microwave response of YBa2Cu3O7-δ thin films and single crystals

G. Hampel; B. Batlogg; K. Krishana; N. P. Ong; W. Prusseit; H. Kinder; A. C. Anderson

doi:10.1063/1.120539

Third-order nonlinear microwave response of YBa₂Cu₃O_7-δ thin films and single crystals

G. Hampel, B. Batlogg, K. Krishana, N. P. Ong, W. Prusseit, H. Kinder, A. C. Anderson

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35 Scopus citations

Abstract

The nonlinear microwave response of superconducting YBa₂Cu₃O_7-δ thin films and crystals was studied quantitatively by measuring the third-order harmonic amplitude A_3ω (ω: 35 GHz, j_RF≤3 × 10⁴ A/cm²). We find E_3ω to be dominated by two extrinsic effects: (1) the interaction with flux lines in weak links leading to an increased nonlinear response at low temperatures, and (2) rf related flux line creation at film edges, yielding a high E_3ω-signal close to T_c. Both effects together lead to a minimum in E_3ω around 40-60 K, which makes this temperature interval interesting for rf applications. Intrinsic nonlinearities are smaller by orders of magnitude and could not be detected.

Original language	English (US)
Pages (from-to)	3904-3906
Number of pages	3
Journal	Applied Physics Letters
Volume	71
Issue number	26
DOIs	https://doi.org/10.1063/1.120539
State	Published - Dec 29 1997

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.120539

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title = "Third-order nonlinear microwave response of YBa2Cu3O7-δ thin films and single crystals",

abstract = "The nonlinear microwave response of superconducting YBa2Cu3O7-δ thin films and crystals was studied quantitatively by measuring the third-order harmonic amplitude A3ω (ω: 35 GHz, jRF≤3 × 104 A/cm2). We find E3ω to be dominated by two extrinsic effects: (1) the interaction with flux lines in weak links leading to an increased nonlinear response at low temperatures, and (2) rf related flux line creation at film edges, yielding a high E3ω-signal close to Tc. Both effects together lead to a minimum in E3ω around 40-60 K, which makes this temperature interval interesting for rf applications. Intrinsic nonlinearities are smaller by orders of magnitude and could not be detected.",

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T1 - Third-order nonlinear microwave response of YBa2Cu3O7-δ thin films and single crystals

AU - Hampel, G.

AU - Batlogg, B.

AU - Krishana, K.

AU - Ong, N. P.

AU - Prusseit, W.

AU - Kinder, H.

AU - Anderson, A. C.

PY - 1997/12/29

Y1 - 1997/12/29

N2 - The nonlinear microwave response of superconducting YBa2Cu3O7-δ thin films and crystals was studied quantitatively by measuring the third-order harmonic amplitude A3ω (ω: 35 GHz, jRF≤3 × 104 A/cm2). We find E3ω to be dominated by two extrinsic effects: (1) the interaction with flux lines in weak links leading to an increased nonlinear response at low temperatures, and (2) rf related flux line creation at film edges, yielding a high E3ω-signal close to Tc. Both effects together lead to a minimum in E3ω around 40-60 K, which makes this temperature interval interesting for rf applications. Intrinsic nonlinearities are smaller by orders of magnitude and could not be detected.

AB - The nonlinear microwave response of superconducting YBa2Cu3O7-δ thin films and crystals was studied quantitatively by measuring the third-order harmonic amplitude A3ω (ω: 35 GHz, jRF≤3 × 104 A/cm2). We find E3ω to be dominated by two extrinsic effects: (1) the interaction with flux lines in weak links leading to an increased nonlinear response at low temperatures, and (2) rf related flux line creation at film edges, yielding a high E3ω-signal close to Tc. Both effects together lead to a minimum in E3ω around 40-60 K, which makes this temperature interval interesting for rf applications. Intrinsic nonlinearities are smaller by orders of magnitude and could not be detected.

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Third-order nonlinear microwave response of YBa₂Cu₃O_7-δ thin films and single crystals

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