Abstract
We measure the complex conductivity σ and the surface impedance of c-axis oriented 100-nm-thick YBa2Cu3O7-δ (YBCO) thin films deposited on (100)MgO substrates (0.5 mm thick) at frequencies between 0.5 and 1.5 THz, using time-domain terahertz spectroscopy. The real part of σ decreases with increasing frequency and its value is about 2.4×105 (S/m) at 1 THz. The imaginary part of σ increases with increasing frequency and then monotonically decreases at around 750 GHz. The real part of σ of YBCO thin films increased with decreasing temperature and decreases below 60 K. The imaginary part of σ increased with decreasing temperature and the trend is enhanced below 60 K. The surface resistance of YBCO thin film is of the order of 10-1Ω and increases with increasing temperature. The surface reactance of YBCO thin film is independent of the frequency in this THz region, and its value is less than 10-3Ω at 40 K.
| Original language | English |
|---|---|
| Pages (from-to) | 314-318 |
| Number of pages | 5 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 362 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Sep 2001 |
| Externally published | Yes |
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Keywords
- Complex conductivity
- Surface impedance
- Time-domain terahertz spectroscopy
- YBCO
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
High frequency properties of YBCO thin films diagnosed by time-domain terahertz spectroscopy. / Kiwa, Toshihiko; Tonouchi, Masayoshi.
In: Physica C: Superconductivity and its Applications, Vol. 362, No. 1, 09.2001, p. 314-318.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - High frequency properties of YBCO thin films diagnosed by time-domain terahertz spectroscopy
AU - Kiwa, Toshihiko
AU - Tonouchi, Masayoshi
PY - 2001/9
Y1 - 2001/9
N2 - We measure the complex conductivity σ and the surface impedance of c-axis oriented 100-nm-thick YBa2Cu3O7-δ (YBCO) thin films deposited on (100)MgO substrates (0.5 mm thick) at frequencies between 0.5 and 1.5 THz, using time-domain terahertz spectroscopy. The real part of σ decreases with increasing frequency and its value is about 2.4×105 (S/m) at 1 THz. The imaginary part of σ increases with increasing frequency and then monotonically decreases at around 750 GHz. The real part of σ of YBCO thin films increased with decreasing temperature and decreases below 60 K. The imaginary part of σ increased with decreasing temperature and the trend is enhanced below 60 K. The surface resistance of YBCO thin film is of the order of 10-1Ω and increases with increasing temperature. The surface reactance of YBCO thin film is independent of the frequency in this THz region, and its value is less than 10-3Ω at 40 K.
AB - We measure the complex conductivity σ and the surface impedance of c-axis oriented 100-nm-thick YBa2Cu3O7-δ (YBCO) thin films deposited on (100)MgO substrates (0.5 mm thick) at frequencies between 0.5 and 1.5 THz, using time-domain terahertz spectroscopy. The real part of σ decreases with increasing frequency and its value is about 2.4×105 (S/m) at 1 THz. The imaginary part of σ increases with increasing frequency and then monotonically decreases at around 750 GHz. The real part of σ of YBCO thin films increased with decreasing temperature and decreases below 60 K. The imaginary part of σ increased with decreasing temperature and the trend is enhanced below 60 K. The surface resistance of YBCO thin film is of the order of 10-1Ω and increases with increasing temperature. The surface reactance of YBCO thin film is independent of the frequency in this THz region, and its value is less than 10-3Ω at 40 K.
KW - Complex conductivity
KW - Surface impedance
KW - Time-domain terahertz spectroscopy
KW - YBCO
UR - http://www.scopus.com/inward/record.url?scp=0035448474&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035448474&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(01)00695-5
DO - 10.1016/S0921-4534(01)00695-5
M3 - Article
AN - SCOPUS:0035448474
VL - 362
SP - 314
EP - 318
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 1
ER -