The low temperature microwave properties of GdBa₂Cu₃O₇₋δ and Sr₂RuO₄

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The low temperature microwave properties of GdBa₂Cu₃O₇₋δ and Sr₂RuO₄. / Gough, Colin; Ormeno, Rodrigo; Hein, Matthias; Sibley, Andrew; Wingfield, JJ; Powell, J; Porch, Adrian; Yang, Guang; Maeno, Y; Mao, ZQ.

In: Journal of Superconductivity, Vol. 14, No. 1, 01.01.2001, p. 73-79.

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@article{86255cd0247d492988630a3c77702b5d,
title = "The low temperature microwave properties of GdBa₂Cu₃O₇₋δ and Sr₂RuO₄",
abstract = "Measurements of the microwave surface resistance R-s and reactance X-s of GdBa2Cu3O7-delta and Sr2RuO4 single crystals are reported in the temperature range 0.4 to 25 K at frequencies from 10 to 20 GHz, using a hollow dielectric resonator technique. The GdBa2Cu3O7-delta measurements are interpreted in terms of antiferromagnetic alignment of the Gd spins, resulting in a Neel transition at 2.25 K, with a strongly temperature spin relaxation time both above and below the transition. Above T-c = 1.45 K, the normal state surface impedance of the suspected p-wave superconductor Sr2RuO4 agrees rather well with that expected from de measurements; however, below T-c, we observe an unusual increase in the surface reactance, which we attribute to a long electron relaxation time. Using a two-fluid model, we obtain a normal fluid component that decreases almost linearly with temperature and extrapolates to a finite low-temperature value.",
author = "Colin Gough and Rodrigo Ormeno and Matthias Hein and Andrew Sibley and JJ Wingfield and J Powell and Adrian Porch and Guang Yang and Y Maeno and ZQ Mao",
year = "2001",
month = jan,
day = "1",
doi = "10.1023/A:1007836323126",
language = "English",
volume = "14",
pages = "73--79",
journal = "Journal of Superconductivity",
issn = "0896-1107",
publisher = "Springer",
number = "1",

}

RIS

TY - JOUR

T1 - The low temperature microwave properties of GdBa₂Cu₃O₇₋δ and Sr₂RuO₄

AU - Gough, Colin

AU - Ormeno, Rodrigo

AU - Hein, Matthias

AU - Sibley, Andrew

AU - Wingfield, JJ

AU - Powell, J

AU - Porch, Adrian

AU - Yang, Guang

AU - Maeno, Y

AU - Mao, ZQ

PY - 2001/1/1

Y1 - 2001/1/1

N2 - Measurements of the microwave surface resistance R-s and reactance X-s of GdBa2Cu3O7-delta and Sr2RuO4 single crystals are reported in the temperature range 0.4 to 25 K at frequencies from 10 to 20 GHz, using a hollow dielectric resonator technique. The GdBa2Cu3O7-delta measurements are interpreted in terms of antiferromagnetic alignment of the Gd spins, resulting in a Neel transition at 2.25 K, with a strongly temperature spin relaxation time both above and below the transition. Above T-c = 1.45 K, the normal state surface impedance of the suspected p-wave superconductor Sr2RuO4 agrees rather well with that expected from de measurements; however, below T-c, we observe an unusual increase in the surface reactance, which we attribute to a long electron relaxation time. Using a two-fluid model, we obtain a normal fluid component that decreases almost linearly with temperature and extrapolates to a finite low-temperature value.

AB - Measurements of the microwave surface resistance R-s and reactance X-s of GdBa2Cu3O7-delta and Sr2RuO4 single crystals are reported in the temperature range 0.4 to 25 K at frequencies from 10 to 20 GHz, using a hollow dielectric resonator technique. The GdBa2Cu3O7-delta measurements are interpreted in terms of antiferromagnetic alignment of the Gd spins, resulting in a Neel transition at 2.25 K, with a strongly temperature spin relaxation time both above and below the transition. Above T-c = 1.45 K, the normal state surface impedance of the suspected p-wave superconductor Sr2RuO4 agrees rather well with that expected from de measurements; however, below T-c, we observe an unusual increase in the surface reactance, which we attribute to a long electron relaxation time. Using a two-fluid model, we obtain a normal fluid component that decreases almost linearly with temperature and extrapolates to a finite low-temperature value.

UR - http://www.scopus.com/inward/record.url?scp=18044400735&partnerID=8YFLogxK

U2 - 10.1023/A:1007836323126

DO - 10.1023/A:1007836323126

M3 - Article

VL - 14

SP - 73

EP - 79

JO - Journal of Superconductivity

JF - Journal of Superconductivity

SN - 0896-1107

IS - 1

ER -