TY - JOUR
T1 - Complicated shape of the superconductive transition curve revealed by a sensitive OFC-magnetometer
AU - Gevorgyan, Samvel
AU - Kiss, Takanobu
AU - Shirinyan, Hovsep
AU - Movsisyan, Artur
AU - Gevorgyan, Vardan
AU - Egashira, Shinichi
AU - Eltsev, Yuri
AU - Matsushita, Teruo
AU - Mito, Toshiyuki
AU - Takeo, Masakatsu
N1 - Funding Information:
Manuscript received August 5, 2002. This study was supported in part by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications. The work was supported also by the ‘Armenian Foundation for Basic Research’ under Grant 02-1359.
PY - 2003/6
Y1 - 2003/6
N2 - Because of pick-up coil's flat design, relatively low operation frequency (∼ 23 MHz) and high relative resolution (10-6) a single-layer Open-Flat Coil-based tunnel diode oscillator (OFC-magnetometer) has advantages, compared to other test methods. They become crucial at nondestructive studies with thin flat HTS materials (with small signals), especially near Tc (at start of the 'Cooper' pairs' formation). Due to these a new 'Para-Magnetic' peculiarity of the normal-to-superconductive (N/S) transition was detected recently in YBaCuO films. It precedes the 'Meissner' ejection and specifies details of. an actually complicated shape of the N/S transition curve. We discuss influence of the currents and magnetic field on the PM effect and relationship between the quality of HTS material and amplitude of the effect. Differences between PM effect and externally close 'paramagnetic Meissner' and resistive 'peak' effects are discussed too.
AB - Because of pick-up coil's flat design, relatively low operation frequency (∼ 23 MHz) and high relative resolution (10-6) a single-layer Open-Flat Coil-based tunnel diode oscillator (OFC-magnetometer) has advantages, compared to other test methods. They become crucial at nondestructive studies with thin flat HTS materials (with small signals), especially near Tc (at start of the 'Cooper' pairs' formation). Due to these a new 'Para-Magnetic' peculiarity of the normal-to-superconductive (N/S) transition was detected recently in YBaCuO films. It precedes the 'Meissner' ejection and specifies details of. an actually complicated shape of the N/S transition curve. We discuss influence of the currents and magnetic field on the PM effect and relationship between the quality of HTS material and amplitude of the effect. Differences between PM effect and externally close 'paramagnetic Meissner' and resistive 'peak' effects are discussed too.
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U2 - 10.1109/TASC.2003.812401
DO - 10.1109/TASC.2003.812401
M3 - Conference article
AN - SCOPUS:0041473418
VL - 13
SP - 3574
EP - 3577
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 2 III
T2 - 2002 Applied Superconductivity Conference
Y2 - 3 August 2002 through 8 August 2002
ER -