Complicated shape of the superconductive transition curve revealed by a sensitive OFC-magnetometer

Samvel Gevorgyan; Takanobu Kiss; Hovsep Shirinyan; Artur Movsisyan; Vardan Gevorgyan; Shinichi Egashira; Yuri Eltsev; Teruo Matsushita; Toshiyuki Mito; Masakatsu Takeo

doi:10.1109/TASC.2003.812401

Complicated shape of the superconductive transition curve revealed by a sensitive OFC-magnetometer

Samvel Gevorgyan, Takanobu Kiss, Hovsep Shirinyan, Artur Movsisyan, Vardan Gevorgyan, Shinichi Egashira, Yuri Eltsev, Teruo Matsushita, Toshiyuki Mito, Masakatsu Takeo

Section of Measurement and Control Engineering

Research output: Contribution to journal › Conference article › peer-review

Abstract

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 T_c (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.

Original language	English
Pages (from-to)	3574-3577
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	13
Issue number	2 III
DOIs	https://doi.org/10.1109/TASC.2003.812401
Publication status	Published - Jun 1 2003
Event	2002 Applied Superconductivity Conference - Houston, TX, United States Duration: Aug 4 2002 → Aug 9 2002

All Science Journal Classification (ASJC) codes

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

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Complicated shape of the superconductive transition curve revealed by a sensitive OFC-magnetometer. / Gevorgyan, Samvel; Kiss, Takanobu; Shirinyan, Hovsep; Movsisyan, Artur; Gevorgyan, Vardan; Egashira, Shinichi; Eltsev, Yuri; Matsushita, Teruo; Mito, Toshiyuki; Takeo, Masakatsu.

In: IEEE Transactions on Applied Superconductivity, Vol. 13, No. 2 III, 01.06.2003, p. 3574-3577.

Research output: Contribution to journal › Conference article › peer-review

Gevorgyan, Samvel ; Kiss, Takanobu ; Shirinyan, Hovsep ; Movsisyan, Artur ; Gevorgyan, Vardan ; Egashira, Shinichi ; Eltsev, Yuri ; Matsushita, Teruo ; Mito, Toshiyuki ; Takeo, Masakatsu. / Complicated shape of the superconductive transition curve revealed by a sensitive OFC-magnetometer. In: IEEE Transactions on Applied Superconductivity. 2003 ; Vol. 13, No. 2 III. pp. 3574-3577.

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abstract = "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.",

author = "Samvel Gevorgyan and Takanobu Kiss and Hovsep Shirinyan and Artur Movsisyan and Vardan Gevorgyan and Shinichi Egashira and Yuri Eltsev and Teruo Matsushita and Toshiyuki Mito and Masakatsu Takeo",

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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

PY - 2003/6/1

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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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