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Advances in Superconductivity VII: Proceedings of the 7th by J. Georg Bednorz (auth.), Prof. Kaoru Yamafuji, Dr. Tadataka

By J. Georg Bednorz (auth.), Prof. Kaoru Yamafuji, Dr. Tadataka Morishita (eds.)

The box of high-temperature superconductivity has inspired an inter­ disciplinary method of examine. It has required major cooperation and collaboration between researchers, every one of whom has delivered to it a wealthy number of event from many different fields. lately, nice advancements were made within the caliber of analysis. the topic has matured and been embarked on the following degree throughout the resonance among technology and know-how. the present growth of fabrics processing and engineering during this box is similar to that in the past visible within the improvement of semiconductors. those contain the looks of fabrics taking where of YBa2Cu307 as a result of their more advantageous homes (higher severe temperatures and superior flux pin­ ning) within which infrequent earth ions with huge radii (La, Nd, Sm) replacement for Y; the improvement of expertise allowing progress regulate at the nanometer scale; and exact and reproducible measurements that may be used as rigorous checks of theoretical versions, which in flip are anticipated to steer to the strengthen­ ment of latest units. For extra growth in high-T examine, lecturers and c technologists needs to pool their wisdom and event. i am hoping that this quantity will advertise that objective by means of supplying the reader with the newest result of high-temperature superconductor study and may stimulate additional dialogue and collaboration.

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Extra info for Advances in Superconductivity VII: Proceedings of the 7th International Symposium on Superconductivity (ISS’94), November 8–11, 1994, Kitakyushu. Volume 1

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Tanaka: lpn. l. Appl. Phys. 33 (1994) L1 000. Wehler Fachbereich Physik, Universitat Wuppertal, 42097 Wuppertal, Germany *Physics Faculty, Moscow State University, 119899 Moscow, Russia ABSTRACT We have studied the I(V)-characteristics of break junctions in Y(Yb)Ba2Cu307-y single crystals. 2K a Fraunhofer-like magnetic field dependence of the critical current Ic and Fiske resonances in low magnetic fields have been observed in the I(V)-characteristic. 018. 09 nm. KEYWORDS: energy gap, Josephson effect INTRODUCTION It is well understood that hysteretic S-I-S type high-Tc superconducting (HTS) Josephson junctions could have in general several serious advantages over those junctions fabricated from conventional superconductors [ I ].

Because each coil can be designed to have a voltage say around 2000 V. which enables reducing the coil current and accordingly the loss. This type of SMES design is also effective to shift the 'energy dump limit' to higher energy side as the case of coil-subdivision. 6 Conductor The required current in conductor becomes very large for SMES which is of the order of 10kA for small scale and of the order of 100kA and sometimes up to 700 kA for large scale. On the other hand. largest current one ever manufactured is 30kA.

Te values were measured by both resistive and magnetization measurements. We also measured magnetization hysteresis using both a vibrating sample magnetometer and a SQUID magnetometer. The irreversibility field was determined by the peak temperatures in the loss part of AC susceptibility in the presence of DC field. OOIT and 1000Hz, respectively. RESULTS AND DISCUSSIONS Figure 1 shows temperature dependence of magnetization for Eu and Gd123 samples melt processed under various oxygen atmospheres.

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