II Tip süperiletkenlerde manyetik kaldırma kuvveti için karşılaştırmalı inceleme

Year 2017, , 1293 - 1299, 01.12.2017

İbrahim Karaca

https://doi.org/10.16984/saufenbilder.273930

Abstract

Meissner
etkisi, 1933'te Meissner ve Ochsenfeld tarafından keşfedildiğinden beri sıfır
direncin yanı sıra elbette bir süperiletkenin önemli bir özelliğidir.
Deneylerle, bir süper iletken içindeki manyetik alanın daima sıfır olduğunu
gösterdiler. Bu, süper iletkeni mükemmel diamanyetik bir malzeme olarak
düşünebileceğimizi ima eder. YBa₂Cu₃O₇, Bi₂Sr₂Ca₂Cu₃O₁₀
ve HgBa₂Ca₂Cu₃O₈ gibi tip-II
(Yüksek sıcaklık) süperiletkenleri teknolojik uygulamaları için oldukça
caziptir. Önemli bir özellik levitation kuvveti ve MagLev uygulamasıdır.
Nakliye ve diğer uygulamalarda MagLev sistemleri çok önemli hale gelmiştir. Bu
uygulamalar, kriyojen transfer hattının enerji açısından verimli bir
prototipinden uzay enerji depolama sistemlerine kadar değişmektedir. Bu
çalışmada, BSCCO ve YBCO süperiletkenlerinin manyetik kaldırma kuvveti etkisini
karşılaştırdık. Sonuçlar, BSCCO süper iletken ailesinin YBCO süper
iletkenlerine kıyasla levitasyon kuvvetinde çok zayıf olduğunu gösterdi. YBCO
ailesindeki süperiletkenlerin, akı sabitlemesi ve yüksek mıknatıslanma
davranışı durumunda ortaya çıkan yüksek kritik akım yoğunluğuna sahip olduğu
düşünülür.

Keywords

Seramik, Süperiletken, BSCCO, YBCO, Kaldırma Kuvveti, MagLev

A comparatıve study for magnetıc levıtatıon force in Type-ıı superconductors

Abstract

Meissner Effect is, of course, an essential characteristic of
a superconductor besides the zero resistivity since the discovery by Meissner
and Ochsenfeld in 1933. They showed by experiment that the magnetic field
inside a superconductor is always zero. This implies that we can think of a
superconductor as being a perfectly diamagnetic material. It is highly
attractive for the technological applications of the type-II (High temperature)
superconductors as YBa2Cu3O7, Bi2Sr2Ca2Cu3O10 and HgBa2Ca2Cu3O8. One important
property is the levitation force and its MagLev application. MagLev systems
have become very important in the transportation and other applications. These
applications are ranging from in an energy efficient prototype of a cryogen
transfer line to in space energy storage systems. In this study, we compared
that the effect of magnetic levitation force BSCCO and YBCO superconductors.
The results were showed that the BSCCO superconductor’s family is very poor in
case of the levitation force compared with the YBCO superconductors. It may be
attributed that the YBCO family superconductors have the high critical current
density which occurs in the case of the flux pinning and the high magnetization
behavior.

Keywords

Ceramic; Superconductor; BSCCO; YBCO; Levitation Force; Maglev.

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