Ferromagnetism in 2212 phase Bi-Sr-Ca-Cu-O nano-superconductors

Malik A. Baqiya, Henry Widodo, Lidya Rochmawati, Darminto, Tadashi Adachi, Yoji Koike

Research output: Chapter in Book/Report/Conference proceedingChapter

11 Citations (Scopus)

Abstract

Superconductors are characterized by zero resistance and Meissner effect. At below critical temperature (Tc), these materials exhibit diamagnetic properties. On the other hand, materials in nano-crystal size have specific properties that differ from bulk state. Nanomaterials are characterized by surface effect which influences physical and chemical properties of the materials. Combining these two mayor fields, it can be obtained superconductors in nano-crystal size (below 200 nm) using simple method (called as nano-superconductors). Generally, ceramic-oxides in nano-crystal size, even in cuprate-superconductors, may have ferromagnetic behavior at room temperature. In this research, Bi and Bi,Pbbased nano-superconductors synthesized by wet mixing technique have Tc ~80 K for 2212 (Bi2Sr2CaCu2O8-δ and Bi1,6Pb0,4Sr2CaCu2O8-δ) phases. They also exhibit ferromagnetism effect and hysteresis curve although at well above Tc. This is unusual phenomenon because superconductor materials are generally diamagnetic at below Tc and paramagnetic at normal state. This phenomenon is possibly due to magnetic moments which may possibly come from oxygen vacancies of the nanoparticles surface.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
Pages260-263
Number of pages4
Edition1
DOIs
Publication statusPublished - 2011 Nov 1

Publication series

NameAIP Conference Proceedings
Number1
Volume1454
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Keywords

  • BSCCO
  • Ferromagnetism
  • Nanomaterials
  • Superconductors

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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