Karakteristik Penyusutan Rapat Arus Kritis YBa2Cu3O7-x dalam Lingkungan Medan Magnet  

Oleh:

Winatapura, Didin S. ; Adi, Wisnu Ari ; Sukirman, Engkir ; Yustinus P.

Jenis: Article from Journal - ilmiah nasional - tidak terakreditasi DIKTI
Dalam koleksi: Jurnal Sains Materi Indonesia vol. 7 no. 1 (2005), page 104.
Topik: magnetic field; critical current density; superconductor

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ112.2 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

Lihat Detail Induk

Isi artikel

The critical current density decrease characteristic of YBa2Cu3O7-x in magnetic field environment. The critical current density (Jc) decrease characteristic of the superkonduktor YBa2Cu3O7-x by melting process has been studied, The Jc calculation is done with measure magnetic moment of the sample by using of the superconducting quantum interference device (SQUID) in the external magnetic field (H) from 0 until 20 kOe at 5K and 77K. The critical temperature (Tc) of the sample is 90.6K and tha Jc at 5 K and 77K if the fitting curves are 4.0 x 104 A cm-2 and 3.3 x 104 A cm-2, respectively. And the variable constan a of the fitting curves are 3.5 and 1, respectively. The maximum pinning force (Fp max) of the sample at 5 K and 77 K are 4.2 x 10(8) Nm-3 and 2.1 x 10(8) Nm-3, respectively, From this experimen, we concluded that the Jc substance decrease along with the increasing of ecternal magnetic field H. The characteristic of decrease Jc on this magnetic field in general chime in with the phenomenon of flux creep to model J. Horvat et. al. The important factors in comprehending this Jc decrease characteristic are for example the existence of free energy Gibbs, the Lorentz force, flux creep in the vortex, the vortex current, and temperature applied.

Opini Anda

Klik untuk menuliskan opini Anda tentang koleksi ini!

Kembali