Effects of nanosize MgO additions to bulk Bi{sub 2.1}Sr{sub 1.7}CaCu{sub 2}O{sub x}.
Nanosize MgO particles were added to Bi{sub 2.1}Sr{sub 1.7}CaCu{sub 2}O{sub x} (Bi-2212) powder in various molar fractions. Bulk samples were made from the MgO/Bi-2212 and heat treated by partial-melt processing. Scanning electron microscopy and energy-dispersive X-ray spectra were used to study the phases present in the samples. The effects of the MgO additions on the flux pinning behavior as a function of magnetic field and temperature were investigated by magnetization hysteresis measurements obtained with a SQUID magnetometer and a 33 T vibrating sample magnetometer. It was found that the nanosize MgO addition did not affect Tc of Bi-2212, while significantly expanding the magnetization hysteresis loops and increasing the irreversibility field. X-ray and SEM analysis suggested that MgO is inert with respect to Bi-2212.
- Research Organization:
- Argonne National Laboratory (ANL)
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 938296
- Report Number(s):
- ANL/ET/JA-29091
- Journal Information:
- Physica C, Journal Name: Physica C Journal Issue: 3-4 ; Apr. 1, 1998 Vol. 298
- Country of Publication:
- United States
- Language:
- ENGLISH
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