Effects of nanosize MgO additions to bulk Bi2.1Sr1.7 CaCu2Ox

W. Wei; J. Schwartz; K. C. Goretta; U. Balachandran; A. Bhargava

doi:10.1016/S0921-4534(97)01889-3

Effects of nanosize MgO additions to bulk Bi_2.1Sr_1.7 CaCu₂O_x

W. Wei, J. Schwartz, K. C. Goretta, U. Balachandran, A. Bhargava

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Abstract

Nanosize MgO particles were added to Bi_2.1Sr_1.7CaCu₂O_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 T_c 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.

Original language	English (US)
Pages (from-to)	279-288
Number of pages	10
Journal	Physica C: Superconductivity and its applications
Volume	298
Issue number	3-4
DOIs	https://doi.org/10.1016/S0921-4534(97)01889-3
State	Published - Apr 1 1998

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/S0921-4534(97)01889-3

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title = "Effects of nanosize MgO additions to bulk Bi2.1Sr1.7 CaCu2Ox",

abstract = "Nanosize MgO particles were added to Bi2.1Sr1.7CaCu2Ox (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.",

author = "W. Wei and J. Schwartz and Goretta, {K. C.} and U. Balachandran and A. Bhargava",

note = "Funding Information: The authors would like to thank Christian Wolters, Kathleen M. Amm, and Sastry Pamidi for their help with VSM measurements. This work was supported by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy as part of a program to develop electric power technology, under contract W-31-109-Eng-38.",

year = "1998",

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doi = "10.1016/S0921-4534(97)01889-3",

language = "English (US)",

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pages = "279--288",

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T1 - Effects of nanosize MgO additions to bulk Bi2.1Sr1.7 CaCu2Ox

AU - Wei, W.

AU - Schwartz, J.

AU - Goretta, K. C.

AU - Balachandran, U.

AU - Bhargava, A.

N1 - Funding Information: The authors would like to thank Christian Wolters, Kathleen M. Amm, and Sastry Pamidi for their help with VSM measurements. This work was supported by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy as part of a program to develop electric power technology, under contract W-31-109-Eng-38.

PY - 1998/4/1

Y1 - 1998/4/1

N2 - Nanosize MgO particles were added to Bi2.1Sr1.7CaCu2Ox (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.

AB - Nanosize MgO particles were added to Bi2.1Sr1.7CaCu2Ox (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.

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JO - Physica C: Superconductivity and its applications

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ER -

Effects of nanosize MgO additions to bulk Bi_2.1Sr_1.7 CaCu₂O_x

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