TY - JOUR
T1 - Crystal growth of Bi-2201 phase in high magnetic fields
AU - Lu, X. Y.
AU - Nagata, A.
AU - Watanabe, K.
AU - Nojima, T.
AU - Sugawara, K.
AU - Kamada, S.
N1 - Funding Information:
This work was supported by Grand-in-Aid for Scientific Research from Japan Society for the Promotion of Science. The authors thank the Akita Prefectural Industrial Technology Center for the performance of the SEM/EDX measurements.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2002/10/15
Y1 - 2002/10/15
N2 - The crystal growth of Bi-2201 phase during partial-melting and solidification in high magnetic fields was reported. Thin crystals (∼20 μm) with a size of 5-10 mm2 exist only in the surface layers of samples treated in zero magnetic field. Whereas thick crystals (∼100 μm) exist not only on the surface, but also in the center of samples treated in 8 T magnetic fiel. Tc of Bi-2201 phase treated in 0 T is higher than that treated in 8 T. Bi-2201 phase and Bi-2212 phase coexist in the sample treated in 0 T, whereas only Bi-2201 phase exists in the sample treated in 8 T. For the sample treated in 8 T magnetic field, a clear second peak structure was observed in the magnetic hysteresis loop in the direction Hm∥Ha at 5 K, and the width of the hysteresis loop ΔM at 5 K and 0 T in the direction Hm∥Ha is about 10 times as large as that in the direction Hm⊥Ha, indicating that for this sample an obvious anisotropy exists and the Bi-2201 grains align with their c-axes parallel to Ha.
AB - The crystal growth of Bi-2201 phase during partial-melting and solidification in high magnetic fields was reported. Thin crystals (∼20 μm) with a size of 5-10 mm2 exist only in the surface layers of samples treated in zero magnetic field. Whereas thick crystals (∼100 μm) exist not only on the surface, but also in the center of samples treated in 8 T magnetic fiel. Tc of Bi-2201 phase treated in 0 T is higher than that treated in 8 T. Bi-2201 phase and Bi-2212 phase coexist in the sample treated in 0 T, whereas only Bi-2201 phase exists in the sample treated in 8 T. For the sample treated in 8 T magnetic field, a clear second peak structure was observed in the magnetic hysteresis loop in the direction Hm∥Ha at 5 K, and the width of the hysteresis loop ΔM at 5 K and 0 T in the direction Hm∥Ha is about 10 times as large as that in the direction Hm⊥Ha, indicating that for this sample an obvious anisotropy exists and the Bi-2201 grains align with their c-axes parallel to Ha.
KW - Bi-2201
KW - Magnetic field melt growth process
KW - Texture
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U2 - 10.1016/S0921-4534(02)01191-7
DO - 10.1016/S0921-4534(02)01191-7
M3 - Article
AN - SCOPUS:0037107857
VL - 382
SP - 27
EP - 32
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 1
ER -