期刊
ADVANCED MATERIALS
卷 20, 期 23, 页码 4575-4578出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.200801455
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资金
- NSF [DMR 0742225]
- China Scholarship Council
- international Scientific Collaboration Fund of Shanghai
Cobalt nanotube arrays embedded in AAO templates are synthesized by direct electrodeposition with low current density. The nanotubes exhibit an hcp structure with the easy axis perpendicular to the tube. MFM imaging shows only a weak magnetic signal and SQUID measurements reveal sheared hysteresis for the field parallel to the tube axis. Combined with theoretical modeling, we confirm that the magnetization curls circumferentially around the tube wall in small external fields.
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