Magnetic Anisotropy in the Radula of Chiton

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Published under licence by IOP Publishing Ltd
, , Citation Zhao Jian-Gao et al 2000 Chinese Phys. Lett. 17 542 DOI 10.1088/0256-307X/17/7/029

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1 State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080

2 Department of Bio-chemistry, Yantai University, Yantai 264005

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  1. Received 13 October 1999
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0256-307X/17/7/542

Abstract

Radular teeth of chitons were studied by using magnetic torque-meter and transmission electron microscopy (TEM). The magnetic torque curves give clear evidence of presence of strong uni-axial magnetic anisotropy. The easy axis is along the length direction of tongue-like radula. The TEM pattern shows that long chip-like magnetite nano-scaled particles packed in the radular teeth with both uni-axial shape anisotropy and magneto-crystalline anisotropy.

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