Magnetic properties of Co3O4 nanoparticles mineralized in Listeria innocua Dps

被引：51
|
作者：
Resnick, D. A. [1 ]
Gilmore, K.
Idzerda, Y. U.
Klem, M. T.
Allen, M.
Douglas, T.
Arenholz, E.
Young, M.
机构：
[1] Montana State Univ, Dept Phys, Bozeman, MT 59717 USA
[2] Montana State Univ, Ctr Bioinspired Nanomat, Bozeman, MT 59717 USA
[3] Montana State Univ, Dept Chem & Biochem, Bozeman, MT 59717 USA
[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA
[5] Montana State Univ, Dept Plant Sci, Bozeman, MT 59717 USA
来源：
JOURNAL OF APPLIED PHYSICS | 2006年 / 99卷 / 08期
关键词：
D O I：
10.1063/1.2163839
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Temperature-dependent magnetic measurements are reported for 4.34 nm antiferromagnetic Co3O4 nanoparticles mineralized in the Listeria innocua Dps protein cage. ac measurements show a superparamagnetic blocking temperature of roughly 5.4 K and give an extracted anisotropy energy density of (7.6 +/- 0.4)x10(4) J/m(3). The Neel temperature for the Co3O4 nanoparticles, determined with dc magnetometry, was determined to be roughly 15 +/- 2 K. (C) 2006 American Institute of Physics.
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页数：3
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