Intrinsic Magnetism and Collective Magnetic Properties of Size-Selected Nanoparticles
Intrinsic Magnetism and Collective Magnetic Properties of Size-Selected Nanoparticles
复制标题
尺寸选择的纳米粒子的固有磁性和集体磁性
DOI:
10.1007/978-3-642-28546-2_11
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
H. Wende
中科院分区:
文献类型:
--
作者:
C. Antoniak;N. Friedenberger;A. Trunova;R. Meckenstock;F. Kronast;K. Fauth;M. Farle;H. Wende
Using size-selected spherical FePt nanoparticles and cubic Fe/Fe-oxide nanoparticles as examples, we discuss the recent progress in the determination of static and dynamic properties of nanomagnets. Synchroton radiation-based characterisation techniques in combination with detailed structural, chemical and morphological investigations by transmission and scanning electron microscopy allow the quantitative correlation between element-specific magnetic response and spin structure on the one hand and shape, crystal and electronic structure of the particles on the other hand. Examples of measurements of element-specific hysteresis loops of single 18 nm sized nanocubes are discussed. Magnetic anisotropy of superparamagnetic ensembles and their dynamic magnetic response are investigated by ferromagnetic resonance as a function of temperature at different microwave frequencies. Such investigations allow the determination of the magnetic relaxation and the extraction of the average magnetic anisotropy energy density of the individual particles.
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DOI:
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发表时间:
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期刊:
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