Observation of multiple quantum transitions in magnetic nanoparticles

N. Noginova; T. Weaver; E. P. Giannelis; A. B. Bourlinos; V. A. Atsarkin; V. V. Demidov

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Observation of multiple quantum transitions in magnetic nanoparticles

机译：磁性纳米粒子中多个量子跃迁的观察

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Absorption at multiple resonance frequencies is observed in magnetic nanoparticles in strong similarity with forbidden multiple quantum transitions known for paramagnetic ions. Temperature and concentration dependences have been studied to reveal the origin of the signals. The results are discussed using a "quantization" approach, considering resonance transitions between energy levels of a giant spin corresponding to the total magnetic moment of a nanoparticle. The multiple quantum transitions are ascribed to both the effects of anisotropy and dipole-dipole interactions between nanoparticles.

机译：在磁性纳米粒子中观察到在多个共振频率处的吸收，与顺磁性离子已知的被禁止的多个量子跃迁具有高度相似性。已经研究了温度和浓度依赖性，以揭示信号的来源。使用“量化”方法讨论了结果，考虑了与纳米粒子的总磁矩相对应的巨型自旋能级之间的共振跃迁。多个量子跃迁归因于各向异性和纳米粒子之间的偶极-偶极相互作用的影响。

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《Physical review. B, Condensed Matter And Materials Physics》 |2008年第1期|p.014403.1-014403.5|共5页
作者
N. Noginova; T. Weaver; E. P. Giannelis; A. B. Bourlinos; V. A. Atsarkin; V. V. Demidov;
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中图分类固体物理学;
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Observation of multiple quantum transitions in magnetic nanoparticles

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