Quantum fluctuations in magnetic nanostructures

Yu.N. Barabanenkov^a, S.A. Nikitov^a, M.Yu. Barabanenkov^b
^aKotelnikov Institute of Radioengineering and Electronics of the Russian Academy of Sciences, ul. Mokhovaya 11, kor. 7, Moscow, 125009, Russian Federation
^bInstitute of Microelectronics Technology and High Purity Materials, Russian Academy of Sciences, Chernogolovka, Moscow Region, Chernogolovka, 142432, Russian Federation

The problem of quantum fluctuations in magnetic nanostructures is discussed by considering a linear chain of a finite number of atoms with the electron spins of neighboring atoms interacting via exchange as in Heisenberg's theory of ferromagnetism. Electromagnetic magnetic dipole radiation from a spin flip wave is calculated. It is shown that radiation energy flux calculations including electromagnetic field quantum fluctuations give much larger values than for the averaged field. The radiation decay due to spin interaction to the quantized electromagnetic field is estimated.

Keywords: magnetic nanostructure, electron spin, exchange interaction, spin wave, quantum fluctuations, electromagnetic field, Heitler approach
PACS: 75.30.Ds, 75.76.+j, 75.78.−n (all)
DOI: 10.3367/UFNe.2018.07.038405
URL: https://ufn.ru/en/articles/2019/1/g/
Web of Science

000462478600006
ADS NASA

2019PhyU...62...82B
Citation: Barabanenkov Yu N, Nikitov S A, Barabanenkov M Yu "Quantum fluctuations in magnetic nanostructures" Phys. Usp. 62 82–91 (2019)

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Received: 17th, October 2017, revised: 29th, June 2018, accepted: 17th, July 2018

Оригинал: Барабаненков Ю Н, Никитов С А, Барабаненков М Ю «Квантовые флуктуации в магнитных наноструктурах» УФН 189 85–94 (2019); DOI: 10.3367/UFNr.2018.07.038405