Direct Evidence of Flexomagnetoelectric Effect Revealed by Single-Molecule Spectroscopy

Micromagnetism and topological defects in magnetoelectric media

“…Both hypotheses considered in Section 3, i.e., the electric polarization induced by magnetic inhomogeneities (inhomogeneous magnetoelectric interaction) [4,43,77] and the local variation of the magnetic anisotropy induced by an inhomogeneous electric field at the site of location of the needle [21,42], make it possible to explain the basic features of the effects described in Section 2. At the same time, detection (by the single-molecule spectroscopy method) of the electric field connected with magnetic inhomogeneities in the films of iron garnets [25] counts in favor of the first mechanism. A decisive experiment which could distinguish one mechanism from another could be the direct observation of the direction of the magnetization rotation in the domain wall and its relation to the effect of the electrically induced displacement of the walls.…”

“…Finally, the spectroscopy of single molecules described in the recent article [25] may become the most precise method of measurement of magnetoelectric effects on domain walls. It makes possible studying the distribution of electric fields created by domain walls by measuring the displacement (as a result of the Stark effect) of the frequency of the emission line of the organic dibenzanthanthrene (DBATT) molecule located in a hexadecane layer applied to the surface of an irongarnet film (Fig.…”

“…(Color online.) Three methods for observing the magnetoelectric properties in iron-garnet films: (a) electromagnetooptical [23,24], (b) magnetoelectric probe [20,21], and (c) spectroscopy of single molecules [25]; a is the angle of the Faraday rotation; AC (DC) stands for the AC (DC) voltage; the red and blue colors designate the magnetic domains with opposite magnetizations. The dotted lines indicate the position of the domain wall (DW).…”

Влияние Электрического Поля На Ферромагнитный Резонанс В Плоскослоистой Магнитной Системе

“…В [26,27] численно продемонстрировано, что с помощью заряженной иглы можно перевести магнитную наночастицу в форме диска из вихревого состояния в антивихревое и обратно. Прямое наблюдение флексомагнитоэлектрического эффекта недавно проведено методом спектроскопии единичных молекул в висмутзамещенном феррите-гранате Bi : Lu 3 Fe 5 O 12 , неоднородность намагниченности которого возникала за счет близости со сверхпроводником In, находящимся в смешанном состоянии во внешнем магнитном поле [28]. Экспериментов, посвященных измерению константы флексомагнитоэлектрического эффекта, в настоящее время не существует.…”

Micromagnetism and topologic defects in magnetoelectric media

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