Nonlinear magnetoelectric effect in multiferroic nanostructure TbCo/FeCo-AlN in high frequencyelectromagnetic field

Archive ouverte : Poster de conférence

Ignatov, Yury | Klimov, Alexey | Tiercelin, Nicolas | Preobrazhensky, Vladimir L. | Talbi, Abdelkrim | Pernod, Philippe | Nikitov, Sergey

Edité par HAL CCSD

International audience. Uniaxial TbCo/FeCo thin film intermetallic nanostructures are of interest because of their giant magnetostriction and uniaxial magnetic anisotropy that allows inducing of spin reorientation transition (SRT) by application of external magnetic field. It was shown that magnetoelectric effect can be appreciably enhanced in a composite structure near SRT [1]. High-frequency (HF) demodulation accompanied by resonant excitation of elastic vibrations was previously observed near SRT in nanostructured TbCo/FeCo giant magnetistrictive film deposited on Si substrate [2]. One can expect that the usage of ferromagnetic resonance (FMR), SRT, acoustic resonance, giant magnetostriction and a significant value of piezoelectric coefficientjointly enhance nonlinear magnetoelectric conversion in thin film structures.In the present work we report on the nonlinear resonance magnetoelectric effect induced by HF electromagnetic field in thin film composite multiferroic structure. The effect is studied in conditions of spin reorientation transition in magnetostrictive nanostructure. The results of calculations are in good agreement with the experimental data on magnetic field dependence of low-frequency (LF) magnetoelectric voltage and on HF power absorption. It is shown that conductivity contribution to FMR line width is relatively weak in magnetostrictive nanostructure. Observed unusual disappearing of the FMR line in the saturation phase, where magnetization is collinear to magnetizing field, is explained by specific geometry of the experiment and strong HF absorption. Obtained value of nonlinear magnetoelectric conversion coefficient amounts to 100 µV/mW. Calculations show for optimal orientation of anisotropy axis to the external alternating magnetic field direction increase the conversion coefficient one order of value.

Consulter en ligne

Suggestions

Du même auteur

Ultrafast manipulation of magnetic anisotropy in a uniaxial intermetallic heterostructure TbCo 2 /FeCo | Ovcharenko, Sergei

Ultrafast manipulation of magnetic anisotropy in a uniaxial intermetallic h...

Archive ouverte: Article de revue

Ovcharenko, Sergei | 2022-04-28

International audience. Abstract We study experimentally and theoretically the dynamics of spin relaxation motion excited by a femtosecond pulse in the TbCo 2 /FeCo multilayer structures with different ratios of TbC...

Polarization control of THz emission using spin-reorientation transition in spintronic heterostructure | Khusyainov, Dinar

Polarization control of THz emission using spin-reorientation transition in...

Archive ouverte: Article de revue

Khusyainov, Dinar | 2021-01-12

International audience. Polarization of electromagnetic waves plays an extremely important role in interaction of radiation with matter. In particular, interaction of polarized waves with ordered matter strongly dep...

Composite Multiferroic Terahertz Emitter: Polarization Control via an Electric Field | Khusyainov, Dinar

Composite Multiferroic Terahertz Emitter: Polarization Control via an Elect...

Archive ouverte: Article de revue

Khusyainov, Dinar | 2022-04

International audience. Electrical control of conjugate degrees of freedom in multiferroics provides the advantage of reducing energy consumption to femto- and even attojoules per switch in spintronics and memory de...

Chargement des enrichissements...