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Magneto-capacitance effect was investigated using the impedance spectroscopy on single crystals of LuFe2O4. The intrinsic impedance response could be separated from the interfacial response and showed a clear hysteresis loop below TFerri ~…

We have investigated the role of the 4$f$ moment on the magnetoelectric (ME) effect of orthorhombic $R$MnO$_{3}$ ($R$=rare earth ions). In order to clarify the role of the 4$f$ moment, we prepared three samples: (Eu,Y)MnO$_{3}$ without the…

强关联电子 · 物理学 2007-05-23 K. Noda , M. Akaki , F. Nakamura , D. Akahoshi , H. Kuwahara

Cross-correlation between magnetic and dielectric properties has been attracting renewed interest because of the fundamental as well as technological importance of controlling the electric (magnetic) polarization by an external magnetic…

强关联电子 · 物理学 2007-05-23 D. Higashiyama , N. Kida , S. Miyasaka , T. Arima , Y. Tokura

We have investigated the magnetoelectric and magnetodielectric response in FeVO$_4$, which exhibits a change in magnetic structure coincident with ferroelectric ordering at $T_{N2}$$\approx$15 K. Using symmetry considerations, we construct…

材料科学 · 物理学 2015-05-19 A. Dixit , G. Lawes , A. B. Harris

We study the magnetocapacitance (MC) effect and magnetoelectric (ME) coupling in spin-flop driven antiferromagnet Co4Ta2O9. The magnetocapacitance data at high magnetic fields are analyzed by phenomenological Ginzburg-landau theory of…

材料科学 · 物理学 2017-07-12 S. Chaudhary , P. Srivastava , S. Patnaik

We have discovered strong magnetoelectric (ME) effects in the single chiral-helical magnetic state of single-crystalline langasite Ba3NbFe3Si2O14 that is crystallographically chiral. The ferroelectric polarization, predominantly aligned…

强关联电子 · 物理学 2014-03-26 Nara Lee , Young Jai Choi , Sang-Wook Cheong

The ferrimagnetic spinel Mn3O4 exhibits large and anisotropic changes in electronic and structural properties in response to an applied magnetic field. These changes are thought to result from the field-dependent tuning---via strong…

强关联电子 · 物理学 2016-06-22 T. Byrum , S. L. Gleason , A. Thaler , G. J. MacDougall , S. L. Cooper

We explore the impact of a magnetic field on the ferroelectric domain pattern in polycrystalline hexagonal ErMnO3 at cryogenic temperatures. Utilizing piezoelectric force microscopy measurements at 1.65 K, we observe modifications of the…

材料科学 · 物理学 2024-03-21 J. Schultheiß , L. Puntigam , M. Winkler , S. Krohns , D. Meier , H. Das , D. M. Evans , I. Kézsmárki

We report the magnetic imaging of ferromagnetic domains in the van der Waals single crystal MnSb2Te4 from two different sources using cryogenic magnetic force microscopy. The magnetic field dependence of the domains reveals very weak…

材料科学 · 物理学 2021-04-07 Wenbo Ge , Paul M. Sass , Jiaqiang Yan , Seng Huat Lee , Zhiqiang Mao , Weida Wu

The dielectric properties of MnFe$_2$O$_4$ and $\gamma$-Fe$_2$O$_3$ magnetic nanoparticles embedded in insulating matrices were investigated. The samples showed frequency dependent dielectric anomalies coincident with the magnetic blocking…

材料科学 · 物理学 2007-05-23 G. Lawes , R. Tackett , O. Masala , B. Adhikary , R. Naik , R. Seshadri

Magnetoelectrics often possess ions located in noncentrosymmetric surroundings. Based on this fact we suggest a microscopic model of magnetoelectric interaction and show that the spin-orbit coupling leads to spin-dependent electric dipole…

强关联电子 · 物理学 2012-06-27 V. P. Sakhnenko , N. V. Ter-Oganessian

Magnetoelectric (ME) effect is recognized for its utility for low-power electronic devices.Largest ME coefficients are often associated with phase transitions in which ferroelectricity is induced by magnetic order. Unfortunately, in these…

We model and evaluate the Peltier and Seebeck effects in magnetic multilayer nanostructures by a finite-element theory of thermoelectric properties. We present analytical expressions for the thermopower and the current-induced temperature…

介观与纳米尺度物理 · 物理学 2009-05-21 Moosa Hatami , Gerrit E. W. Bauer , Qinfang Zhang , Paul J. Kelly

We report the observation a continuous rotation of the polarization in Mn$_{0.95}$Co$_{0.05}$WO$_{4}$ under magnetic field. At zero field, this compound shows a transition into the spiral magnetic and ferroelectric phase at 12.2K, which is…

强关联电子 · 物理学 2012-07-25 K. -C. Liang , R. P. Chaudhury , Y. Q. Wang , Y. Y. Sun , B. Lorenz , C. W. Chu

We have measured the dielectric constant and the pyroelectric current of orthorhombic (space group $Pbam$) NdCrTiO$_5$ polycrystalline samples. The dielectric constant and the pyroelectric current show features associated with ferroelectric…

材料科学 · 物理学 2015-05-30 J. Hwang , E. S. Choi , H. D. Zhou , J. Lu , P. Schlottmann

The coupling of magnetic chiralities to the ferroelectric polarisation in multiferroic RbFe(MoO$_4$)$_2$ is investigated by neutron spherical polarimetry. Because of the axiality of the crystal structure below $T_\textrm{c}$ = 190 K,…

The magnetic, thermodynamic, and pyroelectric properties of LiFeP$_2$O$_7$ single crystals are investigated with emphasis on the magnetoelectric interaction of the electrical polarization with the magnetic order parameter. The magnetic…

强关联电子 · 物理学 2012-09-13 K. -C. Liang , W. Zhang , B. Lorenz , Y. Y. Sun , P. S. Halasyamani , C. W. Chu

We experimentally demonstrate that in magnetostrictive ferrimagnetic single crystal of CoFe2O4 there is clear correlation between magnetostriction and magnetoreflection of unpolarized light in the infrared range. The influence of magnetic…

The magnetic properties of the antiferromagnetic magnetoelectric single-crystals LiCoPO4 and LiNiPO4 were investigated using the SQUID-magnetometer. The magnetization was measured in a longitudinal experimental geometry (M // H) along the…

强关联电子 · 物理学 2007-05-23 Yu. Kharchenko , N. Kharchenko , M. Baran , R. Szymczak

Zero field cooled (ZFC)/Field Cooled (FC) magnetization curves of a bulk MnO single crystal show a peculiar peak at low temperatures (~40K) similar to the low temperature peak observed in MnO nanoparticles. In order to investigate the…

材料科学 · 物理学 2017-08-02 X. Sun , E. Feng , Y. Su , K. Nemkovski , O. Petracic , T. Brückel