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The magnetic field induced rearrangement of the cycloidal spin structure in ferroelectric mono-domain single crystals of the room-temperature multiferroic BiFeO$_3$ is studied using small-angle neutron scattering (SANS). The cycloid…

Strongly Correlated Electrons · Physics 2018-04-11 S. Bordács , D. G. Farkas , J. S. White , R. Cubitt , L. DeBeer-Schmitt , T. Ito , I. Kézsmárki

Our results describe an unprecedented example of change in the mechanism of magnetically-induced electric polarization from spin current to spin-dependent p-d hybridization model. We have followed the evolution of the magnetic structures of…

Neutron diffraction with static and pulsed magnetic fields is used to directly probe the magnetic structures in LiNiPO$_4$ up to 25T and 42T, respectively. By combining these results with magnetometry and electric polarization measurements…

In the quest to develop spintronic logic, it was discovered that magnetoelectric switching results in lower energy and shorter switching time than other mechanisms. Magnetoelectric (ME) field due to exchange bias at the interface with a…

Mesoscale and Nanoscale Physics · Physics 2017-09-22 Dmitri E. Nikonov , Sasikanth Manipatruni , Ian A. Young

The effects of high magnetic fields applied perpendicular to the spontaneous ferroelectric polarization on single crystals of BiFeO$_3$ were investigated through magnetization, magnetostriction, and neutron diffraction measurements. The…

Composite multiferroics, heterostructures of ferromagnetic (FM) and ferroelectric (FE) materials, are characterized by a remarkable magnetoelectric effect at the interface. Previous work has supported the ferromagnetic structure with…

Mesoscale and Nanoscale Physics · Physics 2016-04-01 Zidong Wang , Malcolm J. Grimson

LuFe2O4 exhibits multiferroicity due to charge order on a frustrated triangular lattice. We find that the magnetization of LuFe2O4 in the multiferroic state can be electrically controlled by applying voltage pulses. Depending on with or…

Strongly Correlated Electrons · Physics 2015-05-13 Chang-Hui Li , Fen Wang , Yi Liu , Xiang-Qun Zhang , Zhao-Hua Cheng , Young Sun

By using broadband linear and nonlinear dielectric spectroscopy we studied the magnetoelectric dynamics in the chiral antiferromagnet MnWO4. In the multiferroic phase the dielectric response is dominated by the dynamics of domains and…

Strongly Correlated Electrons · Physics 2014-04-25 D. Niermann , C. P. Grams , M. Schalenbach , P. Becker , L. Bohaty , J. Stein , M. Braden , J. Hemberger

We have studied the temperature dependence of crystal and magnetic structures of the Jahn-Teller distorted transition metal difluorides CrF$_2$ and CuF$_2$ by neutron powder diffraction in the temperature range 2-280 K. The lattice…

Strongly Correlated Electrons · Physics 2012-07-03 Tapan Chatterji , Thomas C. Hansen

We use symmetry analysis and first principles calculations to show that the linear magnetoelectric effect can originate from the response of orbital magnetic moments to the polar distortions induced by an applied electric field. Using…

Materials Science · Physics 2013-05-30 Andrea Scaramucci , Eric Bousquet , Michael Fechner , Maxim Mostovoy , Nicola A. Spaldin

Neutron scattering studies and measurements of the dielectric susceptibility and ferroelectric polarization P have been carried out in various magnetic fields H for single-crystal samples of the multiferroic system LiVCuO4 with quasi…

Strongly Correlated Electrons · Physics 2015-05-13 Yukio Yasui , Yutaka Naito , Kenji Sato , Taketo Moyoshi , Masatoshi Sato* , Kazuhisa Kakurai

Magnetoelectric coupling in multiferroic heterostructures can produce large lateral modulations of magnetic anisotropy enabling the imprinting of ferroelectric domains into ferromagnetic films. Exchange and magnetostatic interactions within…

Materials Science · Physics 2014-01-17 Kévin J. A. Franke , Sebastiaan van Dijken

It is shown theoretically that a giant magnetoelectric susceptibility exceeding 10^-6 s/m may be achieved in the ferromagnetic/ferroelectric epitaxial systems via the magnetization rotation induced by an electric field applied to the…

Materials Science · Physics 2009-11-13 N. A. Pertsev

A surface magnetoelectric effect is revealed by density-functional calculations that are applied to ferromagnetic Fe(001), Ni(001) and Co(0001) films in the presence of external electric field. The effect originates from spin-dependent…

We performed elastic neutron scattering measurements on the charge- and magnetically-ordered multiferroic material LuFe(2)O(4). An external electric field along the [001] direction with strength up to 20 kV/cm applied at low temperature…

Materials Science · Physics 2010-04-22 Jinsheng Wen , Guangyong Xu , Genda Gu , S. M. Shapiro

We show that room temperature resistivity of Ba0.5Sr1.5Zn2Fe12O22 single crystals increases by more than three orders of magnitude upon being subjected to optimized heat treatments. The increase in the resistivity allows the determination…

Materials Science · Physics 2010-01-11 Y S Chai , S H Chun , S Y Haam , Y S Oh , Ingyu Kim , Kee Hoon Kim

The dielectric response in a magnetic field is routinely used to probe the existence of coupled magnetic and elastic order in the multiferroics. However, here we demonstrate that magnetism is not necessary to produce a magnetocapacitance…

Disordered Systems and Neural Networks · Physics 2008-10-22 Meera M. Parish , Peter B. Littlewood

We observe a bilinear magnetic field-induced electric polarization of 50 $\mu C/m^2$ in single crystals of NiCl$_2$-4SC(NH$_2$)$_2$ (DTN). DTN forms a tetragonal structure that breaks inversion symmetry, with the highly polar thiourea…

Materials Science · Physics 2015-05-19 V. S. Zapf , F. Nasreen , F. Wolff-Fabris , A. Paduan-Filho

This letter reports our experimental results on magnetic-field-induced aftereffects in solution derived Bi4Fe2TiO12 film, in which e' decreases as much as 600 times after treated in a 5T magnetic field as that of the pristine one. The…

Materials Science · Physics 2013-01-23 L. J. Qiao , J. Lu , F. Xu , W. Y. Chu , X. Q. Ma

The magnetoelectric effect in the system $RAl_3(BO_3)_4$ ($R$ = Tb, Ho, Er, Tm) is investigated between 3 K and room temperature and at magnetic fields up to 70 kOe. We show a systematic increase of the magnetoelectric effect with…

Strongly Correlated Electrons · Physics 2015-04-27 K. -C. Liang , R. P. Chaudhury , B. Lorenz , Y. Y. Sun , L. N. Bezmaternykh , I. A. Gudim , V. L. Temerov , C. W. Chu