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We report the tunability of the exchange bias effect by the first-order metal-insulator transition (known as the Verwey transition) of Fe3O4 in CoO (5 nm)/Fe3O4 (40 nm)/MgO (001) thin film. In the vicinity of the Verwey transition, the…

Applied Physics · Physics 2018-10-02 X. H. Liu , W. Liu , Z. D. Zhang , C. F. Chang

Temperature dependent magnetometry and transport measurements on epitaxial Fe3O4 films grown on BaTiO3(100) single crystals by molecular beam epitaxy show a series of discontinuities, that are due to changes in the magnetic anisotropy…

Materials Science · Physics 2010-03-09 C. A. F. Vaz , J. Hoffman , A. -B. Posadas , C. H. Ahn

We report on the epitaxial growth of antiferromagnetic Mn2Au on a Nb(001) substrate capped with a pseudomorphic layer of gold. We observe a layer-by-layer growth by means of medium-energy electron diffraction and confirm stoichiometry and…

We report studies of exchange bias and coercivity in ferromagnetic Ni$_{81}$Fe$_{19}$ layers coupled to antiferromagnetic (AF) (0001), (11$\bar{2}$0), and (11$\bar{0}$2) $\alpha$-Fe$_2$O$_3$ layers. We show that AF spin configurations which…

Strongly Correlated Electrons · Physics 2009-11-10 Joonghoe Dho , C. W. Leung , Z. H. Barber , M. G. Blamire

Analytical expressions for the magnetoelastic anisotropy constants of cubic magnetic systems are derived for rectangular and oblique distortions originating from epitaxial growth on substrates with lower crystal symmetry. In particular, the…

Materials Science · Physics 2008-11-14 C. A. F. Vaz

Transport signatures of exchange gap opening because of magnetic proximity effect (MPE) are reported for bilayer structures of Bi2Se3 thin films on yttrium iron garnet (YIG) and thulium iron garnet (TmIG) of perpendicular magnetic…

Applied Physics · Physics 2019-07-31 S. R. Yang , Y. T. Fanchiang , C. C. Chen , C. C. Tseng , Y. C. Liu , M. X. Guo , M. Hong , S. F. Lee , J. Kwo

Binary kagome compounds TmXn (T = Mn, Fe, Co; X = Sn, Ge; m:n = 3:1, 3:2, 1:1) have garnered recent interest owing to the presence of both topological band crossings and flat bands arising from the geometry of the metal-site kagome lattice.…

We report a detailed investigation of magnetization, magnetocaloric effect and exchange bias studies on a mixed metal oxide YFe0.5Cr0.5O3 belonging to perovskite family. Our results reveal that the compound is in canted magnetic state (CMS)…

Strongly Correlated Electrons · Physics 2016-08-17 Mohit K Sharma , Karan Singh , K Mukherjee

Electron-electron interactions in topological p-n junctions consisting of vertically stacked topological insulators are investigated. n-type Bi2Te3 and p-type Sb2Te3 of varying relative thicknesses are deposited using molecular beam epitaxy…

While the electrical current manipulation of antiferromagnets (AFMs) has been demonstrated, the extent of the studied AFM materials has been limited with few systematic experiments and a poor understanding. We compare the electrical current…

Mesoscale and Nanoscale Physics · Physics 2020-07-08 T. Hajiri , H. Goto , H. Asano

In light of the rise of transition metal dichalcogenides as 2D semiconductors for device applications, band engineering becomes very important from an application point of view. In many of these materials, such as the canonical example of…

Materials Science · Physics 2026-05-14 Maciej Bazarnik , Thorsten Deilmann , Marta Przychodnia , Anika Schlenhoff

The effect of the saturation field on the magnetization reversal of FePt(L10)/FeCo/CoO/FeCo multilayer (ML) has been investigated to understand the origin of asymmetric magnetization reversal and its correlation with exchange bias (EB). In…

Materials Science · Physics 2022-08-09 Sadhana Singh , V. R. Reddy , Dileep Kumar

We present the temperature- and thickness-dependent structural and morphological evolution of strain induced transformations in highly-strained epitaxial BiFeO3 films deposited on LaAlO3 (001) substrates. Using high-resolution X-ray…

Materials Science · Physics 2015-05-30 Anoop R. Damodaran , Sungki Lee , Karthik Jambunathan , Scott MacClaren , Lane W. Martin

We report the new results of exchange bias effect in Nd_{1-x}Sr_{x}CoO_3 for x = 0.20 and 0.40, where the exchange bias phenomenon is involved with the ferrimagnetic (FI) state in a spontaneously phase separated system. The zero-field…

Strongly Correlated Electrons · Physics 2015-05-13 M. Patra , M. Thakur , S. Majumdar , S. Giri

We report resistance versus magnetic field measurements for a La0.65Sr0.35MnO3/SrTiO3/La0.65Sr0.35MnO3 tunnel junction grown by molecular-beam epitaxy, that show a large field window of extremely high tunneling magnetoresistance (TMR) at…

Mesoscale and Nanoscale Physics · Physics 2015-05-27 Robert Werner , Alexandr Yu. Petrov , Lucero Alvarez Mino , Reinhold Kleiner , Dieter Koelle , Bruce A. Davidson

The highly anisotropic resistivities in strained manganites are theoretically studied using the two-orbital double-exchange model. At the nanoscale, the anisotropic double-exchange and Jahn-Teller distortions are found to be responsible for…

Strongly Correlated Electrons · Physics 2010-07-27 Shuai Dong , Seiji Yunoki , Xiaotian Zhang , Cengiz Sen , J. -M. Liu , Elbio Dagotto

We report the generation and detection of spin-orbit torque ferromagnetic resonance (STFMR) in micropatterned epitaxial Fe/Pt bilayers grown by molecular beam epitaxy. The magnetic field dependent measurements at an in-plane magnetic field…

Superlattices built from two antiferromagnetic (AFM) charge/orbital order compounds, $Pr_{0.5}Ca_{0.5}MnO_3$ and $La_{0.5}Ca_{0.5}MnO_3$, have been studied as the thickness of $La_{0.5}Ca_{0.5}MnO_3$ ($LCMO$) varied. High structural quality…

Strongly Correlated Electrons · Physics 2009-11-11 P. Padhan , W. Prellier

Recently, an intriguing doping dependence of the exchange energies in the bilayer manganites $La_{2-2x}Sr_{1+2x}Mn_2O_7$ has been observed in the neutron scattering experiments. The intra-layer exchange only weakly changed with doping while…

Strongly Correlated Electrons · Physics 2009-11-07 G. Jackeli , N. B. Perkins

Molecular beam epitaxy (MBE) is a promising synthesis technique for both heterostructure growth and epitaxial integration of ferroelectric BaTiO3. However, a direct measurement of the remnant polarization (P_r) has not been previously…

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