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Driving skyrmions in flow regime in synthetic ferrimagnets
Sougata Mallick, Yanis Sassi, Nicholas Figueiredo Prestes +11
Despite significant advances in the last decade regarding the room temperature stabilization of skyrmions or their current induced dynamics, the impact of local material inhomogene…
Magnetization reversal in FePt thin films: Experiments and simulations
Augusto Román, Agustín Lopez Pedroso, Karim Bouzehouane +6
The competition between shape and perpendicular magnetic anisotropies (PMA) in magnetic thin films gives rise to unusual magnetic behaviors. In ferromagnetic films with moderate PM…
Densely packed skyrmions stabilized at zero magnetic field by indirect exchange coupling in multilayers
Fernando Ajejas, Yanis Sassi, William Legrand +6
Room-temperature stabilization of skyrmions in magnetic multilayered systems is the result of a fine balance between different magnetic interactions namely symmetric and antisymmet…
Factors limiting ferroelectric field-effect doping in complex-oxide heterostructures
L. Bégon-Lours, V. Rouco, Qiao Qiao +12
Ferroelectric field-effect doping has emerged as a powerful approach to manipulate the ground state of correlated oxides, opening the door to a new class of field-effect devices. H…
Hybrid chiral domain walls and skyrmions in magnetic multilayers
William Legrand, Jean-Yves Chauleau, Davide Maccariello +6
Noncollinear spin textures in ferromagnetic ultrathin films are currently the subject of renewed interest since the discovery of the interfacial Dzyaloshinskii-Moriya interaction (…
Chirality in magnetic multilayers probed by the symmetry and the amplitude of dichroism in X-ray resonant magnetic scattering
J. -Y. Chauleau, W. Legrand, N. Reyren +7
Chirality in condensed matter is now a topic of the utmost importance because of its significant role in the understanding and mastering of a large variety of new fundamental physi…
Additive interfacial chiral interaction in multilayers for stabilization of small individual skyrmion at room temperature
Constance Moreau-Luchaire, Christoforos Moutafis, Nicolas Reyren +13
Facing the ever-growing demand for data storage will most probably require a new paradigm. Nanoscale magnetic skyrmions are anticipated to solve this issue as they are arguably the…
Perpendicular magnetization reversal in Pt/[Co/Ni]/Al multilayers via the Spin Hall Effect of Pt
J. -C. Rojas-Sánchez, P. Laczkowski, J. Sampaio +6
We experimentally investigate the current-induced magnetization reversal in Pt/[Co/Ni]/Al multilayers combining the anomalous Hall effect and magneto-optical Kerr effect techni…
Skyrmions at room temperature : From magnetic thin films to magnetic multilayers
C. Moreau-Luchaire, C. Moutafis, N. Reyren +12
Facing the ever-growing demand for data storage will most probably require a new paradigm. Magnetic skyrmions are anticipated to solve this issue as they are arguably the smallest…
A ferroelectric memristor
André Chanthbouala, Vincent Garcia, Ryan O. Cherifi +10
Memristors are continuously tunable resistors that emulate synapses. Conceptualized in the 1970s, they traditionally operate by voltage-induced displacements of matter, but the mec…
Unravelling the role of the interface for spin injection into organic semiconductors
Clément Barraud, Pierre Seneor, Richard Mattana +9
Whereas spintronics brings the spin degree of freedom to electronic devices, molecular/organic electronics adds the opportunity to play with the chemical versatility. Here we show…
Shear effects in lateral piezoresponse force microscopy at 180 ferroelectric domain walls
J. Guyonnet, H. Bea, F. Guy +5
In studies using piezoresponse force microscopy, we observe a non-zero lateral piezoresponse at 180 domain walls in out-of-plane polarized, c-axis-oriented tetragonal ferro…
Towards two-dimensional metallic behavior at LaAlO3/SrTiO3 interfaces
O. Copie, V. Garcia, C. Bodefeld +10
Using a low-temperature conductive-tip atomic force microscope in cross-section geometry we have characterized the local transport properties of the metallic electron gas that form…
Electron energy loss spectroscopy determination of Ti oxidation state at the (001) LaAlO3/SrTiO3 interface as a function of LaAlO3 growth conditions
Jean-Luc Maurice, Gervasi Herranz, Christian Colliex +10
At the (001) interface between the two band-insulators LaAlO3 and SrTiO3, a high-mobility electron gas may appear, which has been the object of numerous works over the last four ye…
Mechanisms of exchange bias with multiferroic BiFeO3 epitaxial thin films
H. Bea, M. Bibes, F. Ott +7
We have combined neutron scattering and piezoresponse force microscopy to study the relation between the exchange bias observed in CoFeB/BiFeO3 heterostructures and the multiferroi…
Mapping the Spatial Distribution of Charge Carriers in LaAlO3/SrTiO3 Heterostructures
M. Basletic, J. -L. Maurice, C. Carretero +7
At the interface between complex insulating oxides, novel phases with interesting properties may occur, such as the metallic state reported in the LaAlO3/SrTiO3 system. While this…
High Mobility in LaAlO3/SrTiO3 Heterostructures: Origin, Dimensionality and Perspectives
G. Herranz, M. Basletic, M. Bibes +9
We have investigated the dimensionality and origin of the magnetotransport properties of LaAlO3 films epitaxially grown on TiO2-terminated SrTiO3(001) substrates. High mobility con…
Multiferroic tunnel junctions
Martin Gajek, Manuel Bibes, Stephane Fusil +4
Multiferroics are singular materials that can display simultaneously electric and magnetic orders. Some of them can be ferroelectric and ferromagnetic and, for example, provide the…
Origin and Perspectives of High Mobility in LaAlO3/SrTiO3 Structures
G. Herranz, M. Basletic, M. Bibes +10
LaAlO3/SrTiO3 structures showing high mobility conduction have recently aroused large expectations as they might represent a major step towards the conception of all-oxide electron…
Spin injection in a single metallic nanoparticle: a step towards nanospintronics
A. Bernand-Mantel, P. Seneor, N. Lidgi +8
We have fabricated nanometer sized magnetic tunnel junctions using a new nanoindentation technique in order to study the transport properties of a single metallic nanoparticle. Cou…
Full oxide heterostructure combining a high-Tc diluted ferromagnet with a high-mobility conductor
G. Herranz, M. Basletic, M. Bibes +8
We report on the growth of heterostructures composed of layers of the high-Curie temperature ferromagnet Co-doped (La,Sr)TiO3 (Co-LSTO) with high-mobility SrTiO3 (STO) substrates p…
Electronic conductivity and structural distortion at the interface between insulators SrTiO3 and LaAlO3
J. -L. Maurice, C. Carretero, M. -J. Casanove +4
When insulator LaAlO3 is grown by epitaxy onto a TiO2-terminated {100} surface of insulator SrTiO3, the resulting system has a metallic character. This phenomenon has been associat…
Combining half-metals and multiferroics into epitaxial heterostructures for spintronics
H. Bea, M. Bibes, M. Sirena +8
We report on the growth of epitaxial bilayers of the La2/3Sr1/3MnO3 (LSMO) half-metallic ferromagnet and the BiFeO3 (BFO) multiferroic, on SrTiO3(001) by pulsed laser deposition. T…
Spinel ferrites: old materials bring new opportunities for spintronics
Ulrike Lueders, Agnes Barthelemy, Manuel Bibes +7
Over the past few years, intensive studies of ultrathin epitaxial films of perovskite oxides have often revealed exciting properties like giant magnetoresistive tunnelling and elec…