Publications (15)
Switching friction at a manganite surface using electric fields
H. Schmidt, J. -O. Krisponeit, N. Weber +2
We report active control of the friction force at the contact between a nanoscale asperity and a LaCaMnO (LCMO) thin film using electric fields. We use fricti…
Direct imaging of lattice strain-induced stripe phases in an optimally-doped manganite
L. Sudheendra, V. Moshnyaga, B. Damaschke +1
In a manganite film without quenched disorder, we show texturing in the form of insulating and metallic stripes above and below Curie temperature (Tc), respectively, by high resolu…
Amorphous thin film growth: theory compared with experiment
M. Raible, S. G. Mayr, S. J. Linz +3
Experimental results on amorphous ZrAlCu thin film growth and the dynamics of the surface morphology as predicted from a minimal nonlinear stochastic deposition equation are analys…
Spin-lattice relaxation phenomena in manganite La0.7Sr0.3MnO3 thin films
M. C. Weber, B. Hillebrands, V. Moshnyaga +1
Time-resolved magneto-optics was used to study spin-lattice relaxation dynamics in thin epitaxial La0.7Sr0.3MnO3 films. Two distinct recovery regimes of the ferromagnetic order can…
Stress-strain relations in bulk metallic glasses and colloidal dispersions
C. P. Amann, M. Ballauff, S. U. Egelhaaf +9
A comparison is made between the nonlinear rheological response of bulk metallic glass formers and of colloidal dispersions. Stress-strain curves measured after switch-on of consta…
Dependence of Magnetic Anisotropy and Magnetoresistance of Ni81Fe19-Films on Annealing
T. Lorenz, A. Kaeufler, Y. Luo +2
Permalloy (Py:Ni81Fe19) exhibits an anisotropic magnetoresistance (AMR) which is very often used to read magnetic signals from storage devices. Py-films of thickness 20nm were prep…
Memristor Behaviour in Nano-Sized Vertical Lsmo/Lsmo Tunnel Junctions
V. Moshnyaga, M. Esseling, L. Sudheendra +4
We report a memory resistance (memristor) behavior with nonlinear current-voltage characteristics and bipolar hysteretic resistance switching in the nanocolumnar manganite (LSMO) f…
Intrinsic Inhomogeneities in Manganite Thin Films Investigated with Scanning Tunneling Spectroscopy
T. Becker, C. Streng, Y. Luo +4
Thin films of La0.7Sr0.3MnO3 on MgO show a metal insulator transition and colossal magnetoresistance. The shape of this transition can be explained by intrinsic spatial inhomogenei…
Thermal expansion and the glass transition
P. Lunkenheimer, A. Loidl, B. Riechers +2
Melting is well understood in terms of the Lindemann criterion, essentially stating that crystalline materials melt when the thermal vibrations of their atoms become such vigorous…
STS study of the CMR effect of a manganite thin film in an external magnetic field
B. Damaschke, T. Mildner, V. Moshnyaga +1
A La0.75Ca0.25MnO3-film grown by metalorganic aerosol deposition technique was investigated by scanning tunnelling microscopy and spectroscopy. A small spot was found on the surfac…
Interface controlled electronic variations in correlated heterostructures
K. Gehrke, V. Moshnyaga, O. I. Lebedev +3
An interface modification of LCMO-BTO superlattices was found to massively influence magnetic and magnetotransport properties. Moreover it determines the crystal structure of the m…
Crystal melting influenced by particle cooperativity of the liquid
P. Lunkenheimer, K. Samwer, A. Loidl
Recently, a universal relation between the thermal expansion coefficient of glasses , their glass-transition temperature Tg, and the so-called fragility index m of the corres…
Disentangling interatomic repulsion and anharmonicity in the viscosity and fragility of glasses
J. Krausser, A. Lagogianni, K. Samwer +1
Within the shoving model of the glass transition, the relaxation time and the viscosity are related to the local cage rigidity. This approach can be extended down to the atomic-lev…
Thin-film based phase plates for transmission electron microscopy fabricated from metallic glasses
M. Dries, S. Hettler, T. Schulze +6
Thin-film based phase plates are meanwhile a widespread tool to enhance the contrast of weak-phase objects in transmission electron microscopy (TEM). The thin film usually consists…
A-site Ordering versus Electronic Inhomogeneity in CMR-Manganite Films
V. Moshnyaga, L. Sudheendra, O. I. Lebedev +7
Epitaxial La3/4Ca1/4MnO3/MgO(100) (LCMO) thin films show unusual rhombohedral (R-3c) structure with a new perovskite superstructure due to unique ordering of La and Ca at the A-sit…