Search results for " Polarization"
showing 10 items of 668 documents
Adsorbates on thin iron(100) films
1995
The electronic and magnetic properties of different kinds of adsorbates on thin magnetized Fe(100) films have been investigated by means of spin resolving photoelectron spectroscopy. The study has been carried out with atomically physisorbed xenon, the molecule carbon monoxide, and metallic gold. The spin splitting of the Xe 5p signal can be explained by magnetic interactions with the final ionic hole state. By spin analysis, it could be shown that at room temperature for low exposures the adsorption of CO is dissociative and with increasing exposure additionally molecular. The Au related features for the monolayer show different line shapes in both spin channels but no splittings due to an…
Spin relaxation in Cu and Al spin conduits
2014
We study the spin relaxation in Al and Cu spin conduits embedded in non-local spin valve nanostructures. Measuring the key spin transport properties, we determine the spin and charge diffusion constants as well as the spin flip time. By varying the temperature, we find that the maximum of the non-local spin resistance change occurs at finite temperatures with a clear difference between Al and Cu. In particular, we find that the maximum of the non-local spin signal in Al is less pronounced and occurs at lower temperatures compared to Cu suggesting that the self-passivating Al surface plays a role. Having fabricated devices with both materials in identical processes, we can attribute the diff…
Muon spin relaxation studies of iron(II) spin crossover complexes
2008
A series of model iron(II) spin crossover complexes have been investigated by temperature dependent muon spin relaxation (mu SR) techniques at ISIS, UK. The thermally induced spin crossover in these materials could be monitored by following the initial asymmetry parameter, a(0), in zero-field. We established that the behavior of a(0) correlates well with the shape of the spin crossover curve derived from magnetic susceptibility measurements, whether hysteretic, smooth, or abrupt. In addition, the longitudinal field dependence of a(0) not only provides information on the nature of the muonic species but also on their interactions and respective localization in the crystal lattice. Useful ins…
Certain doping concentrations caused half-metallic graphene
2017
This work is supported by National Natural Science Foundation of China (Grant No. 21173096).
Theoretical Evaluation of [V IV (α-C 3 S 5 ) 3 ] 2– as Nuclear-Spin-Sensitive Single-Molecule Spin Transistor
2017
In a straightforward application of molecular nanospintronics to quantum computing, single-molecule spin transistors can be used to measure nuclear spin qubits. Conductance jumps accompany electronic spin flips at the so-called anticrossings between energy levels, which take place only at specific magnetic fields determined by the nuclear spin state. To date, the only molecular hardware employed for this technique has been the terbium(III) bis(phthalocyaninato) complex. Here we explore theoretically whether a similar behavior is expected for a highly stable molecular spin qubit, the vanadium tris-dithiolate complex [VIV(α-C3S5)3]2–. We consider such a molecule between two gold electrodes an…
Theoretical design of magnetic wires from acene and nanocorone derivatives
2016
Theoretical calculations on a series of molecular models based on amino derivatives of linear and cycled acenes acting as organic linkers between two copper(ii) ions have shown a wire-like magnetic behaviour, so that the intermetallic magnetic communication does not vanish when the linker becomes larger due to its polyradical nature. Hence, these models can be considered as molecular magnetic wires, which can be used as active components for molecular spintronics, where the information transport is based on spin carriers instead of the more conventional charge transport. The nature of the spin ground state along these two series of models is governed by the topology of the organic linker, i…
Ferroelectric liquid-crystalline elastomers
1994
Ferroelectric liquid crystalline polysiloxanes with high spontaneous polarization and possible applications in nonlinear optics
1990
Noncritical quadrature squeezing through spontaneous polarization symmetry breaking
2010
We discuss the possibility of generating noncritical quadrature squeezing by spontaneous polarization symmetry breaking. We first consider Type II frequency-degenerate optical parametric oscillators but discard them for a number of reasons. Then we propose a four-wave-mixing cavity, in which the polarization of the output mode is always linear but has an arbitrary orientation. We show that in such a cavity, complete noise suppression in a quadrature of the output field occurs, irrespective of the parameter values.