Switch of the magnetic field effect on photon upconversion based on sensitized triplet–triplet annihilation

2016 ◽  
Vol 15 (12) ◽  
pp. 1462-1467 ◽  
Author(s):  
Hiroaki Yonemura ◽  
Yuji Naka ◽  
Mitsuhiko Nishino ◽  
Hiroshi Sakaguchi ◽  
Sunao Yamada
Keyword(s):  
Magnetic Field ◽  
Field Effect ◽  
Magnetic Field Effect ◽  
Magnetic Field Effects ◽  
Field Effects ◽  
First Time ◽  
The Magnetic Field ◽  
Triplet Triplet Annihilation

Positive magnetic field effects on photon upconversion based on sensitized triplet–triplet annihilation are observed for the first time.

scholarly journals Development of Lock-in Based Overtone Modulated MARY Spectroscopy for Detection of Weak Magnetic Field Effects

2020 ◽  
Author(s):  
Marcin Konowalczyk ◽  
Olivia Foster Vander Elst ◽  
Jonathan Storey
Keyword(s):  
Magnetic Field ◽  
Weak Magnetic Field ◽  
Field Effect ◽  
Magnetic Field Effect ◽  
Reaction Yield ◽  
Magnetic Field Effects ◽  
Detection Scheme ◽  
Natural Isotopic Abundance ◽  
Field Effects ◽  
High Modulation

Modulated magnetically altered reaction yield (ModMARY) spectroscopy is a derivative variant of fluorescence detected magnetic field effect measurement, where the applied magnetic field has both a constant and a modulated component. As in many derivative spectroscopy techniques, the signal to noise ratio scales with the magnitude of the modulation. High modulation amplitudes, however, distort the signal and can obscure small features of the measured spectrum. In order to detect weak magnetic field effects (including the low field effect) a balance of the two has to be found. In this work we look in depth at the origin of the distortion of the MARY signal by field modulation. We then present an overtone detection scheme, as well as a data analysis method which allows for correct fitting of both harmonic and overtone signals of the modulation broadened MARY data. This allows us to robustly reconstruct the underlying MARY curve at different modulation depths. To illustrate the usefulness of the technique, we show measurements and analysis of a well known magnetosensitive system of pyrene / 1,3-dicyanobenzene (Py/DCB). The measurements of first (h1) and second (h2) harmonic spectra are performed at different modulation depths for both natural isotopic abundance, and perdeuterated pyrene samples.<br>

Time Resolved Magnetic Field Effects as a Probe for Geminate Recombination

1976 ◽  
Vol 31 (5) ◽  
pp. 499-500 ◽  
Author(s):  
R. Haberkorn ◽  
M. E. Midiel-Beyerle
Keyword(s):  
Magnetic Field ◽  
Field Effect ◽  
Magnetic Field Effect ◽  
Theoretical Description ◽  
Transfer Reactions ◽  
Geminate Recombination ◽  
Magnetic Field Effects ◽  
Time Resolved ◽  
Transient Spectroscopy ◽  
The Magnetic Field

Abstract A theoretical description for the magnetic field dependence of geminate recombination as observed in transient spectroscopy of electron transfer reactions, is given and applications of this novel magnetic field effect are discussed.

scholarly journals The Origin of SO2 Afterglows as Revealed by Magnetic Field Effects

1994 ◽  
Vol 13 (3-4) ◽  
pp. 223-239 ◽  
Author(s):  
Haruo Abe
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Field Strength ◽  
Field Effect ◽  
Magnetic Field Effect ◽  
Magnetic Field Effects ◽  
Chemiluminescence Intensity ◽  
Pressure Diffusion ◽  
Strength Dependence ◽  
The Magnetic Field

The chemiluminescence intensity in the low pressure diffusion flame of the CS2 + O/N2 system was found to be considerably affected by external magnetic fields. The emitter in the flame was identified as the main emitter in the SO2 afterglow. The measurements of the field strength dependence, collisional effect, and spectral distribution of the magnetic field effect revealed the major emitter as the SO2 in the C˜ state. External magnetic fields were also found to quench fluorescence remarkably emitted from the vibronic levels just below the predissociation threshold in the C˜ state. From the observed vibrational-level, field-strength, and pressure dependences of the magnetic quenching, it became evident that the major emitter of chemiluminescence in the flame could be assigned to the SO2 molecule in the vibronic levels located at about 800 cm–1 below the predissociation threshold in the C˜ state

scholarly journals Development of Lock-in Based Overtone Modulated MARY Spectroscopy for Detection of Weak Magnetic Field Effects

2020 ◽  
Author(s):  
Marcin Konowalczyk ◽  
Olivia Foster Vander Elst ◽  
Jonathan Storey
Keyword(s):  
Magnetic Field ◽  
Weak Magnetic Field ◽  
Field Effect ◽  
Magnetic Field Effect ◽  
Reaction Yield ◽  
Magnetic Field Effects ◽  
Detection Scheme ◽  
Natural Isotopic Abundance ◽  
Field Effects ◽  
High Modulation

Modulated magnetically altered reaction yield (ModMARY) spectroscopy is a derivative variant of fluorescence detected magnetic field effect measurement, where the applied magnetic field has both a constant and a modulated component. As in many derivative spectroscopy techniques, the signal to noise ratio scales with the magnitude of the modulation. High modulation amplitudes, however, distort the signal and can obscure small features of the measured spectrum. In order to detect weak magnetic field effects (including the low field effect) a balance of the two has to be found. In this work we look in depth at the origin of the distortion of the MARY signal by field modulation. We then present an overtone detection scheme, as well as a data analysis method which allows for correct fitting of both harmonic and overtone signals of the modulation broadened MARY data. This allows us to robustly reconstruct the underlying MARY curve at different modulation depths. To illustrate the usefulness of the technique, we show measurements and analysis of a well known magnetosensitive system of pyrene / 1,3-dicyanobenzene (Py/DCB). The measurements of first (h1) and second (h2) harmonic spectra are performed at different modulation depths for both natural isotopic abundance, and perdeuterated pyrene samples.<br>

Magnetic field effects of photocarrier generation in bulk heterojunctions at low temperature

2016 ◽  
Vol 45 (42) ◽  
pp. 16616-16623 ◽  
Author(s):  
H. Tajima ◽  
Y. Nishioka ◽  
S. Sato ◽  
T. Suzuki ◽  
M. Kimata
Keyword(s):  
Magnetic Field ◽  
Experimental Investigation ◽  
Low Temperature ◽  
Field Effect ◽  
Bulk Heterojunction ◽  
Magnetic Field Effect ◽  
Magnetic Field Effects ◽  
Bulk Heterojunctions ◽  
Polymer Bulk ◽  
The Magnetic Field

We report an experimental investigation of the magnetic field effect (MFE) in polymer bulk heterojunction devices at temperatures below 10 K using photocarrier extraction by linearly increasing voltages.

MAGNETIC FIELD EFFECT ON SOUND VELOCITY AND ATTENUATION IN AN ITINERANT ELECTRON FERROMAGNET

1993 ◽  
Vol 07 (01n03) ◽  
pp. 605-608
Author(s):  
D.J. KIM ◽  
Ikuya YOSHIDA
Keyword(s):  
Magnetic Field ◽  
Electronic Structure ◽  
Numerical Calculation ◽  
Sound Velocity ◽  
Field Effect ◽  
Magnetic Field Effect ◽  
Electron Interaction ◽  
Itinerant Electron ◽  
Magnetic Field Effects ◽  
Field Effects

In this paper we present the result of a systematic numerical calculation on the temperature dependence of magnetic field effects on the velocity and attenuation constant of longitudinal acoustic sound for both T<Tc and T>Tc of an itinerant electron ferromagnet. Attributing the origin of these magnetic field effects to the change in the screening of the ion-ion interaction which is caused by a magnetic field, first we reformulate this problem in a unified way. Then we make numerical calculation with a simple model electronic density of states and see how sensitively the sign, size, and temperature variation of these magnetic field effects depend on the details of electronic structure and electron interaction. We find that these magnetic field effects can be very strongly exchange enhanced. These findings suggest the possibility of using such magnetic field effects as a probe of the electronic structure and electron interaction in an itinerant electron ferromagnet. Finally we point out that by measuring the magnetic field effect on sound velocity we can infer the effect of the electron-phonon interaction on the magnetic properties.

The Model for Calculation the Hall Effect Parameter

2004 ◽  
Vol 9 (2) ◽  
pp. 129-138
Author(s):  
J. Kleiza ◽  
V. Kleiza
Keyword(s):  
Magnetic Field ◽  
Field Effect ◽  
Magnetic Field Effect ◽  
Mapping Method ◽  
Sample Thickness ◽  
System Of Nonlinear Equations ◽  
Specific Resistivity ◽  
Conformal Mapping Method ◽  
Effect Parameter ◽  
The Magnetic Field

A method for calculating the values of specific resistivity ρ as well as the product µHB of the Hall mobility and magnetic induction on a conductive sample of an arbitrary geometric configuration with two arbitrary fitted current electrodes of nonzero length and has been proposed an grounded. During the experiment, under the constant value U of voltage and in the absence of the magnetic field effect (B = 0) on the sample, the current intensities I(0), IE(0) are measured as well as the mentioned parameters under the effect of magnetic fields B1, B2 (B1 ≠ B2), i.e.: IE(β(i)), I(β(i)), i = 1, 2. It has been proved that under the constant difference of potentials U and sample thickness d, the parameters I(0), IE(0) and IE(β(i)), I(β(i)), i = 1, 2 uniquely determines the values of the product µHB and specific resistivity ρ of the sample. Basing on the conformal mapping method and Hall’s tensor properties, a relation (a system of nonlinear equations) between the above mentioned quantities has been found.

The magnetic field effect on heat-exchange characteristics and MHD resistance of lead-bismuth eutectic flow in the TOKAMAK blanket heat-sink systems

2013 ◽  
Vol 49 (1-2) ◽  
pp. 237-248
Author(s):  
A. V. Beznosov ◽  
O. O. Novozhilova ◽  
S. Yu. Savinov ◽  
M. V. Yarmonov ◽  
R. E. Alekseev
Keyword(s):  
Magnetic Field ◽  
Heat Exchange ◽  
Heat Sink ◽  
Field Effect ◽  
Magnetic Field Effect ◽  
Lead Bismuth Eutectic ◽  
The Magnetic Field
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