scholarly journals Связанные магнитостатические электронно-ядерные колебания в магнитных материалах

2019 ◽  
Vol 61 (1) ◽  
pp. 62
Author(s):  
М.А. Борич ◽  
С.П. Савченко ◽  
А.П. Танкеев
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Fields ◽  
Field Strength ◽  
External Field ◽  
Field Dependence ◽  
Shape Parameters ◽  
Sample Shape ◽  
Forbidden Region ◽  
Magnetostatic Modes

AbstractMagnetization dynamics in spheroidal ferromagnetic samples is studied theoretically. It is shown that, in a magnetostatic approximation, electronic-nuclear magnetostatic modes with a discrete spectrum of eigen oscillations exist in such samples. The structure and the field dependence of the frequencies of these oscillations are substantially dependent on the parameter of the spheroid shape that is the ratio of it’s axes and also on the external magnetic field value. In a certain region of values of these parameters, the dependence of the eigenfrequencies of the system on them becomes nontrivial. The external field strength and the sample shape determine not only the eigenfrequencies in the system, but also the number of the eigenmodes. In addition, for each of the eigenmodes, there exists a “forbidden” region of magnetic fields and shape parameters in which this mode cannot be observed.

Magnetic Field Dependence of Molecular Quantum Beat: Biacetyl

1980 ◽  
Vol 35 (11) ◽  
pp. 1271-1272 ◽  
Author(s):  
W. Henke ◽  
H. L. Selzle ◽  
T. R. Hays ◽  
E. W. Schlag
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Fields ◽  
Electronic State ◽  
Field Dependence ◽  
Magnetic Field Dependence ◽  
Laser Excitation ◽  
Quantum Beat ◽  
Narrow Bandwidth ◽  
Hypersonic Jet

Abstract The effect of an external magnetic field on the decay of an excited single rotational state of the 1Au electronic state of biacetyl is observed in a hypersonic jet experiment after narrow bandwidth laser excitation. The lifetime of the ex-cited state decreases already at low magnetic fields and the molecular quantum beat vanishes.

Rotational structure of triplet–singlet transitions in orthorhombic molecules in intermediate and high magnetic fields

1977 ◽  
Vol 55 (12) ◽  
pp. 1066-1073 ◽  
Author(s):  
C. di Lauro ◽  
E. Perri
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Fields ◽  
External Field ◽  
Triplet State ◽  
Rotational Structure ◽  
High Magnetic Fields ◽  
Zero Field ◽  
High Fields

The Zeeman band profiles are calculated for near-case (b) triplet–singlet transitions in asymmetric rotors, making allowance for the intensity perturbations induced by an external magnetic field. It is shown that new bands correlating with zero-field forbidden lines can be observed under the effect of sufficiently high fields. Band profiles and the patterns of the magnetic sublevels of the triplet state split by the external field are discussed in detail for the Paschen–Back limit.

scholarly journals Осцилляции де Гааза--ван Альфена в кремниевой наноструктуре в слабых магнитных полях при комнатной температуре

2019 ◽  
Vol 53 (12) ◽  
pp. 1647
Author(s):  
В.В. Романов ◽  
В.А. Кожевников ◽  
C.T. Tracey ◽  
Н.Т. Баграев
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Fields ◽  
Field Dependence ◽  
Room Temperature ◽  
Weak Magnetic Fields ◽  
Effective Carrier

AbstractThe field dependence of magnetization of a silicon nanosandwich measured at room temperature in weak magnetic fields manifests de Haas–van Alphen oscillations, the behavior of which is explained under the condition of the dependence of the effective carrier mass on the external magnetic field.

scholarly journals Compensation Temperature of a Mixed Ising Ferrimagnetic Model in the Presence of External Magnetic Fields

1998 ◽  
Vol 517 ◽  
Author(s):  
G. M. Buendia ◽  
E. Machado ◽  
M. A. Novotny
Keyword(s):  
Magnetic Field ◽  
Monte Carlo ◽  
External Magnetic Field ◽  
Magnetic Fields ◽  
External Field ◽  
Monte Carlo Methods ◽  
Nearest Neighbor ◽  
Narrow Range ◽  
Compensation Temperature ◽  
Square Lattice

AbstractThe behavior of the compensation temperature of a mixed Ising ferrimagnetic system on a square lattice in which the two interpenetrating square sublattices have spins σ (±1/2) and spins S (±1,0) has been studied with Monte Carlo methods. Our model includes nearest and next-nearest neighbor interactions, a crystal field and an external magnetic field. This model is relevant for understanding bimetallic molecular ferrimagnetic materials. We found that there is a narrow range of parameters of the Hamiltonian for which the model has compensation temperatures and that the compensation point exists only for small values of the external field.

EXTERNAL FIELDS AND THE RENORMALIZATION GROUP

1988 ◽  
Vol 03 (07) ◽  
pp. 661-666
Author(s):  
T. E. CLARK ◽  
S. T. LOVE
Keyword(s):  
Magnetic Field ◽  
Renormalization Group ◽  
External Magnetic Field ◽  
External Field ◽  
Field Dependence ◽  
Effective Action ◽  
Renormalization Group Equation ◽  
The Other ◽  
Group Equation ◽  
Scaling Arguments

Scaling arguments are used to relate the external field dependence of the vacuum functional to the changes in the other parameters characterizing the model. Under certain circumstances, this renormalization group equation can be solved, at least approximately, for the external field dependence of the effective action. In particular, we focus on the case of a strong external magnetic field.

Effect of external magnetic field on lane formation in driven pair-ion plasmas

2021 ◽  
Vol 87 (2) ◽  
Author(s):  
Swati Baruah ◽  
U. Sarma ◽  
R. Ganesh
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Coupling Parameter ◽  
Critical Parameters ◽  
Coulomb Coupling ◽  
Lane Formation ◽  
Parameter Values

Lane formation dynamics in externally driven pair-ion plasma (PIP) particles is studied in the presence of external magnetic field using Langevin dynamics (LD) simulation. The phase diagram obtained distinguishing the no-lane and lane states is systematically determined from a study of various Coulomb coupling parameter values. A peculiar lane formation-disintegration parameter space is identified; lane formation area extended to a wide range of Coulomb coupling parameter values is observed before disappearing to a mixed phase. The different phases are identified by calculating the order parameter. This and the critical parameters are calculated directly from LD simulation. The critical electric field strength value above which the lanes are formed distinctly is obtained, and it is observed that in the presence of the external magnetic field, the PIP system requires a higher value of the electric field strength to enter into the lane formation state than that in the absence of the magnetic field. We further find out the critical value of electric field frequency beyond which the system exhibits a transition back to the disordered state and this critical frequency is found as an increasing function of the electric field strength in the presence of an external magnetic field. The movement of the lanes is also observed in a direction perpendicular to that of the applied electric and magnetic field directions, which reveals the existence of the electric field drift in the system under study. We also use an oblique force field as the external driving force, both in the presence and absence of the external magnetic field. The application of this oblique force changes the orientation of the lane structures for different applied oblique angle values.

scholarly journals The influence of an external magnetic field on the dynamics of magnetite reduction with hydrogen

RSC Advances ◽  
2021 ◽  
Vol 11 (25) ◽  
pp. 15422-15427
Author(s):  
Petr A. Chernavsky ◽  
Nellie V. Kim ◽  
Victor A. Andrianov ◽  
Yurii D. Perfiliev ◽  
Alla A. Novakova ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Fields ◽  
Hydrogen Reduction ◽  
Kinetics Of

The kinetics of hydrogen reduction of magnetite was investigated in different magnetic fields.

scholarly journals Sensitivity of PS/CoPd Janus particles to an external magnetic field

RSC Advances ◽  
2021 ◽  
Vol 11 (28) ◽  
pp. 17051-17057
Author(s):  
Anna Eichler-Volf ◽  
Yara Alsaadawi ◽  
Fernando Vazquez Luna ◽  
Qaiser Ali Khan ◽  
Simon Stierle ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
External Magnetic Field ◽  
Magnetic Fields ◽  
Janus Particles ◽  
Weak Magnetic Fields

PS/CoPd Janus particles respond very sensitively to application of low external magnetic fields. Owing to the magnetic properties, the PS/CoPd particles may be used, for example, to sense the presence of weak magnetic fields as micro-magnetometers.

Flow Visualization by Means of Contactless Inductive Flow Tomography in the Presence of a Magnetic Brake

2015 ◽  
Vol 15 (1) ◽  
pp. 41-48 ◽  
Author(s):  
Matthias Ratajczak ◽  
Thomas Wondrak ◽  
Klaus Timmel ◽  
Frank Stefani ◽  
Sven Eckert
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Fields ◽  
Flow Field ◽  
Continuous Casting ◽  
Flow Structure ◽  
Cross Section ◽  
Two Dimensional ◽  
Slab Casting ◽  
Two Dimensional Flow

AbstractIn continuous casting DC magnetic fields perpendicular to the wide faces of the mold are used to control the flow in the mold. Especially in this case, even a rough knowledge of the flow structure in the mold would be highly desirable. The contactless inductive flow tomography (CIFT) allows to reconstruct the dominating two-dimensional flow structure in a slab casting mold by applying one external magnetic field and by measuring the flow-induced magnetic fields outside the mold. For a physical model of a mold with a cross section of 140 mm×35 mm we present preliminary measurements of the flow field in the mold in the presence of a magnetic brake. In addition, we show first reconstructions of the flow field in a mold with the cross section of 400 mm×100 mm demonstrating the upward scalability of CIFT.

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