Nature of Copper(II)−Lanthanide(III) Magnetic Interactions and Generation of a Large Magnetic Moment with Magnetic Anisotropy of 3d−4f Cyclic Cylindrical Tetranuclear Complexes [CuIILLnIII(hfac)2]2, (H3L = 1-(2-Hydroxybenzamido)-2-(2-hydroxy-3-methoxybenzylideneamino)ethane and Hhfac = Hexafluoroacetylacetone, LnIII= Eu, Gd, Tb, Dy)

2003 ◽  
Vol 42 (2) ◽  
pp. 398-408 ◽  
Author(s):  
Takafumi Kido ◽  
Yuichi Ikuta ◽  
Yukinari Sunatsuki ◽  
Yoshihiro Ogawa ◽  
Naohide Matsumoto ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Magnetic Moment ◽  
Magnetic Interactions ◽  
Tetranuclear Complexes ◽  
Large Magnetic Moment

Magnetic Interactions and Magnetic Anisotropy in Exchange Coupled 4f-3d Systems: A Case Study of a Heterodinuclear Ce3+-Fe3+Cyanide-Bridged Complex

2009 ◽  
Vol 15 (6) ◽  
pp. 1377-1388 ◽  
Author(s):  
Lorenzo Sorace ◽  
Claudio Sangregorio ◽  
Albert Figuerola ◽  
Cristiano Benelli ◽  
Dante Gatteschi
Keyword(s):  
Magnetic Anisotropy ◽  
Magnetic Interactions

Magnetic Properties of Fe/Ru and Fe/Ir Superlattices with Short Periodicity

1991 ◽  
Vol 232 ◽  
Author(s):  
M. Piecuch ◽  
S. Andrieu ◽  
J. F. Bobo ◽  
M. Maurer ◽  
M. F. Ravet ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Magnetic Moment ◽  
Single Crystalline ◽  
Iron Base ◽  
First Case ◽  
Short Periodicity

ABSTRACTWe present new results on the magnetic properties of constrained, iron base, good quality, single-crystalline superlattices, Fe/Ru and Fe/Ir. It is shown that in the first case there are two magnetically dead layers at the interface while in the second case there is probably none. The magnetic moment of Fe is, in both superlattices, about 1.7μb. The magnetic anisotropy are opposite, in plane for Fe/Ru, perpendicular for Fe/Ir.

scholarly journals LARGE MAGNETIC DIPOLE MOMENTS FOR NEUTRINOS WITH ARBITRARY NON-CALCULABLE MASSES

2001 ◽  
Vol 16 (25) ◽  
pp. 1605-1614 ◽  
Author(s):  
J. C. MONTERO ◽  
V. PLEITEZ
Keyword(s):  
Magnetic Dipole ◽  
Magnetic Moment ◽  
Dipole Moments ◽  
Neutral Currents ◽  
Main Ingredient ◽  
Effective Interactions ◽  
Neutrino Sector ◽  
Flavor Changing ◽  
Model Independent ◽  
Large Magnetic Moment

We show that there is a general sort of neutrino effective interactions which allows, under certain conditions, to have relatively large magnetic dipole moments for neutrinos while keeping their masses non-calculable and arbitrarily small. The main ingredient of our mechanism for generating large magnetic moment to the neutrinos is the existence of a neutral scalar which has the only role to give mass to the neutrinos or the existence of flavor changing neutral currents in the neutrino sector. Although our approach is model independent, some models in which those interactions arise are commented.

Conceptual Design of YBCO Coil With Large Magnetic Moment for Magnetic Sail Spacecraft

2013 ◽  
Vol 23 (3) ◽  
pp. 4603405-4603405 ◽  
Author(s):  
Y. Nagasaki ◽  
T. Nakamura ◽  
I. Funaki ◽  
Y. Ashida ◽  
H. Yamakawa
Keyword(s):  
Conceptual Design ◽  
Magnetic Moment ◽  
Large Magnetic Moment

Influences of Magnetic Particle-Particle Interactions on Orientational Distributions and Rheological Properties of a Semi-Dense Colloidal Dispersion Composed of Rod-Like Hematite Particles: Analysis by Means of Mean Field Approximation for an External Magnetic Field Parallel to the Angular Velocity Vector of a Simple Shear Flow

2007 ◽  
Author(s):  
Ryo Hayasaka ◽  
Masayuki Aoshima ◽  
Toshinori Suzuki ◽  
Akira Satoh
Keyword(s):  
Magnetic Field ◽  
Magnetic Moment ◽  
Mean Field ◽  
Field Approximation ◽  
Field Direction ◽  
Magnetic Interactions ◽  
Mean Field Approximation ◽  
Magnetic Field Direction ◽  
Orientational Distribution ◽  
The Magnetic Field

We have investigated mainly the influences of magnetic particle-particle interactions on orientational distributions and viscosity of a semi-dense dispersion, which is composed of rod-like particles with a magnetic moment magnetized normal to the particle axis. In addition, the influences of the magnetic field strength, shear rate, and random forces on the orientational distribution and rheological properties have been clarified. The mean field approximation has been applied to take into account magnetic interactions between rod-like particles. The basic equation of the orientational distribution function has been derived from the balance of torques and solved by the numerical analysis method. The results obtained here are summarized as follows. For a strong magnetic field, the rotational motion of the rod-like particle is restricted in a plane normal to the shearing plane because the magnetic moment of the particle is restricted in the magnetic field direction. Under circumstances of a very strong magnetic interaction between particles, the magnetic moment is strongly restricted in the magnetic field direction, so that the particle has a tendency to incline in the flow direction with the magnetic moment pointing to the magnetic field direction. For a strong shear flow, a directional characteristic of rod-like particles is enhanced, and this leads to a more significant one-peak-type distribution of the orientational distribution function. Magnetic interactions between particles do not contribute to the viscosity because the mean-field vector has only a component along the magnetic field direction.

Quasi-2D Monte Carlo Simulations of a Colloidal Dispersion Composed of Magnetic Plate-Like Particles With Magnetic Moment Normal to the Particle Axis

2008 ◽  
Author(s):  
Akira Satoh ◽  
Yasuhiro Sakuda
Keyword(s):  
Magnetic Field ◽  
Monte Carlo ◽  
Field Strength ◽  
Monte Carlo Simulations ◽  
Magnetic Field Strength ◽  
Magnetic Moment ◽  
Colloidal Dispersion ◽  
Magnetic Interactions ◽  
The Magnetic Field ◽  
Aggregation Phenomena

We have investigated aggregation phenomena of a colloidal dispersion composed of magnetic plate-like particles by means of Monte Carlo simulations. Such plate-like particles have been modeled as disk-like particles which have a magnetic moment normal to the particle axis at the particle center, with the section shape of a spherocylinder. The main objective of the present study is to clarify the influences of magnetic field strength and magnetic interactions between particles on particle aggregation phenomena. We have concentrated our attention on a quasi-2D system from an application point of view such as development of surface changing technology using such magnetic plate-like particles. A magnetic field was applied along a direction perpendicular to the plane of the monolayer. Internal structures of particle aggregates have been discussed quantitatively in terms of radial distribution and orientational pair correlation functions. The main results obtained here are summarized as follows. For the case of strong magnetic interactions between particles, the particles form long column-like clusters with their magnetic moments alternating in direction between the neighboring particles. These tendencies appear under circumstances of a weak applied magnetic field. However, as the magnetic field strength increases, the particles incline toward the magnetic field direction, so that the particles do not form such clusters.

scholarly journals Determination of Dy Substitution Site in Nd2-xDyxFe14B by HAADF-STEM and Illustration of Magnetic Anisotropy of “g” and “f” Sites, Before and After Substitution

2021 ◽  
Author(s):  
Young Kang ◽  
Syed Haider ◽  
Min-Chul Kang ◽  
Jisang Hong ◽  
Cheol-Woong Yang ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Magnetic Anisotropy ◽  
Transmission Electron Microscope ◽  
Magnetic Moment ◽  
Scanning Transmission Electron Microscope ◽  
Dark Field ◽  
Product Analysis ◽  
Scanning Transmission Electron ◽  
Transmission Electron ◽  
Scanning Transmission

Abstract Nd2Fe14B and Nd2 − xDyxFe14B (x = 0.25,0.50) particles were prepared by the modified co-precipitation followed by reduction-diffusion process. Bright field scanning transmission electron microscope (BF-STEM) image revealed the formation of Nd-Fe-B trigonal prisms in [-101] viewing zone axis, confirming the formation of Nd2Fe14B/Nd2 − xDyxFe14B. Accurate site for the Dy substitution in Nd2Fe14B crystal structure was determined as “f” site by using high-angle annular dark field scanning transmission electron microscope (HAADF-STEM). It was found that all the “g” sites are occupied by the Nd, where’s and Dy occupied only the “f” site. Anti-ferromagnetic coupling at “f” site decreased the magnetic moment values for Nd1.75Dy0.25Fe14B (23.48 µB) and Nd1.5Dy0.5Fe14B (21.03 µB) as compared to Nd2Fe14B (25.50 µB). Reduction of magnetic moment increased the squareness ratio, coercivity and energy product. Analysis of magnetic anisotropy at constant magnetic field confirmed that “f” site substitution did not change the patterns of the anisotropy. Furthermore, magnetic moment of Nd2Fe14B, Nd2 − xDyxFe14B, Nd (“f” site), Nd (“g” site) and Dy (“f” site) was recorded for all angles between 0-180o.

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