scholarly journals Quadrupole Excitations in Magnetic Susceptibility of Magnetic Nanoparticle Fe8

2015 ◽  
Vol 2015 ◽  
pp. 1-4
Author(s):  
Yousef Yousefi
Keyword(s):  
Experimental Data ◽  
Magnetic Susceptibility ◽  
Magnetic Fields ◽  
Magnetic Nanoparticle

Magnetic susceptibility dependence on temperatures in different magnetic fields will be discussed. Until today, to calculate magnetization and magnetic susceptibility, only dipole excitations have been considered, but, due to the symmetry of operators in Hamiltonian and also to achieve more accuracy, other multiple excitations must be taken into account too. To this end, here, both dipole and quadruple excitations are considered and then the resulting curves will be plotted in presence of different magnetic fields. Finally, seen that the graphs obtained using the multipole excitations more accurately with results taken by experimental data.

Interplay between spin crossover and exchange interaction in iron(III) complexes

2009 ◽  
Vol 81 (8) ◽  
pp. 1357-1383 ◽  
Author(s):  
Roman Boča ◽  
Ivan Nemec ◽  
Ivan Šalitroš ◽  
Ján Pavlik ◽  
Radovan Herchel ◽  
...  
Keyword(s):  
Experimental Data ◽  
Magnetic Susceptibility ◽  
Exchange Interaction ◽  
Spin Crossover ◽  
Magnetic Measurements ◽  
Spin States ◽  
Magnetic Exchange Interaction ◽  
Magnetic Exchange ◽  
Simultaneous Fitting ◽  
Polynuclear Metal Complexes

In the dinuclear and polynuclear metal complexes exhibiting the low-spin (LS) to high-spin (HS) transition, the spin-crossover phenomenon interferes with the magnetic exchange interaction. The latter manifests itself in forming spin-multiplets, which causes a possible overlap of the band originating in different reference spin states (LL, LH, HL, and HH). A series of dinuclear Fe(III) complexes has been prepared; the iron centers are linked by a bidentate bridge (CN-, and diamagnetic metallacyanates {Fe(CN)5(NO)}, {Ni(CN)4}, {Pt(CN)4}, and {Ag(CN)2}). Magnetic measurements confirm that the spin crossover proceeds on the thermal propagation. This information has been completed also by the Mössbauer spectral (MS) data. A theoretical model has been developed that allows a simultaneous fitting of all available experimental data (magnetic susceptibility, magnetization, HS mole fraction) on a common set of parameters.

Magnetic susceptibility of an organosilicon based magnetic fluid in electric and magnetic fields

2015 ◽  
Vol 41 (2) ◽  
pp. 200-202
Author(s):  
Yu. I. Dikanskii ◽  
D. V. Gladkikh ◽  
S. A. Kunikin ◽  
A. V. Radionov
Keyword(s):  
Magnetic Susceptibility ◽  
Magnetic Fields ◽  
Magnetic Fluid ◽  
Electric And Magnetic Fields

scholarly journals Effect of a Dc Oblique Magnetic Field on the Magnetic Susceptibility of the Super-Paramagnetics Nanoparticles in Very Low Damping

2020 ◽  
pp. 1-3
Author(s):  
Malika MADANI ◽  
◽  
Bachir OUARI ◽  
Keyword(s):  
Magnetic Susceptibility ◽  
Magnetic Fields ◽  
Transverse Relaxation ◽  
Damping Parameter ◽  
Complex Susceptibility ◽  
Relaxation Modes ◽  
Oblique Field ◽  
Arbitrary Amplitude ◽  
Matrix Continued Fraction ◽  
Oblique Magnetic Field

The Magnetic Susceptibility of an individual Super-Paramagnetic nanoparticle in a presence of DC Oblique magnetic fields of arbitrary amplitude is investigated using Brown’s continuous diffusion model. The susceptibility is calculated and compared when for extensive ranges of the anisotropy, the dc magnetic fields in the very low damping with Matrix continued Fraction. It is shown that the shape of the Spectrum of Super-Paramagnetic nanoparticles is substantially altered by applying a dc oblique field. There is also an inherent geometric dependence of the complex susceptibility on the damping parameter arising from coupling of longitudinal and transverse relaxation modes

Interplay Of Superconductivity And Magnetic Excitations In Multiorbital Systems

2015 ◽  
Vol 10 (2) ◽  
pp. 83-90
Author(s):  
Maxim Korshunov ◽  
Yuliya Togushova
Keyword(s):  
Experimental Data ◽  
Magnetic Susceptibility ◽  
Order Parameter ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Resonance Peak ◽  
Superconducting Order Parameter ◽  
Spin Resonance ◽  
Iron Based ◽  
The Impact

We have considered the impact of the nontrivial superconducting order parameter on the magnetic susceptibility within the multiorbital model for the iron-based materials. The formation of the spin-resonance peak is demonstrated and its connection to the experimental data on the inelastic neutron scattering is discussed.

scholarly journals Magnetische Widerstandsänderung von Kupfer-und Silber-Einkristallen

1969 ◽  
Vol 24 (6) ◽  
pp. 922-929 ◽  
Author(s):  
W. Neubert ◽  
W. Neubert
Keyword(s):  
Experimental Data ◽  
Magnetic Fields ◽  
Fermi Surface ◽  
Single Crystals ◽  
Analytical Representation ◽  
Numerical Calculations ◽  
Scattering Mechanism ◽  
Weak Magnetic Fields

Abstract Magnetoresistance measurements of Copper and Silver single crystals in weak magnetic fields at 4.2 K are reported. In addition, the magnetosresistance has been calculated. The model used is based on ROAF's analytical representation of the Fermi surface. In view of the simplifying as­ sumptions made about bandstructure and scattering mechanism, the experimental data are found to agree reasonably well with the results of the numerical calculations.

Assessing magnetic nanoparticle aggregation in polymer melts by dynamic magnetic susceptibility measurements

2015 ◽  
Vol 378 ◽  
pp. 64-72 ◽  
Author(s):  
Sergio Sierra-Bermúdez ◽  
Lorena P. Maldonado-Camargo ◽  
François Orange ◽  
Maxime J.-F. Guinel ◽  
Carlos Rinaldi
Keyword(s):  
Magnetic Susceptibility ◽  
Magnetic Nanoparticle ◽  
Polymer Melts ◽  
Nanoparticle Aggregation ◽  
Dynamic Magnetic Susceptibility

The structural and organic magnetoresistance response of poly(9-vinyl carbazole) using low applied magnetic fields and magnetic nanoparticle addition

2017 ◽  
Vol 5 (15) ◽  
pp. 3779-3787 ◽  
Author(s):  
Mariano Romero ◽  
Ricardo Faccio ◽  
Milton A. Tumelero ◽  
André A. Pasa ◽  
Alvaro W. Mombrú
Keyword(s):  
Magnetic Nanoparticles ◽  
Magnetic Fields ◽  
Magnetic Nanoparticle ◽  
Structural Modifications ◽  
Organic Magnetoresistance

Evidence of PVK singlet-to-triplet and structural modifications are revealed with the addition of magnetic nanoparticles and low applied magnetic fields.

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