Influence of an Inner-Sphere K+ Ion on the Magnetic Behavior of N23– Radical-Bridged Dilanthanide Complexes Isolated Using an External Magnetic Field

2014 ◽  
Vol 53 (6) ◽  
pp. 3099-3107 ◽  
Author(s):  
Katie R. Meihaus ◽  
Jordan F. Corbey ◽  
Ming Fang ◽  
Joseph W. Ziller ◽  
Jeffrey R. Long ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Behavior ◽  
Inner Sphere

COMPENSATION TEMPERATURE OF A MIXED SPIN-1 AND SPIN-1/2 HEISENBERG FERRIMAGNETIC MODEL

2004 ◽  
Vol 18 (10n11) ◽  
pp. 1637-1649 ◽  
Author(s):  
JUN LI ◽  
GUOZHU WEI ◽  
AN DU
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Crystal Field ◽  
Nearest Neighbor ◽  
Magnetic Behavior ◽  
Compensation Temperature ◽  
Square Lattice ◽  
Function Technique ◽  
Neighbor Interaction ◽  
Mixed Spin

The behavior of the compensation of a mixed spin-1 and spin-1/2 Heisenberg ferrimagnetic system on a square lattice is investigated theoretically by a two-time Green-function technique which takes into account the quantum nature of Heisenberg spins. The model includes the nearest and next-nearest neighbor interactions between spins, a crystal field and an external magnetic field. This model can be relevant for understanding the magnetic behavior of bimetallic molecular ferrimagnets that are currently being synthesized by several experimental groups. We study the spin-wave spectra of the ground state and investigate the effects of the next-nearest neighbor interactions, a crystal field and an external magnetic field on the compensation temperature. It is found that a compensation point appears and it is basically unchanged when the next-nearest-neighbor interaction between spin-1/2 is taken into account and exceeds a minimum value for other values in Hamiltonian fixed. The compensation temperature is influenced by the next-nearest-neighbor interaction between spin-1 and the external magnetic field and it is disappearing as these parameters exceed the trivial values.

Magnetic behavior of a ferronematic layer in an external magnetic field

1987 ◽  
Vol 65 (2-3) ◽  
pp. 173-176 ◽  
Author(s):  
Yu.L. Raikher ◽  
S.V. Burylov ◽  
A.N. Zakhlevnykh
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Behavior

scholarly journals Enhanced Magnetic Behavior of Cobalt Nano-Rods Elaborated by the Polyol Process Assisted with an External Magnetic Field

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 334 ◽  
Author(s):  
Mohamed Ali Bousnina ◽  
Amel Dakhlaoui-Omrani ◽  
Frédéric Schoenstein ◽  
Yaghoub Soumare ◽  
Aliou Hamady Barry ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Aspect Ratio ◽  
Applied Magnetic Field ◽  
Coercive Field ◽  
Permanent Magnets ◽  
Magnetic Behavior ◽  
Particle Morphology ◽  
Nano Rods ◽  
Hcp Structure

Cobalt nano-rods with the hexagonal close-packed (hcp) structure were prepared by reduction of the long-chain carboxylate Co (II) precursor in polyol. The application of an external magnetic field (µ0H = 1.25 T) during the nucleation and growth steps resulted in a noticeable modification of the mean aspect ratio (length/diameter) of the particles. The particle morphology was also modified as the nano-rods did not exhibit conical heads at their extremities anymore, which are observed for particles prepared without application of an external magnetic field. Besides, the stacking faults density along the c axis of the hcp structure in the cobalt nano-rods has been found to decrease with the increase in the applied magnetic field. The coercive field of randomly oriented nano-rods increased with the aspect ratio, showing the highest value (i.e., 5.8 kOe at 300 K) for the cobalt nano-rods obtained under the highest applied magnetic field. For partially oriented Co nano-rods in toluene solution, the magnetic properties were significantly enhanced with a coercive field of 7.2 kOe at 140 K, while the magnetization saturation reached 92% of the bulk. The MR/MS value was about 0.8, indicating a good orientation of the anisotropic particles relative to each other, making them suitable for the preparation of permanent magnets via a bottom-up approach.

scholarly journals An Exchange Mechanism for the Magnetic Behavior of Er3 Complexes+

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 4922
Author(s):  
Miroslav Georgiev ◽  
Hassan Chamati
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Spin Exchange ◽  
Magnetic Behavior ◽  
Molecular Geometry ◽  
Zeeman Splitting ◽  
Spin Coupling ◽  
Coupling Scheme ◽  
Effective Spin ◽  
Orbital Interactions

We study the magnetic properties of the erbium based compounds, Na9[Er(W5O18)2] and [(Pc)Er{Pc{N(C4H9)2}8}]·/−, in the framework of an effective spin exchange model involving delocalized electrons occupying molecular orbitals. The calculations successfully reproduce the experimental data available in the literature for the magnetic spectrum, magnetization and molar susceptibility in dc and ac fields. Owing to their similar molecular geometry, the compounds’ magnetic behaviors are interpreted in terms of the same set of active orbitals and thus the same effective spin coupling scheme. For all three complexes, the model predicts a prompt change in the ground state from a Kramer’s doublet at zero fields to a fully polarized quartet one brought about by the action of an external magnetic field without Zeeman splitting. This alteration is attributed to the enhancement of the effect of orbital interactions over the spin exchange as the magnitude of the external magnetic field increases.

RECOIL IMPLANTATION MÖSSBAUER EXPERIMENT ON 57Fe IN Ge IN THE PRESENCE OF AN EXTERNAL MAGNETIC FIELD

1980 ◽  
Vol 41 (C1) ◽  
pp. C1-445-C1-445
Author(s):  
G. Langouche ◽  
N. S. Dixon ◽  
L. Gettner ◽  
S. S. Hanna
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Recoil Implantation
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