scholarly journals Field-sweep-rate dependence of the coercive field of single-molecule magnets: A classical approach with applications to the quantum regime

2005 ◽  
Vol 72 (21) ◽  
Author(s):  
W. Wernsdorfer ◽  
M. Murugesu ◽  
A. J. Tasiopoulos ◽  
G. Christou
Keyword(s):  
Single Molecule ◽  
Coercive Field ◽  
Sweep Rate ◽  
Rate Dependence ◽  
Classical Approach ◽  
Field Sweep ◽  
Single Molecule Magnets ◽  
Quantum Regime

Seeking Magneto-Structural Correlations in Easily Tailored Pentagonal Bipyramid Dy(III) Single-Ion Magnets

2019 ◽  
Author(s):  
Guo-Zhang Huang ◽  
Ze-Yu Ruan ◽  
Jie-Yu Zheng ◽  
Yan-Cong Chen ◽  
Si-Guo Wu ◽  
...  
Keyword(s):  
Single Molecule ◽  
Structural Engineering ◽  
Magnetic Hysteresis ◽  
Sweep Rate ◽  
Coordination Bond ◽  
Pentagonal Bipyramid ◽  
Single Molecule Magnets ◽  
Crystal Field Theory ◽  
Bond Angles ◽  
Axial Coordination

<p><a></a>Controlling molecular magnetic anisotropy via structural engineering is delicate and fascinating, especially for single-molecule magnets (SMMs). Herein a family of dysprosium single-ion magnets (SIMs) sitting in pentagonal bipyramid geometry have been synthesized with the variable-size terminal ligands and counter anions, through which the subtle coordination geometry of Dy(III) can be finely tuned based on the size effect. The effective energy barrier (Ueff) successfully increases from 439 K to 632 K and the magnetic hysteresis temperature (under a 200 Oe/s sweep rate) raises from 11 K to 24 K. Based on the crystal-field theory, a semi-quantitative magneto-structural correlation deducing experimentally for the first time is revealed that the Ueff is linearly proportional to the structural-related value S2<sup>0</sup> corresponding to the axial coordination bond lengths and the bond angles. Through the evaluation of the remanent magnetization from hysteresis, quantum tunneling of magnetization (QTM) is found to exhibit negative correlation with the structural-related value S<sub>tun</sub> corresponding to the axial coordination bond angles.<br></p>

Field sweep rate dependence of domain-wall speed distributions in a thin Ni80Fe20 film

2004 ◽  
Vol 96 (11) ◽  
pp. 6546-6549 ◽  
Author(s):  
T. A. Moore ◽  
A. Ionescu ◽  
J. A. C. Bland
Keyword(s):  
Domain Wall ◽  
Sweep Rate ◽  
Rate Dependence ◽  
Field Sweep

Field-sweep rate dependence of magnetization and current–voltage characteristics in superconducting disks

1997 ◽  
Vol 70 (17) ◽  
pp. 2300-2302 ◽  
Author(s):  
Y. Mawatari ◽  
A. Sawa ◽  
H. Obara ◽  
M. Umeda ◽  
H. Yamasaki
Keyword(s):  
Sweep Rate ◽  
Rate Dependence ◽  
Field Sweep ◽  
Current Voltage ◽  
Current Voltage Characteristics

Field Sweep Rate Dependence of Media Dynamic Coercivity

2004 ◽  
Vol 40 (4) ◽  
pp. 2446-2448 ◽  
Author(s):  
Q. Peng ◽  
H.J. Richter
Keyword(s):  
Sweep Rate ◽  
Rate Dependence ◽  
Field Sweep

Field sweep rate dependence of magnetization and E–J characteristics in YBa2Cu3O7 films

1997 ◽  
Vol 282-287 ◽  
pp. 2255-2256 ◽  
Author(s):  
Yasunori Mawatari ◽  
Akihito Sawa ◽  
Haruhiko Obara ◽  
Masaichi Umeda ◽  
Hirofumi Yamasaki
Keyword(s):  
Sweep Rate ◽  
Rate Dependence ◽  
Field Sweep
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