Unusually high coercivity and critical single-domain size of nearly monodispersed CoFe2O4 nanoparticles

2003 ◽  
Vol 83 (14) ◽  
pp. 2862-2864 ◽  
Author(s):  
C. N. Chinnasamy ◽  
B. Jeyadevan ◽  
K. Shinoda ◽  
K. Tohji ◽  
D. J. Djayaprawira ◽  
...  
Keyword(s):  
Domain Size ◽  
Single Domain ◽  
High Coercivity ◽  
Cofe2o4 Nanoparticles

Combustion assisted preparation of high coercivity Sm–Co hard magnet with stable single-domain size

2020 ◽  
Vol 816 ◽  
pp. 152527 ◽  
Author(s):  
Hao Tang ◽  
Zegao Wang ◽  
Mohammad Aref Hasen Mamakhel ◽  
Mingdong Dong ◽  
Mogens Christensen
Keyword(s):  
Domain Size ◽  
Single Domain ◽  
High Coercivity ◽  
Hard Magnet

Theoretical single-domain size of NiZn ferrite

1998 ◽  
Vol 08 (PR2) ◽  
pp. Pr2-389-Pr2-392 ◽  
Author(s):  
A. Aharoni ◽  
J. P. Jakubovics
Keyword(s):  
Domain Size ◽  
Single Domain

Magnetic Domain Observation on Melt-Spun Nd-Fe-B Ribbons Using Magnetic Force Microscopy

1999 ◽  
Vol 577 ◽  
Author(s):  
A. Gavrin ◽  
C. Sellers ◽  
S.H. Liouw
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Magnetic Measurements ◽  
Magnetic Domain ◽  
Domain Size ◽  
High Coercivity ◽  
Uniform Domain ◽  
Cross Sectional ◽  
Force Microscopy ◽  
Melt Spun

ABSTRACTWe have used Magnetic Force Microscopy (MFM) to study the magnetic domain structures of melt-spun Nd-Fe-B ribbons. The ribbons are commercial products (Magnequench International, Inc. MQP-B and MQP-B+) with a thickness of approximately 20 microns. These materials have identical composition, Nd12.18B5.36Fe76.99Co5.46, but differ in quenching conditions. In order to study the distribution of domain sizes through the ribbon thickness, we have prepared cross-sectional samples in epoxy mounts. In order to avoid artifacts due to tip-sample interactions, we have used high coercivity CoPt coated MFM tips. Our studies show domain sizes typically ranging from 50-200 nm in diameter. This is in agreement with studies of similar materials in which domains were investigated in the plane of the ribbon. We also find that these products differ substantially in mean domain size and in the uniformity of the domain sizes as measured across the ribbon. While the B+ material shows nearly uniform domain sizes throughout the cross section, the B material shows considerably larger domains on one surface, followed by a region in which the domains are smaller than average. This structure is presumably due to the differing quench conditions. The region of coarse domains varies in thickness, disappearing in some areas, and reaching a maximum thickness of 2.75 µm in others. We also describe bulk magnetic measurements, and suggest that.

scholarly journals Coercivity of Near Single Domain Size Nd2Fe14B-type Particles

2012 ◽  
Vol 17 (3) ◽  
pp. 185-189
Author(s):  
H.W. Kwon ◽  
J.H. Yu
Keyword(s):  
Domain Size ◽  
Single Domain

Comparison of the Critical Single-Domain Size for Fe3O4 and γ-Fe2O3

1960 ◽  
Vol 31 (5) ◽  
pp. S71-S72 ◽  
Author(s):  
L. A. K. Watt ◽  
A. H. Morrish
Keyword(s):  
Domain Size ◽  
Single Domain

Enhancing the coercivity of SmCo5 magnet through particle size control

2020 ◽  
Vol 8 (6) ◽  
pp. 2109-2116 ◽  
Author(s):  
Hao Tang ◽  
Mohammad Aref Hasen Mamakhel ◽  
Mogens Christensen
Keyword(s):  
Particle Size ◽  
Size Control ◽  
Domain Size ◽  
Single Domain ◽  
Bottom Up ◽  
Particle Size Control

The bottom-up synthesis of SmCo5 particles with stable single-domain size exhibit a maximum coercivity of 2.6 MA m−1 (33.1 kOe).

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