Magnetic domain structures in arrays of submicron Co dots studied with magnetic force microscopy

2000 ◽  
Vol 87 (9) ◽  
pp. 5111-5113 ◽  
Author(s):  
M. Demand ◽  
M. Hehn ◽  
K. Ounadjela ◽  
R. L. Stamps ◽  
E. Cambril ◽  
...  
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Magnetic Domain ◽  
Force Microscopy ◽  
Domain Structures

Magnetic domain structures of Co22Ag78 granular films observed by magnetic force microscopy

1998 ◽  
Vol 72 (19) ◽  
pp. 2472-2474 ◽  
Author(s):  
Y. J. Chen ◽  
W. Y. Cheung ◽  
I. H. Wilson ◽  
N. Ke ◽  
S. P. Wong ◽  
...  
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Magnetic Domain ◽  
Granular Films ◽  
Force Microscopy ◽  
Domain Structures

Magnetic Domain Structures Governed by Granular Morphology in La0.6Sr0.4MnO3Thin Films as Probed by Low-Temperature Magnetic Force Microscopy

2009 ◽  
Vol 2 ◽  
pp. 063002 ◽  
Author(s):  
Shinji Muranaka ◽  
Hidetaka Sugaya ◽  
Takashi Yamasaki ◽  
Tomoteru Fukumura ◽  
Masashi Kawasaki ◽  
...  
Keyword(s):  
Low Temperature ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Magnetic Domain ◽  
Force Microscopy ◽  
Domain Structures ◽  
Granular Morphology

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.

The Domain Structure of Die-Upset Anisotropic Magnet Based On Nd-(Fe, Co)-B Alloy

2011 ◽  
Vol 56 (1) ◽  
pp. 159-161 ◽  
Author(s):  
D. Płusa ◽  
M. Dośpial ◽  
D. Derewnicka-Krawczyńska ◽  
P. Wieczorek ◽  
U. Kotlarczyk
Keyword(s):  
Domain Structure ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Magnetic Domain ◽  
Magnetic Interaction ◽  
Dipolar Interaction ◽  
Vibrating Sample Magnetometer ◽  
Force Microscopy ◽  
Interaction Domains ◽  
Anisotropic Magnet

The Domain Structure of Die-Upset Anisotropic Magnet Based On Nd-(Fe, Co)-B Alloy The measurements of the recoil curves for the die-upset Nd-(Fe, Co)-B based magnets from different points on the magnetization and demagnetization curves have been carried out by means of the LakeShore vibrating sample magnetometer in an applied magnetic fields up to 2 T. From the recoil curves the so-called Wohlfarth's remanence relationship has been derived. From this it was deduced that the magnetic interaction existing between the magnet grains has a dipolar nature. The existence of the magnetic interaction has been confirmed by magnetic domain observations by using the magnetic force microscopy (MFM). In the area of interaction domains there is the fine scale magnetic contrast resulting from the dipolar interaction between neighboring grains.

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