scholarly journals Magnetic force microscopy reveals meta-stable magnetic domain states that prevent reliable absolute palaeointensity experiments

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Lennart V. de Groot ◽  
Karl Fabian ◽  
Iman A. Bakelaar ◽  
Mark J. Dekkers
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Magnetic Domain ◽  
Force Microscopy

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.

Measurement and Analysis of Magnetic Domain Properties of High-Density Patterned Media by Magnetic Force Microscopy

2009 ◽  
Vol 45 (5) ◽  
pp. 2308-2311 ◽  
Author(s):  
Minseok Choi ◽  
Jung Mo Yang ◽  
Jiseok Lim ◽  
Namseok Lee ◽  
Shinill Kang
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Magnetic Domain ◽  
High Density ◽  
Patterned Media ◽  
Force Microscopy ◽  
Measurement And Analysis

Magnetic domain structures and stray fields of individual elongated magnetite grains revealed by magnetic force microscopy (MFM)

2004 ◽  
Vol 141 (2) ◽  
pp. 121-129 ◽  
Author(s):  
C. Frandsen ◽  
S.L.S. Stipp ◽  
S.A. McEnroe ◽  
M.B. Madsen ◽  
J.M. Knudsen
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Magnetic Domain ◽  
Force Microscopy ◽  
Domain Structures

Investigation of magnetic domain patterns on a thin film surface of La0.7Sr0.3MnO3 at various temperatures using magnetic force microscopy

2002 ◽  
Vol 507-510 ◽  
pp. 573-576 ◽  
Author(s):  
Y.-R. Ma ◽  
C.-H. Chueh ◽  
W.-L. Kuang ◽  
Y. Liou ◽  
Y.-D. Yao
Keyword(s):  
Thin Film ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Magnetic Domain ◽  
Film Surface ◽  
Force Microscopy ◽  
Thin Film Surface

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.

scholarly journals Direct visualization of magnetic domain wall motion in Nd-Fe-B magnets by alternating magnetic force microscopy using Co-GdO superparamagnetic tip

2020 ◽  
Vol 212 ◽  
pp. 112980
Author(s):  
Yongze Cao ◽  
Yue Zhao ◽  
Jin Tang ◽  
Haifeng Du ◽  
Yan Zhou ◽  
...  
Keyword(s):  
Domain Wall ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Wall Motion ◽  
Magnetic Domain ◽  
Domain Wall Motion ◽  
Direct Visualization ◽  
Magnetic Domain Wall ◽  
Force Microscopy

Plate domain structure of sintered NdFeB magnets and dependence on compacting mode

2001 ◽  
Vol 16 (10) ◽  
pp. 2992-2995 ◽  
Author(s):  
Zhen Rong Zhang ◽  
Bao Shan Han ◽  
Ye Qing He ◽  
Shou Zeng Zhou
Keyword(s):  
Domain Structure ◽  
Applied Field ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Magnetic Domain ◽  
Nonmagnetic Metal ◽  
Isostatic Pressing ◽  
Force Microscopy ◽  
Die Pressing ◽  
Better Than

The alignment degree of sintered Nd–Fe–B magnets and its dependence on applied field and compacting mode were studied by magnetic force microscopy. By analyzing the magnetic force images to illustrate the magnetic-domain structure, an experimental method for quantitatively evaluating the alignment degree of sintered Nd–Fe–B magnets was given. The results show that if the compacting mode is the same, the alignment of magnets will be better as field increases. Under the same field, the alignment degree for rubber isostatic pressing with vibration is better than that for nonmagnetic metal die pressing. However, if the sample is compacted by rubber isostatic pressing without vibration, the alignment degree decreases significantly.

Thickness-dependent magnetic domain structures of ultrathin Co/Au(111) films studied by means of magnetic force microscopy in ultrahigh vacuum

1998 ◽  
Vol 66 (4) ◽  
pp. 465-467 ◽  
Author(s):  
A. Wadas ◽  
M. Dreyer ◽  
M. Kleiber ◽  
R. Wiesendanger
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Magnetic Domain ◽  
Ultrahigh Vacuum ◽  
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
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