Magnetic force microscopy investigation of the domain structure of nanocomposite Nd2Fe14B/Fe3B magnets

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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Restoration the domain structure from magnetic force microscopy image

Journal of Applied Physics ◽

10.1063/1.3679389 ◽

2012 ◽

Vol 111 (7) ◽

pp. 07E343 ◽

Cited By ~ 4

Author(s):

Dongping Wu ◽

Yuanfu Lou ◽

Fulin Wei ◽

Dan Wei

Keyword(s):

Domain Structure ◽

Magnetic Force Microscopy ◽

Magnetic Force ◽

Magnetic Force Microscopy Image ◽

Force Microscopy ◽

Microscopy Image ◽

Force Microscopy Image

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Effect of strain and growth morphology on the evolution of the domain structure of ferromagnetic manganites

MRS Proceedings ◽

10.1557/proc-819-n5.7 ◽

2004 ◽

Vol 819 ◽

Author(s):

Holly Miller ◽

J. S. Higgins ◽

Y. Mukovskii ◽

R. L. Greene ◽

Amlan Biswas

Keyword(s):

Curie Temperature ◽

Domain Structure ◽

Strain Distribution ◽

Magnetic Force Microscopy ◽

Magnetic Force ◽

Growth Morphology ◽

Surface Magnetism ◽

Two Phase ◽

Force Microscopy ◽

Magnetic Nanodots

AbstractThe effect of strain on the surface magnetism of the manganite La0.7Sr0.3MnO3 has been studied as a function of temperature, using magnetic force microscopy. The non- uniform strain distribution in the film leads to a two-phase coexistence between ferromagnetic and non-ferromagnetic phases. This leads to a reduction of the surface curie temperature and the formation of ferromagnetic islands. Methods of controlling this behavior in order to fabricate arrays of magnetic nanodots are discussed.

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

Journal of Materials Research ◽

10.1557/jmr.2001.0410 ◽

2001 ◽

Vol 16 (10) ◽

pp. 2992-2995 ◽

Cited By ~ 7

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.

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Domain Structure Analysis Using Magnetic Force Microscopy (MFM) in Sm2Fe17N3 Fine Particle (2-3 .MU.m) Reacted with Zn Metal. (I).

Journal of the Japan Society of Powder and Powder Metallurgy ◽

10.2497/jjspm.50.11 ◽

2003 ◽

Vol 50 (1) ◽

pp. 11-15 ◽

Cited By ~ 2

Author(s):

Kurima Kobayashi ◽

Mika Nakamura ◽

Takahiro Akiya ◽

Kazuo Hayakawa

Keyword(s):

Domain Structure ◽

Structure Analysis ◽

Fine Particle ◽

Magnetic Force Microscopy ◽

Magnetic Force ◽

Force Microscopy

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qPlus magnetic force microscopy in frequency-modulation mode with millihertz resolution

Beilstein Journal of Nanotechnology ◽

10.3762/bjnano.3.18 ◽

2012 ◽

Vol 3 ◽

pp. 174-178 ◽

Cited By ~ 12

Author(s):

Maximilian Schneiderbauer ◽

Daniel Wastl ◽

Franz J Giessibl

Keyword(s):

Domain Structure ◽

Magnetic Dipole ◽

Magnetic Force Microscopy ◽

Magnetic Force ◽

Scanning Tunneling ◽

Atomic Interaction ◽

Tunneling Microscopy ◽

Force Microscopy ◽

Dipole Interactions ◽

Single Probe

Magnetic force microscopy (MFM) allows one to image the domain structure of ferromagnetic samples by probing the dipole forces between a magnetic probe tip and a magnetic sample. The magnetic domain structure of the sample depends on the alignment of the individual atomic magnetic moments. It is desirable to be able to image both individual atoms and domain structures with a single probe. However, the force gradients of the interactions responsible for atomic contrast and those causing domain contrast are orders of magnitude apart, ranging from up to 100 Nm−1 for atomic interactions down to 0.0001 Nm−1 for magnetic dipole interactions. Here, we show that this gap can be bridged with a qPlus sensor, with a stiffness of 1800 Nm−1 (optimized for atomic interaction), which is sensitive enough to measure millihertz frequency contrast caused by magnetic dipole–dipole interactions. Thus we have succeeded in establishing a sensing technique that performs scanning tunneling microscopy, atomic force microscopy and MFM with a single probe.

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