scholarly journals A new method for quantifying the nanoscale magnetic domains

2016 ◽  
Vol 34 (4) ◽  
pp. 924-927
Author(s):  
Zhenghua Li ◽  
Yi Hong ◽  
Jing Zhang ◽  
Xiang Li
Keyword(s):  
Magnetic Force ◽  
Magnetic Thin Films ◽  
Transformation Method ◽  
Magnetic Domains ◽  
Recording Industry ◽  
Basic Principles ◽  
Magnetic Structures ◽  
Force Microscopy ◽  
Signal Transformation ◽  
Present Technique

AbstractIn this work, a signal transformation method to quantitatively analyze fine magnetic structures in nanometer length scales measured by magnetic force microscopy has been developed. Nanosized magnetic domains, magnetic charges with reconstructed polarity as well as quantified magnetic field contours of samples (such as ordered FePt dot arrays, hard magnetic thin films and polycrystalline La0.7Sr0.3 MnO3 (LSMO) films ) were investigated based on the basic principles of deconvolution and micromagnetics. The present technique is crucial for the analysis of fine magnetic structures, and is important for the development of next generation magnetic recording industry.

DOMAIN IMAGING OF MESOSCOPIC MAGNETIC STRUCTURES BY PHOTOELECTRON EMISSION MICROSCOPY

2002 ◽  
Vol 09 (01) ◽  
pp. 365-369 ◽  
Author(s):  
H. KIWATA ◽  
T. KIHARA ◽  
K. ONO ◽  
M. OSHIMA ◽  
T. OKUDA ◽  
...  
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
X Rays ◽  
Magnetic Domains ◽  
Photoelectron Emission ◽  
Circularly Polarized ◽  
Magnetic Structures ◽  
Force Microscopy ◽  
Emission Microscopy ◽  
Photoelectron Emission Microscopy

We have observed magnetic domains of mesoscopic magnetic structures of Ni by synchrotron radiation photoelectron emission microscopy using circularly polarized soft X-rays from the bending magnet. The mesoscopic magnetic structures of Ni were fabricated by electron beam lithography combined with a chemical liftoff process. The geometries of the Ni mesoscopic samples were square, triangular and hexagonal with the sizes of 5 and 10 μm. The magnetic domains structures were clearly observed by dividing the images measured at the Ni L3-edge by the images measured at the Ni L2-edge. The magnetic domains of the Ni mesoscopic structures are discussed with the results of magnetic force microscopy and micromagnetic simulation.

Magnetic Force Microscopy Investigation of Magnetic Domains in Nd[sub 2]Fe[sub 14]B

2010 ◽  
Author(s):  
Mahesh Kumar Talari ◽  
G. Markandeyulu ◽  
K. Prasad Rao ◽  
A. K. Yahya ◽  
Shah Alam
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Magnetic Domains ◽  
Force Microscopy ◽  
Microscopy Investigation

scholarly journals Visualization of magnetostructural transition in Heusler alloys by Magnetic Force Microscopy

2018 ◽  
Vol 185 ◽  
pp. 05004
Author(s):  
Pavel Geydt ◽  
Igor D. Rodionov ◽  
Alexander B. Granovsky ◽  
Ekaterina Soboleva ◽  
Egor Fadeev ◽  
...  
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Domain Walls ◽  
Heusler Alloys ◽  
Scanning Probe ◽  
Magnetic Domains ◽  
Magnetic Signal ◽  
Force Microscopy ◽  
Magnetostructural Transition ◽  
Probe Microscope

Magnetostructural transition was observed in Ni-Mn-In-Cr Heusler alloy with help of Magnetic Force Microscopy (MFM). The crystal structure of a sample and characteristic temperatures of the phase transition were controlled by roentgenostructural phase analysis and magnetometry, respectively. It appeared prominently important to prepare the surface of the sample until the nanometer level of surface roughness. Magnetic study performed with scanning probe microscope revealed existence of magnetic domains, which were spread across the surface evenly. Further studies revealed that intensity of magnetic signal decreases as fading out of the contrast of the MFM images. It was found that location of domains shifted after the heating/cooling cycle above Curie temperature for the studied alloy. Location of new domain walls appeared correlating with surface scrapings and defects, whilst it became independent from those after heating until just 70°C. The mechanism behind the observed transition is proposed.

Perpendicular magnetic domains of a thin Ag/Fe/Ag film observed by magnetic force microscopy at room temperature

2002 ◽  
Vol 250 ◽  
pp. 32-38 ◽  
Author(s):  
R Hoffmann ◽  
D.E Bürgler ◽  
P.J.A van Schendel ◽  
H.J Hug ◽  
S Martin ◽  
...  
Keyword(s):  
Magnetic Force Microscopy ◽  
Room Temperature ◽  
Magnetic Force ◽  
Magnetic Domains ◽  
Force Microscopy ◽  
Ag Film

Secondary resonance magnetic force microscopy using an external magnetic field for characterization of magnetic thin films

2015 ◽  
Vol 107 (10) ◽  
pp. 103110 ◽  
Author(s):  
Dongzi Liu ◽  
Kangxin Mo ◽  
Xidong Ding ◽  
Liangbing Zhao ◽  
Guocong Lin ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Thin Films ◽  
External Magnetic Field ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Magnetic Thin Films ◽  
Secondary Resonance ◽  
Force Microscopy

Recent Advances In Magnetic Force Microscopy: Imaging In The Presence Of External Fields

1999 ◽  
Vol 5 (S2) ◽  
pp. 22-23
Author(s):  
Romel D. Gomez
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Domain Wall Motion ◽  
External Fields ◽  
Microscopy Imaging ◽  
Magnetic Systems ◽  
Magnetic Structures ◽  
Force Microscopy ◽  
Magnetic Elements ◽  
Standard Software

In the last decade since its development, magnetic force microscopy[l] has emerged as a workhorse in imaging magnetic structures at the sub-micron length scales. It possesses the desirable attributes of robustness, straightforward implementation and a fairly well characterized image contrast formation. In recent years, we have successfully implemented MFM in the presence of a highly controlled external magnetic field.[2] Using this technique, it is possible to follow the sample’s magnetic evolution at various points along it’s magnetization curve. Further, by using standard software implementation, the images can be presented as an animation of the micromagnetic process. We applied this technique to study a variety of slow varying dynamics of magnetic systems, including the dc erasure of thin film recording media[3], the mechanisms of moment rotation and reversal, and the domain wall motion nanostructured magnetic elements[4,5].In this talk, I will review the rudiments of the technique and show the “dynamics” of the magnetization of cobalt and Permalloy alloys interacting with external fields.

Ultrahigh Coercivity Magnetic Force Microscopy Probes to Analyze High-Moment Magnetic Structures and Devices

2010 ◽  
Vol 1 ◽  
pp. 6500104-6500104 ◽  
Author(s):  
Nissim Amos ◽  
Robert Fernandez ◽  
Rabee M Ikkawi ◽  
Meir Shachar ◽  
Jeongmin Hong ◽  
...  
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
High Moment ◽  
Magnetic Structures ◽  
Force Microscopy

scholarly journals Analysis of Magneto-Optical Hysteresis Loops of Amorphous and Surface-Crystalline Fe-Based Ribbons

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 141
Author(s):  
Ondřej Životský ◽  
Dmitry Markov ◽  
Kamila Hrabovská ◽  
Jiří Buršík ◽  
Yvonna Jirásková
Keyword(s):  
Magnetic Properties ◽  
Surface Area ◽  
Magnetic Force ◽  
Hysteresis Loops ◽  
Casting Process ◽  
Magnetic Domains ◽  
Force Microscopy ◽  
First Case ◽  
Transmission Electron ◽  
Different Shapes

Three Fe-based ribbon-type samples prepared by a conventional planar flow casting process are studied from the viewpoint of the amorphous Fe80Si4B16 and partially surface crystallized Fe80Si10B10, and Fe80.5Nb6.9B12.6, microstructures. Surface magnetic properties are investigated by magneto-optical Kerr microscopy, allowing the measurement of a local hysteresis loop from a selected area on the ribbon surface, and simultaneously, a domain structure corresponding to a definite point at the loop. For an amorphous sample, the changes in the slopes of hysteresis loops are related either to the size of the selected surface area, from which the loop is measured, or to the type, width, and movement of magnetic domains through this area. In the first case, the resizing of the area simulates an effect of changing the diameter of the incident laser beam on the magneto-optical properties of the ribbon. In the latter case, the observed wide-curved and fingerprint domains are responsible for markedly different shapes of the hysteresis loops at lower magnetic fields. If the surface is crystallized, the magnetic properties are more homogenous, showing typical one-jump magnetization reversal with less dependence on the size of the surface area. The magneto-optical experiments are completed by transmission electron microscopy and magnetic force microscopy.

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