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.

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

Structural and Ferroelectric Properties of Epitaxial PbZr0.52Ti0.48O3 and BaTiO3 Thin Films Prepared on SrRuO3/SrTiO3(100) Substrates

2001 ◽  
Vol 688 ◽  
Author(s):  
J. Rodríguez Contreras ◽  
J. Schubert ◽  
U. Poppe ◽  
O. Trithaveesak ◽  
K. Szot ◽  
...  
Keyword(s):  
Thin Films ◽  
Rutherford Backscattering Spectrometry ◽  
Ferroelectric Properties ◽  
Hysteresis Loops ◽  
Tunnel Current ◽  
Single Crystalline ◽  
Force Microscopy ◽  
Atomic Force ◽  
Transmission Electron ◽  
Ferroelectric Hysteresis

AbstractWe have prepared single crystalline epitaxial PbZr0.52Ti0.48O3 (PZT) and BaTiO3 (BTO) thin films on single crystalline epitaxial SrRuO3 (SRO) thin films grown on SrTiO3 (100) (STO) substrates. PZT and SRO thin films were grown using high-pressure on-axis sputtering and BTO using pulsed laser deposition (PLD). The film thickness ranged between 12 to 165 nm. Their excellent structural properties, surface smoothness and interface sharpness were demonstrated by X-Ray Diffraction measurements (XRD), High Resolution Transmission Electron Microscopy (HRTEM) and Atomic Force Microscopy (AFM). Rutherford Backscattering Spectrometry and Channeling measurements (RBS/C) were used to analyze stoichiometry and crystalline quality. Ferroelectric hysteresis loops were obtained for all films of a thickness down to 12 nm showing a decrease in the remanent polarization Pr and an increase in the coercive field Ec towards thinner film thicknesses. Furthermore we have prepared tunneling junctions with a PZT or BTO barrier thickness of 3-6 nm. Reproducible bi-stable I-V-curves and bias dependence of the conductance were obtained suggesting an influence of the ferroelectric properties of the barrier material on the tunnel current.

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.

scholarly journals Magnetic vortex chirality determination via local hysteresis loops measurements with magnetic force microscopy

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Marco Coïsson ◽  
Gabriele Barrera ◽  
Federica Celegato ◽  
Alessandra Manzin ◽  
Franco Vinai ◽  
...  
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Hysteresis Loops ◽  
Magnetic Vortex ◽  
Force Microscopy

Giant magnetoimpedance in CoP electrodeposited microtubes

2000 ◽  
Vol 15 (3) ◽  
pp. 751-755 ◽  
Author(s):  
J. P. Sinnecker ◽  
J. M. García ◽  
A. Asenjo ◽  
M. Vázquez ◽  
A. García-Arribas
Keyword(s):  
Magnetic Anisotropy ◽  
Layer Thickness ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Hysteresis Loops ◽  
Giant Magnetoimpedance ◽  
Microscopy Imaging ◽  
Giant Magnetoimpedance Effect ◽  
Force Microscopy ◽  
Radial Anisotropy

Co90P10 amorphous microtubes with thickness ranging from 2 to 19 μm were electrodeposited onto Cu wire substrates. Samples exhibit radial magnetic anisotropy as deduced from hysteresis loops and magnetic force microscopy imaging. These microtubes show quite noticeable giant magnetoimpedance effect (GMI) with amplitude depending on layer thickness and frequency. The hysteresis in the GMI curves is small, which can be ascribed to the radial anisotropy. Such small hysteresis is of importance for technological applications.

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

Construction of hysteresis loops of single domain elements and coupled permalloy ring arrays by magnetic force microscopy

2003 ◽  
Vol 93 (10) ◽  
pp. 8540-8542 ◽  
Author(s):  
Xiaobin Zhu ◽  
P. Grütter ◽  
V. Metlushko ◽  
Y. Hao ◽  
F. J. Castaño ◽  
...  
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Hysteresis Loops ◽  
Single Domain ◽  
Force Microscopy

Research and development of technology for laser configuration of sensitive element of fluxgate inclinometer

2019 ◽  
pp. 85-93
Author(s):  
O. S. Yulmetova ◽  
O. N. Poslyanova ◽  
A. G. Shcherbak ◽  
M. V. Zhukov
Keyword(s):  
Magnetic Properties ◽  
Laser Treatment ◽  
Magnetic Force Microscopy ◽  
Sensitive Element ◽  
Magnetic Force ◽  
Arrhenius Equation ◽  
Air Analysis ◽  
Force Microscopy ◽  
Oxidation Processes ◽  
Kinetic Assessment

The paper presents the results of thermodynamic analysis of oxidation processes occurring during laser treatment of amorphous magnetically sensitive ribbon (71KNSR) in air and in the atmosphere of argon. Kinetic assessment of the rate of chemical reactions is based on the Arrhenius equation. The results of analytical calculations show that the decrease of magnetic properties of the alloy after laser treatment in the air is mostly determined by the formation of iron oxides Fe2O3 and Fe2O4. Chemical elemental analysis of the composition of the samples after laser configuration in argon shows a significant decrease in their composition of oxygen compared to samples configured in the air. Analysis of samples using scanning electron and magnetic force microscopy confirms the preservation of the magnetic properties after treatment in argon. The developed technology is used for the manufacture of a sensitive element of a fluxgate inclinometer.

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