Periodic Length Dependence of Magnetic Properties in Fe/MnSb Multilayered Films

1991 ◽  
Vol 232 ◽  
Author(s):  
Shigeki Nakagawa ◽  
Hiroki Tanaka ◽  
Masahiko Naoe
Keyword(s):  
Magnetic Properties ◽  
Single Layer ◽  
Magnetic Characteristics ◽  
X Ray Diffraction ◽  
Multilayered Films ◽  
X Ray ◽  
Single Layer Film ◽  
Diffraction Diagram ◽  
Diffraction Peaks ◽  
The Relationship

ABSTRACTThe relationship between crystallographic and magnetic characteristics of multilayered films composed of Fe and MnSb layers were investigated in detail. The thicknesses of Fe and MnSb layers dFe and dMnSb were changed in the range of 50 ˜ 100 and 3˜ 100 Å, respectively. Although only the (110) oriented α-Fe crystallites appeared in the films with dMnSb as small as about 5 Å, both of X-ray diffraction peaks of Fe and MnSb crystallites were not detectable in one with dMnSb of about 15 Å. The growth of both Fe and MnSb crystallites seemed to be strongly prevented in the films with dMnSb in this range. On the contrary, the peaks corresponding to (110)Fe and (110)MnSb appeared in X-ray diffraction diagram for the film with dMnSb above 25 Å. The films with d of 10 Å and dFe of 20 Å exhibite the saturation magnetization 4πMs of 15 kG and the coercivity Hc of 0.2 Oe. Such a low Hc was two order lower than those of both Fe single layer film and MnSb one. This seems to be attributed to the fine granulation of Fe and MnSb crystallites.

The Effects of Ternary Elemental Additions on the Structure and Magnetic Properties of Nanocrystalline Feco Powders

2002 ◽  
Vol 753 ◽  
Author(s):  
I. Baker ◽  
R. G. Quiller ◽  
M. Robson ◽  
D. Wu
Keyword(s):  
Magnetic Properties ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Grain Sizes ◽  
Before And After ◽  
Diffraction Peaks ◽  
Computer Controlled ◽  
Steel Balls ◽  
Scanning Electron

ABSTRACTPowders of near-equiatomic Fe and Co were mechanically milled with additions of Zr, C, Ni, Cu and/or B for 60 hr using stainless steel balls in a Svegari attritor operated at 1300 r.p.m. under argon. The milled powders were examined before and after annealing at 600 °C. The morphologies and sizes of the powders were examined using a scanning electron microscope. The grain sizes were characterized from the widths of X-ray diffraction peaks obtained using a computer-controlled x-ray diffractometer and the lattice parameters were determined. The resulting magnetic properties were measured using a vibrating sample magnetometer.

scholarly journals Dependence of the magnetic properties of Co/Pd multilayered films on the structural parameters estimated accurately by x‐ray diffraction

1992 ◽  
Vol 72 (10) ◽  
pp. 4986-4988 ◽  
Author(s):  
S. K. Kim ◽  
J. S. Kang ◽  
J. I. Jeong ◽  
J. H. Hong ◽  
Y. M. Koo ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Structural Parameters ◽  
X Ray Diffraction ◽  
Multilayered Films ◽  
X Ray

Microstructure and magnetic properties of NdFeB/Mo multilayered films prepared by magnetron sputtering

2016 ◽  
Vol 30 (08) ◽  
pp. 1650126
Author(s):  
Yudong Fu ◽  
Feng Yan ◽  
Xiaoshuo Zhu ◽  
Xiaoxue Feng ◽  
Zaizai Guo
Keyword(s):  
Magnetic Properties ◽  
Magnetron Sputtering ◽  
Cross Section ◽  
Multilayer Structure ◽  
Remanent Magnetization ◽  
X Ray Diffraction ◽  
Multilayered Films ◽  
X Ray ◽  
Diffraction Patterns ◽  
Microstructure And Magnetic Properties

The paper was presented to study the microstructure and magnetic properties of Mo/[NdFeB/Mo] × 10/Mo multilayered films prepared by magnetron sputtering on Si(100) substrate. The SEM observation of microstructure showed that the specimen had fine multilayer structure and the NdFeB layers were successfully separated by Mo layers on the cross-section. The interface between the NdFeB and Mo layer disappeared after annealing. X-ray diffraction patterns of the annealed films revealed that there are a large amount of Nd2Fe[Formula: see text]B phases. The thickness of Mo layer had obvious effects on magnetic properties of the samples. When it reached 21 nm, the number and the intensity of NdFeB phase increase, and the remanent magnetization ratio Mr/Ms suddenly rise. The influences of annealing on surface morphology and microstructure of NdFeB thin films were also studied.

Effect of MnFe2O4 and the Heat Treatment Temperature on the Bioactive Glass Properties

2016 ◽  
Vol 690 ◽  
pp. 137-142
Author(s):  
Thanaporn Boonchoo ◽  
Pratthana Intawin ◽  
Wilaiwan Leenakul
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Magnetic Properties ◽  
Bioactive Glass ◽  
Glass Ceramics ◽  
Treatment Temperature ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Diffraction Peaks

In this study, the effects of heat treatment temperatures on structural and magnetic properties in MnFe2O4(MF)/SiO2-Na2O-CaO-P2O5 (bioglass) bioactive glass ceramics were investigated. The MF/SiO2-Na2O-CaO-P2O5 bioactive glass ceramics were fabricated under various heat treatment temperatures in a range of 600-1000 °C. X-ray diffraction (XRD) technique, the scanning electron microscopy (SEM) and transmission electron microscopy (TEM) are used to characterize phase and microstructure. The magnetic properties were determined from Vibrating Sample Magnetometer (VSM). The X-ray diffraction peaks presented two major crystalline phases: MnFe2O4 and Na2Ca2Si3O9. It was found that the heat treatment temperatures are the most influential parameter on microstructure and magnetic properties of the bioactive glass ceramics. The highest magnetic properties of studied ceramics were found in the sample heated at 1000 °C with adding 20 wt%. MF. The microstructural properties of the studies samples were investigated and the results were then correlated with the characteristics of heat treatment temperatures as well as the microstructure of the bioactive glass ceramic.

Effect of Hydration Products Transformation for Compressive Strength of Autoclaved Silicate Products

2012 ◽  
Vol 204-208 ◽  
pp. 3644-3647
Author(s):  
Chang Jun Ke ◽  
Shu Ying Wang ◽  
Jun Li Liu
Keyword(s):  
Compressive Strength ◽  
Steam Pressure ◽  
Diffraction Peak ◽  
Saturated Steam ◽  
Hydration Products ◽  
X Ray Diffraction ◽  
Spectroscopy Analysis ◽  
X Ray ◽  
Diffraction Peaks ◽  
The Relationship

the relationship between hydration products transformation and the compressive strength was studied with X-ray diffraction, infrared spectroscopy analysis. The results showed, 0.505nm hydrogarnets diffraction peaks weakened and 0.183nm CSH diffraction peak enhanced with different autoclaved time under 1.2MPa saturated steam pressure. 0.505nm hydrogarnets diffraction peak enhanced under lower saturated steam pressure for autoclaving 6h, then weaken under higher saturated steam pressure. And 0.183nm CSH diffraction peaks enhanced with different saturated steam pressure for autoclaving 6h. During autoclaving, hydrogarnet translate into Al-substituted calcium silicate hydrate (C-S-H). Transformation of hydration products is favorable for compressive strength of autoclaved sample.

scholarly journals Effect of alloying elements (Zr, Hf, Co), heat and mechanical treatment conditions on the phase composition and magnetic properties of SmFe11Ti compounds with ThMn12 structure

2018 ◽  
Vol 185 ◽  
pp. 04026 ◽  
Author(s):  
Andrey Urzhumtsev ◽  
Maksim Anikin ◽  
Evgeniy Tarasov ◽  
Mikhail Semkin ◽  
Maksim Cherepkov ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Mechanical Treatment ◽  
Annealing Temperature ◽  
Magnetic Hysteresis ◽  
High Energy ◽  
Magnetic Characteristics ◽  
X Ray Diffraction ◽  
X Ray ◽  
Treatment Conditions ◽  
Hysteresis Properties

The results of thermomagnetic, metallographic and X-ray diffraction phase analysis as well as the measurements of specific magnetization (σs), Curie temperature (TC), coercive force (HC) of (Sm,M)(Fe,M)12-xTix alloys samples, where M = Zr, Hf, Co with the ThMn12 main phase structure (1-12) are presented. The effect of the annealing temperature and the cooling rate on the formation of 1-12 phase and its magnetic properties, including the effect of high-energy milling on the magnetic hysteresis properties and alloys structure are described. It was found that the highest magnetic characteristics such as σs = 112.6 emu/g and TC = 600 ºC are attained in the (Sm0.8Zr0.2)(Fe0.75Co0.25)11.4Ti0.6 alloy after its annealing at 1050 °C and rapid cooling. It is noted that a mechanical milling of the alloy leads to 1-12 phase amorphization which accompanied by an α-(Fe) or metal Co phases impurity formation.

STRUCTURE AND MAGNETIC PROPERTIES OF NONOSIZED SnO-Fe2O3 MATERIAL OBTAINED BY BALL MILLING

2010 ◽  
Vol 09 (06) ◽  
pp. 567-570
Author(s):  
AHMED M. AL-SAIE ◽  
ADNAN JAAFAR ◽  
MOHAMED BOUOUDINA
Keyword(s):  
Magnetic Properties ◽  
Saturation Magnetization ◽  
Diffraction Pattern ◽  
Ball Milling ◽  
Magnetic Measurements ◽  
Spinel Phase ◽  
Ferromagnetic Behavior ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Peaks

A mixture of Fe 2 O 3 and SnO oxides has been mechanically milled to form SnFe 2 O 4 spinel phase. X-ray diffraction pattern of the milled mixture shows that after milling, both peaks of Fe 2 O 3 and SnO remain with a drastic decrease of their intensities and broadening. The appearance of a broad halo around 2θ ~ 31° indicates the formation of an amorphous phase. After annealing at 750°C for 1 h, SnO peaks disappear completely and new diffraction peaks emerge indicating the formation of a new nanophase i.e. SnO 2. Magnetic measurements of the as-milled mixture show a ferromagnetic behavior with saturation magnetization Ms = 6.8 emu/g which drastically decreases after annealing to 0.6 emu/g.

Structure and Magnetic Properties of FeNi/Ti Multilayered Films Grown by Magnetron Sputtering

2015 ◽  
Vol 233-234 ◽  
pp. 591-594 ◽  
Author(s):  
Andrey V. Svalov ◽  
Vladimir O. Vas’kovskiy ◽  
A. Larrañaga ◽  
Galina V. Kurlyandskaya
Keyword(s):  
Magnetic Properties ◽  
Magnetron Sputtering ◽  
Spontaneous Magnetization ◽  
X Ray Diffraction ◽  
Multilayered Films ◽  
X Ray ◽  
Magnetic Layers ◽  
Effective Magnetization

Structure and magnetic properties of FeNi/Ti multilayers prepared by magnetron sputtering were studied. The dependences of the spontaneous magnetization and hysteresis features of the films on the thickness of the magnetic layers were established. It was shown that these properties were to a large extent determined by interlayer interfaces, in which the effective magnetization decreases. The possible reason for the interface peculiarities was the interlayer mixing. The presence of (FeNi)Ti phase which was formed by the interdiffusion of FeNi and Ti layers was confirmed by X-ray diffraction measurements.

Structural Characterization of Magnetic Recording Media by Using Grazing Incident and Conventional X-Ray Diffraction

1992 ◽  
Vol 36 ◽  
pp. 197-202
Author(s):  
Po-Wen Wang
Keyword(s):  
Thin Film ◽  
Magnetic Properties ◽  
Depth Resolution ◽  
Grazing Incidence ◽  
Recording Media ◽  
Magnetic Recording Media ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Relationship

In recent years, the microstructure of Co-based alloy magnetic thin film disks has been studied extensively by using a conventional x-ray diffraction (XRD) technique(1-4). Efforts to understand the relationship between the microstructure and the magnetic properties of disk had been limited due to the lack of depth resolution in the conventional theta-2theta scanning technique. In this paper, a fixed 0.5 degree of grazing incidence(5) 2-theta scan X-ray diffraction (GIXRD) technique was used to characterize the thin film disk microstructure and therefore to correlate with the magnetic properties.

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