scholarly journals Research on Soft Magnetic Nano Materials and Mössbauer Spectroscopy

2019 ◽  
Vol 28 (10) ◽  
pp. 11-14
Author(s):  
Sang Won LEE
Keyword(s):  
Mössbauer Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
Nano Materials ◽  
Soft Magnetic ◽  
Mößbauer Spectroscopy

scholarly journals Influence of W Addition on Phase Constitution, Microstructure and Magnetic Properties of the Nanocrystalline Pr9Fe65WxB26-x (Where: x = 2, 4, 6, 8) Alloy Ribbons

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2229
Author(s):  
Katarzyna Filipecka ◽  
Piotr Pawlik ◽  
Andrzej Kozdraś ◽  
Waldemar Kaszuwara ◽  
Jarosław Ferenc ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Mössbauer Spectroscopy ◽  
Melt Spinning ◽  
Mossbauer Spectroscopy ◽  
Magnetic Measurements ◽  
Soft Magnetic ◽  
Scanning Calorimetry ◽  
Phase Constitution ◽  
Mößbauer Spectroscopy ◽  
Microstructure And Magnetic Properties

The aim of the present work was to investigate an influence of W addition on the phase constitution, microstructure and magnetic properties of the Pr9Fe65WxB26-x (where: x = 2, 4, 6, 8) alloy ribbons. Ribbons were obtained using the melt-spinning technique under low pressure of Ar. The as-cast samples were fully amorphous and revealed soft magnetic properties. These facts were confirmed by X-ray diffractometry, Mössbauer spectroscopy and magnetic measurements. Differential scanning calorimetry and differential thermal analysis allowed us to determine the thermal stability parameters of the amorphous phase. The Kissinger plots were constructed in order to calculate the activation energies for crystallization. Heat treatment carried out at various temperatures caused changes in the phase constitution and magnetic properties of the alloys. The phase analysis has shown the presence of the hard magnetic Pr2Fe14B and paramagnetic Pr1+xFe4B4 phases. Additionally, for the x = 2 and x = 6 alloys, a crystallization of soft magnetic Fe2B and α-Fe phases was observed. The Mössbauer spectroscopy allowed us to determine the volume fractions of constituent phases formed during annealing. The microstructure of annealed ribbons was observed using transmission electron microscopy.

scholarly journals Characterization of magnetic nano materials by Mössbauer spectroscopy

2010 ◽  
Vol 217 ◽  
pp. 012101 ◽  
Author(s):  
Sangeeta Thakur ◽  
S C Katyal ◽  
A Gupta ◽  
V R Reddy ◽  
M Singh
Keyword(s):  
Mössbauer Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
Nano Materials ◽  
Mößbauer Spectroscopy

Influence of External Factors on Amorphous and Nanocrystalline Soft Magnetic Alloys Studied by Mössbauer Spectroscopy

2006 ◽  
Vol 518 ◽  
pp. 195-202 ◽  
Author(s):  
Jarmila Degmová ◽  
J. Sitek ◽  
J. Bednarčík
Keyword(s):  
Mössbauer Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
Magnetic Behavior ◽  
External Factors ◽  
Soft Magnetic ◽  
Spectral Parameters ◽  
Mößbauer Spectroscopy ◽  
Soft Magnetic Alloys ◽  
Different Types ◽  
Nanocrystalline Soft Magnetic Alloys

In this paper, a review of recent 57Fe Mössbauer spectroscopy (MS) studies of external influence on the properties of amorphous and nanocrystalline Fe- and Co-based alloys is submitted. Different types of alloys (FeCuNbZr, FeCuNbSiB, FeCoCuNbB, CoFeZrB and CoFeSiB) in the form of original amorphous and nanocrystalline ribbons were subjected to different external factors: different annealing atmospheres, mechanical stress (for example influence of ball-milling) and tensile stress. It will be shown that the Mössbauer spectrometry is a suitable tool for such studies because the measured spectral parameters are very sensitive to the changes in the vicinity of the probe 57Fe-nuclei and thus, this technique provides a wide variety of information about structural and magnetic behavior of Fe-containing materials.

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