scholarly journals Search for canted spin arrangement in Er2−xTbxFe14B with Mössbauer spectroscopy

Nukleonika ◽  
2015 ◽  
Vol 60 (1) ◽  
pp. 93-96 ◽  
Author(s):  
Piotr M. Kurzydło ◽  
Bogdan F. Bogacz ◽  
Antoni T. Pędziwiatr ◽  
Dariusz Oleszak ◽  
Janusz Przewoźnik

Abstract The materials studied were polycrystalline compounds Er2−xTbxFe14B (x = 0.1, 0.2, 0.3, 0.4) which crystallize in a tetragonal lattice and display a variety of spin arrangements. The compounds have been measured with 57Fe Mössbauer spectroscopy over the temperature range 80–320 K in order to investigate the spin reorientation processes. Each compound was studied in a wide temperature range, with precise Mössbauer scanning in the vicinity of the transition. The set of spectra obtained for a given compound was analyzed using simultaneous fitting procedure to investigate the influence of the transition on the shape of the spectra. The fitting program was specified to analyze the transition according to the ‘two state model’: spins flip abruptly from initial angle to final arrangement (90° angle). Obtained results suggest that spin reorientation process cannot be described using only the mentioned above model. Additional computer simulations based on the Yamada–Kato model were conducted to determine temperature range and the type of spin alignments in the vicinity of the transition. These theoretical results supported by spectra analysis suggest the existence of intermediate (canted) spin arrangements in the studied compounds. The spin arrangement diagram was constructed.

2016 ◽  
Vol 684 ◽  
pp. 587-593
Author(s):  
Piotr M. Kurzydło ◽  
Antoni T. Pędziwiatr ◽  
Bogdan F. Bogacz ◽  
Janusz Przewoźnik ◽  
Dariusz Oleszak

1990 ◽  
Vol 76 (8) ◽  
pp. 967-970 ◽  
Author(s):  
I Nowik ◽  
K Muraleedharan ◽  
G Wortmann ◽  
B Perscheid ◽  
G Kaindl ◽  
...  

Nukleonika ◽  
2017 ◽  
Vol 62 (2) ◽  
pp. 123-127
Author(s):  
Piotr M. Kurzydło ◽  
Antoni T. Pędziwiatr ◽  
Bogdan F. Bogacz ◽  
Janusz Przewoźnik ◽  
Dariusz Oleszak

Abstract The spin reorientation process in the Tm2-xHoxFe14B series of compounds was studied using 57Fe Mössbauer spectroscopy over the temperature range 5.2-320 K with a focus on the analysis of conical spin arrangement. Each compound was studied by precise Mössbauer scanning in the vicinity of the transition and during the transition. By applying computer simulations based on the simplified Yamada-Kato model, as well as on some literature data for R2Fe14B (R = Tm, Ho) compounds, the above series was selected for studies as it contains compounds with different spin arrangements (axial, planar, conical). It was a crucial requirement for obtaining unambiguous angular dependences when applying a simultaneous fitting procedure of Mössbauer spectra. Such an extended procedure was applied which allowed the temperature dependence of the angle describing the position of the magnetization vector to be obtained. The results were compared with those from theoretical simulations. The spin arrangement diagram was constructed. A conical spin arrangement was confirmed over a wide temperature range.


2008 ◽  
Vol 103 (12) ◽  
pp. 123910 ◽  
Author(s):  
J. Żukrowski ◽  
A. Błachowski ◽  
K. Ruebenbauer ◽  
J. Przewoźnik ◽  
D. Sitko ◽  
...  

2018 ◽  
Vol 134 (5) ◽  
pp. 1036-1039
Author(s):  
P.M. Kurzydło ◽  
A.T. Pędziwiatr ◽  
B.F. Bogacz ◽  
R. Gargula ◽  
J. Przewoźnik

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