Effects of Heavy Ion Irradiation on Short-Range Order of Fe-Cr-P-C Amorphous Alloys Investigated by Mössbauer and DSC Measurements

2002 ◽  
pp. 561-568
Author(s):  
E. Kuzmann ◽  
I. Virág ◽  
L. Pöppl ◽  
K. Havancsák ◽  
Z. Klencsár ◽  
...  
Keyword(s):  
Amorphous Alloys ◽  
Short Range ◽  
Short Range Order ◽  
Ion Irradiation ◽  
Heavy Ion ◽  
Range Order ◽  
Heavy Ion Irradiation ◽  
Dsc Measurements

scholarly journals Comparison of short-range order in irradiated dysprosium titanates

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Roman Sherrod ◽  
Eric C. O’Quinn ◽  
Igor M. Gussev ◽  
Cale Overstreet ◽  
Joerg Neuefeind ◽  
...  
Keyword(s):  
Long Range ◽  
Short Range ◽  
Structural Model ◽  
Ion Irradiation ◽  
Function Analysis ◽  
Ion Beam ◽  
Structural Response ◽  
Heavy Ion ◽  
Range Order ◽  
Radiation Resistant

AbstractThe structural response of Dy2TiO5 oxide under swift heavy ion irradiation (2.2 GeV Au ions) was studied over a range of structural length scales utilizing neutron total scattering experiments. Refinement of diffraction data confirms that the long-range orthorhombic structure is susceptible to ion beam-induced amorphization with limited crystalline fraction remaining after irradiation to 8 × 1012 ions/cm2. In contrast, the local atomic arrangement, examined through pair distribution function analysis, shows only subtle changes after irradiation and is still described best by the original orthorhombic structural model. A comparison to Dy2Ti2O7 pyrochlore oxide under the same irradiation conditions reveals a different behavior: while the dysprosium titanate pyrochlore is more radiation resistant over the long-range with smaller degree of amorphization as compared to Dy2TiO5, the former involves more local atomic rearrangements, best described by a pyrochlore-to-weberite-type transformation. These results highlight the importance of short-range and medium-range order analysis for a comprehensive description of radiation behavior.

Derelaxation of Amorphous Silicon by Ion Implantation: Optical Characterization

1991 ◽  
Vol 235 ◽  
Author(s):  
R. Reitano ◽  
M. G. Grimaldi ◽  
P. Baeri ◽  
E. Bellandi ◽  
A. Borghesi ◽  
...  
Keyword(s):  
Amorphous Silicon ◽  
Short Range ◽  
Short Range Order ◽  
Structural Changes ◽  
Low Dose ◽  
Near Infrared ◽  
Ion Irradiation ◽  
Infrared Region ◽  
Range Order ◽  
Density Of State

ABSTRACTThe transition between relaxed and unrelaxed amorphous silicon can be obtained by thermal treatment of the unrelaxed amorphous or by low dose ion irradiation of the relaxed material. In both cases a variation in the short range order has been invoked to explain the behavior of the structural changes probed by various techniques. In this work we study the influence of such changes on the optical properties of a-Si in the region of the transition between the relaxed and the unrelaxed states. We show that a progressive variation of the optical constant in the visible-near infrared region upon derelaxation occurs. Therefore, significant modifications of the electron density of state in the region above the optical gap are associated with the changes in the short range order probed by Raman spectroscopy.

Short range order in (Fe, Co, Ni)75Si15B10 amorphous alloys determined from magnetic anisotropy

1985 ◽  
Vol 54 (12) ◽  
pp. 1059-1063 ◽  
Author(s):  
A. Hernando ◽  
V. Madurga ◽  
J.M. Barandiarán ◽  
O.V. Nielsen
Keyword(s):  
Magnetic Anisotropy ◽  
Amorphous Alloys ◽  
Short Range ◽  
Short Range Order ◽  
Range Order

Effect of short-range order on the magnetic properties of Fe-B-C amorphous alloys: NMR and magnetization measurements

1992 ◽  
Vol 45 (9) ◽  
pp. 4695-4699 ◽  
Author(s):  
S. H. Ge ◽  
M. X. Mao ◽  
G. L. Chen ◽  
Z. H. Chen ◽  
C. L. Zhang ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloys ◽  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Magnetization Measurements

Estimation of Short-Range Order Parameters in Cu-Cd Amorphous Alloys

1994 ◽  
Vol 166-169 ◽  
pp. 387-392
Author(s):  
M. Niewiara ◽  
Eugeniusz Łągiewka ◽  
J. Podwórny
Keyword(s):  
Amorphous Alloys ◽  
Short Range ◽  
Short Range Order ◽  
Order Parameters ◽  
Range Order
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