Nonequilibrium Cation Distribution, Canted Spin Arrangement, and Enhanced Magnetization in Nanosized MgFe2O4Prepared by a One-Step Mechanochemical Route

2006 ◽  
Vol 18 (13) ◽  
pp. 3057-3067 ◽  
Author(s):  
Vladimir Šepelák ◽  
Armin Feldhoff ◽  
Paul Heitjans ◽  
Frank Krumeich ◽  
Dirk Menzel ◽  
...  
Keyword(s):  
Cation Distribution ◽  
Canted Spin ◽  
Spin Arrangement ◽  
One Step

Nonequilibrium Cation Distribution, Canted Spin Arrangement, and Enhanced Magnetization in Nanosized MgFe2O4 Prepared by a One-Step Mechanochemical Route.

ChemInform ◽  
2006 ◽  
Vol 37 (37) ◽  
Author(s):  
Vladimir Sepelak ◽  
Armin Feldhoff ◽  
Paul Heitjans ◽  
Frank Krumeich ◽  
Dirk Menzel ◽  
...  
Keyword(s):  
Cation Distribution ◽  
Canted Spin ◽  
Spin Arrangement ◽  
One Step

Nanocrystalline Nickel Ferrite, NiFe2O4:  Mechanosynthesis, Nonequilibrium Cation Distribution, Canted Spin Arrangement, and Magnetic Behavior

2007 ◽  
Vol 111 (13) ◽  
pp. 5026-5033 ◽  
Author(s):  
Vladimir Šepelák ◽  
Ingo Bergmann ◽  
Armin Feldhoff ◽  
Paul Heitjans ◽  
Frank Krumeich ◽  
...  
Keyword(s):  
Cation Distribution ◽  
Nickel Ferrite ◽  
Magnetic Behavior ◽  
Nanocrystalline Nickel ◽  
Canted Spin ◽  
Spin Arrangement

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
Keyword(s):  
Mössbauer Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
Spin Reorientation ◽  
Spectra Analysis ◽  
Temperature Range ◽  
Mößbauer Spectroscopy ◽  
Fitting Procedure ◽  
Canted Spin ◽  
Spin Arrangement ◽  
Two State Model

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.

An Interactive Minicomputer Program for the Indexing and Simulation of Electron Diffraction Patterns

1976 ◽  
Vol 34 ◽  
pp. 542-543
Author(s):  
R.P. Goehner ◽  
W.T. Hatfield ◽  
Prakash Rao
Keyword(s):  
Electron Diffraction ◽  
Real Time ◽  
Pattern Analysis ◽  
Flow Diagram ◽  
Hard Copy ◽  
Time Analysis ◽  
Real Time Analysis ◽  
Transmission Electron ◽  
One Step ◽  
Diffraction Patterns

Computer programs are now available in various laboratories for the indexing and simulation of transmission electron diffraction patterns. Although these programs address themselves to the solution of various aspects of the indexing and simulation process, the ultimate goal is to perform real time diffraction pattern analysis directly off of the imaging screen of the transmission electron microscope. The program to be described in this paper represents one step prior to real time analysis. It involves the combination of two programs, described in an earlier paper(l), into a single program for use on an interactive basis with a minicomputer. In our case, the minicomputer is an INTERDATA 70 equipped with a Tektronix 4010-1 graphical display terminal and hard copy unit.A simplified flow diagram of the combined program, written in Fortran IV, is shown in Figure 1. It consists of two programs INDEX and TEDP which index and simulate electron diffraction patterns respectively. The user has the option of choosing either the indexing or simulating aspects of the combined program.

Nutrient-regulated gene expression in eukaryotes

2006 ◽  
Vol 73 ◽  
pp. 85-96 ◽  
Author(s):  
Richard J. Reece ◽  
Laila Beynon ◽  
Stacey Holden ◽  
Amanda D. Hughes ◽  
Karine Rébora ◽  
...  
Keyword(s):  
Gene Expression ◽  
Rna Polymerase ◽  
Rna Polymerase Ii ◽  
Transcriptional Control ◽  
Direct Interaction ◽  
Signalling Pathways ◽  
A Cell ◽  
One Step ◽  
Higher Eukaryotes ◽  
Regulated Gene Expression

The recognition of changes in environmental conditions, and the ability to adapt to these changes, is essential for the viability of cells. There are numerous well characterized systems by which the presence or absence of an individual metabolite may be recognized by a cell. However, the recognition of a metabolite is just one step in a process that often results in changes in the expression of whole sets of genes required to respond to that metabolite. In higher eukaryotes, the signalling pathway between metabolite recognition and transcriptional control can be complex. Recent evidence from the relatively simple eukaryote yeast suggests that complex signalling pathways may be circumvented through the direct interaction between individual metabolites and regulators of RNA polymerase II-mediated transcription. Biochemical and structural analyses are beginning to unravel these elegant genetic control elements.

CAD: One Step Forward, One Step Back

2010 ◽  
Vol 43 (18) ◽  
pp. 16
Author(s):  
MATTHEW R.G. TAYLOR
Keyword(s):  
One Step

One-Step Synthesis and Magnetic Phase Transformation of Ln-TM-B Alloy by Chemical Reduction

2007 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
C.W. Kim ◽  
Y.H. Kim ◽  
H.G. Cha ◽  
D.K. Lee ◽  
Y.S. Kang
Keyword(s):  
Phase Transformation ◽  
Magnetic Phase ◽  
Chemical Reduction ◽  
One Step
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