Exchange Enhancement Effect During Phase Transitions in Magnetically Ordered Crystals

1990 ◽  
pp. 16-44
Author(s):  
Maxim A. Savchenko ◽  
Alexei V. Stefanovich
Keyword(s):  
Phase Transitions ◽  
Enhancement Effect ◽  
Exchange Enhancement ◽  
Magnetically Ordered

scholarly journals Critical behavior of nonequilibrium phase transitions to magnetically ordered states

2002 ◽  
Vol 65 (4) ◽  
Author(s):  
Thomas Birner ◽  
Karen Lippert ◽  
Reinhard Müller ◽  
Adolf Kühnel ◽  
Ulrich Behn
Keyword(s):  
Phase Transitions ◽  
Critical Behavior ◽  
Nonequilibrium Phase Transitions ◽  
Nonequilibrium Phase ◽  
Magnetically Ordered

scholarly journals Cation, magnetic, and charge ordering in MnFe3O5

2018 ◽  
Vol 6 (13) ◽  
pp. 3271-3275 ◽  
Author(s):  
K. H. Hong ◽  
A. M. Arevalo-Lopez ◽  
M. Coduri ◽  
G. M. McNally ◽  
J. P. Attfield
Keyword(s):  
High Pressure ◽  
Phase Transitions ◽  
Charge Ordering ◽  
Rich Variety ◽  
Magnetically Ordered

The high pressure material MnFe3O5 displays a rich variety of magnetically ordered states on cooling through three separate phase transitions.

Applicability of the landau theory of phase transitions to magnetically ordered systems

1981 ◽  
Vol 35 (1) ◽  
pp. 239-244 ◽  
Author(s):  
P. Tolédano ◽  
M. Clin ◽  
M. Hédoux
Keyword(s):  
Phase Transitions ◽  
Landau Theory ◽  
Magnetically Ordered

Magnetic phase transitions in an electroelastic model for magnetically ordered spin-crossover solids

2021 ◽  
Vol 104 (2) ◽  
Author(s):  
S. B. Ogou ◽  
T. D. Oke ◽  
F. Hontinfinde ◽  
K. Boukheddaden
Keyword(s):  
Phase Transitions ◽  
Spin Crossover ◽  
Magnetic Phase ◽  
Magnetic Phase Transitions ◽  
Magnetically Ordered

Electron Microscopy of Graphite Intercalation Compounds

1982 ◽  
Vol 40 ◽  
pp. 544-545
Author(s):  
G. Timp ◽  
L. Salamanca-Riba ◽  
L.W. Hobbs ◽  
G. Dresselhaus ◽  
M.S. Dresselhaus
Keyword(s):  
Electron Microscopy ◽  
Phase Transitions ◽  
Domain Wall ◽  
Intercalation Compounds ◽  
Lattice Plane ◽  
Wall Model ◽  
Graphite Intercalation Compounds ◽  
Fundamental Symmetry ◽  
Graphite Intercalation

Electron microscopy can be used to study structures and phase transitions occurring in graphite intercalations compounds. The fundamental symmetry in graphite intercalation compounds is the staging periodicity whereby each intercalate layer is separated by n graphite layers, n denoting the stage index. The currently accepted model for intercalation proposed by Herold and Daumas assumes that the sample contains equal amounts of intercalant between any two graphite layers and staged regions are confined to domains. Specifically, in a stage 2 compound, the Herold-Daumas domain wall model predicts a pleated lattice plane structure.

Multiple phase transitions investigated by high-speed TEM

1990 ◽  
Vol 48 (4) ◽  
pp. 550-551
Author(s):  
Oleg Bostanjoglo ◽  
Peter Thomsen-Schmidt
Keyword(s):  
Phase Transitions ◽  
High Speed ◽  
Short Exposure ◽  
Semiconductor Film ◽  
Time Resolved ◽  
Short Exposure Time ◽  
Multiple Phase ◽  
Model Substance ◽  
History Of ◽  
Electron Image

Thin GexTe1-x (x = 0.15-0.8) were studied as a model substance of a composite semiconductor film, in addition being of interest for optical storage material. Two complementary modes of time-resolved TEM were used to trace the phase transitions, induced by an attached Q-switched (50 ns FWHM) and frequency doubled (532 nm) Nd:YAG laser. The laser radiation was focused onto the specimen within the TEM to a 20 μm spot (FWHM). Discrete intermediate states were visualized by short-exposure time doubleframe imaging /1,2/. The full history of a transformation was gained by tracking the electron image intensity with photomultiplier and storage oscilloscopes (space/time resolution 100 nm/3 ns) /3/. In order to avoid radiation damage by the probing electron beam to detector and specimen, the beam is pulsed in this continuous mode of time-resolved TEM,too.Short events ( <2 μs) are followed by illuminating with an extended single electron pulse (fig. 1c)

Sign in / Sign up

Export Citation Format

Share Document