The materials of ammonium metal formate framework: structures, phase transitions and functionalities

Mixed-valence iron(ii)–iron(iii) formate framework templated by diethylammonium cations exhibit structural and magnetic phase transitions near 240 and 39 K, respectively.

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Simulation of Structural Phase Transitions in Perovskite Methylhydrazinium Metal–Formate Frameworks: Coupled Ising and Potts Models

The Journal of Physical Chemistry C ◽

10.1021/acs.jpcc.9b03448 ◽

2019 ◽

Vol 123 (32) ◽

pp. 19912-19919 ◽

Cited By ~ 1

Author(s):

Mantas Šimėnas ◽

Andrius Ibenskas ◽

Alessandro Stroppa ◽

Anna Gągor ◽

Mirosław Mączka ◽

...

Keyword(s):

Phase Transitions ◽

Structural Phase ◽

Structural Phase Transitions ◽

Potts Models ◽

Metal Formate

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Phase Transitions and Coexistence of Magnetic and Electric Orders in the Methylhydrazinium Metal Formate Frameworks

Chemistry of Materials ◽

10.1021/acs.chemmater.6b05249 ◽

2017 ◽

Vol 29 (5) ◽

pp. 2264-2275 ◽

Cited By ~ 87

Author(s):

Mirosław Mączka ◽

Anna Gągor ◽

Maciej Ptak ◽

Waldeci Paraguassu ◽

Tercio Almeida da Silva ◽

...

Keyword(s):

Phase Transitions ◽

Metal Formate

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Electron Microscopy of Graphite Intercalation Compounds

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100055564 ◽

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.

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Multiple phase transitions investigated by high-speed TEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100175880 ◽

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)

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