関連する実験動画

Updated: May 26, 2026

Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition
09:45

Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition

Published on: July 26, 2016

2H-ペロフスキート関連の酸化物における相変化,磁気モメント,およびバレンスの不均衡の間の興味深い相互関係

Qingbiao Zhao1, Jacques Darriet, Myung-Hwan Whangbo

  • 1Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA.

Journal of the American Chemical Society
|December 7, 2011
PubMed
まとめ

この研究は,Sr(5) Co(4) O(12) とSr(6) Co(5) O(15) オキシドの結晶構造と磁気特性を詳細に説明しています. Sr{5) Co{4) O{12) は,コバルトバレンスの不均衡とJahn-Tellerの歪みに関連した相変化を示す.

さらに関連する動画

Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing06:44

Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing

Published on: June 9, 2023

Writing and Low-Temperature Characterization of Oxide Nanostructures06:43

Writing and Low-Temperature Characterization of Oxide Nanostructures

Published on: July 18, 2014

関連する概念動画

Valence Bond Theory02:42

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
Colors and Magnetism03:02

Colors and Magnetism

Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
Phase Diagrams of Ternary Systems01:28

Phase Diagrams of Ternary Systems

Consider a ternary system, which is composed of three components: water (W), ethanoic acid (E), and trichloromethane (T). Here, Ethanoic acid (E) is fully miscible with both water (W) and trichloromethane (T), meaning it can mix entirely with either of them. However, water and trichloromethane have partial miscibility, meaning they can only mix to a certain extent, beyond which two separate phases will form.The phase diagram of a ternary system is represented as an equilateral triangle, where...
Phase Diagram01:19

Phase Diagram

The phase of a given substance depends on the pressure and temperature. Thus, plots of pressure versus temperature showing the phase in each region provide considerable insights into the thermal properties of substances. Such plots are known as phase diagrams. For instance, in the phase diagram for water (Figure 1), the solid curve boundaries between the phases indicate phase transitions (i.e., temperatures and pressures at which the phases coexist).
Phase Diagram01:24

Phase Diagram

A phase diagram is a graphical representation of the physical states of a substance under different conditions of temperature and pressure. It shows the boundaries between solid, liquid, and gas phases and the conditions at which these phases coexist in equilibrium. An area in a phase diagram represents a single phase, whereas lines or phase boundaries represent the equilibrium between two phases.In the phase diagram of water, the boundary line between the solid and liquid states illustrates...