Direct observation of charge transfer in a cyanide
Inquiry number
SOL-0000000946
Beamline
BL02B2 (Powder Diffraction)
Scientific keywords
| A. Sample category | inorganic material |
|---|---|
| B. Sample category (detail) | magnetic material, solid-state crystal, crystal |
| C. Technique | X-ray diffraction |
| D. Technique (detail) | powder diffraction |
| E. Particular condition | low-T (~ liquid N2), room temperature |
| F. Photon energy | X-ray (4-40 keV) |
| G. Target information | chemical bonding, structure analysis, crystal structure, structural change, function and structure, charge density, phase transition |
Industrial keywords
| level 1---Application area | storage device |
|---|---|
| level 2---Target | HD,MO, CD-R、DVD |
| level 3---Target (detail) | magnetic layer |
| level 4---Obtainable information | interatomic distance, crystal structure, valence |
| level 5---Technique | diffraction |
Classification
A80.14 magnetic materials, M10.20 powder diffraction
Body text
Powder diffraction is a powerful technique to study crystal structures. Using this technique, one can measure structural parameters such as lattice parameters, atomic positions, etc of crystalline materials. By using synchrotron radiation one can also obtain charge density level structure closely related with physical properties as well as structural parameters. The figure shows charge density distributions obtained by analyzing diffraction data of RbMn[Fe(CN)6] with photo-induced magnetism. These data reveal the fact that the charge transfer from Mn to Fe sites occurs with the high- to low-temperature phase transition.
Fig. Charge densities of RbMn[Fe(CN)6] at high-temperature phase (left)
and low-temperature phase (right).
Source of the figure
Private communication/others
Description
BL担当自身が作成。
Technique
Powder diffraction using synchrotron radiation is a powerful technique to study crystal structures. The technique is applicable to materials together with charge transfer and provides knowledge about change of atomic valence.
Fig. A large Debye-Scherrer camera.
Source of the figure
Presentation material for Beamline Report
Required time for experimental setup
1 hour(s)
Instruments
| Instrument | Purpose | Performance |
|---|---|---|
| Large Debye-Scherrer camera | Powder diffraction | Camera radius: 286.48mm, Temperature: 15-1000K |
References
| Document name |
|---|
| K. Kato et al., Physical Review Letters, 91 (2003) 255502. |
Related experimental techniques
Single crystal structure analysis
Questionnaire
The measurement was possible only in SPring-8. Impossible or very difficult in other facilities.
This solution is an application of a main instrument of the beamline.
Similar experiments account for more than 30% of the beamline's subject.
Ease of measurement
Middle
Ease of analysis
Middle
How many shifts were needed for taking whole data in the figure?
Two-three shifts