Magnetic Compton profile of SrRuO3
Inquiry number
SOL-0000001170
Beamline
BL08W (High Energy Inelastic Scattering)
Scientific keywords
| A. Sample category | inorganic material |
|---|---|
| B. Sample category (detail) | metal, alloy, superconductor, magnetic material, solid-state crystal |
| C. Technique | inelastic scattering |
| D. Technique (detail) | magnetic scattering, Compton scattering |
| E. Particular condition | polarization (circular), low-T (~ liquid He), magnetic field (> 2 T) |
| F. Photon energy | X-ray (> 40 keV) |
| G. Target information | electronic state, spin/magnetism |
Industrial keywords
| level 1---Application area | storage device |
|---|---|
| level 2---Target | HD,MO |
| level 3---Target (detail) | magnetic layer |
| level 4---Obtainable information | electronic state, magnetic moment, magnetic anisotropy |
| level 5---Technique | magnetic scattering, magnetic Compton scattering, PEEM |
Classification
A80.14 magnetic materials, M25.10 magnetic scattering
Body text
Magnetic Compton scattering measurement is a unique technique to study magnetic compounds. Using this technique, one can measure the spin-dependent electron momentum distribution in ferro- and ferrimagnetic compounds. When the MCP can be decomposed into a few partial profiles with the characteristic shape of a specific electronic state, the area under the partial profile gives the partial spin moment associated with that state. The figure shows the magnetic Compton profiles of SrRuO3. These data reveal the fact that the spin polarization of strongly hybridized Ru t2gO p orbitals are observed, and the partial occupation of Rueg-Op orbital is shown to be much smaller than that of band theory studies .
Fig. Magnetic Compton profiles of SrRuO3.
[ N. Hiraoka, M. Itou, A. Deb, Y. Sakurai, Y. Kakutani, A. Koizumi, N. Sakai, S. Uzuhara, S. Miyaki, H. Koizumi, K. Makoshi, N. Kikegawa and Y. Maeno, Physical Review B 70, 054420 (2004), Fig. 1,
©2004 American Physical Society ]
Source of the figure
Original paper/Journal article
Journal title
N. Hiraoka, et.al.,PHYSICAL REVIEW B 70 (2004) 054420
Figure No.
1
Technique
When the incident x-rays are circularly polarized, the scattering cross-section contains a spin-dependent term. The experimental extraction of the spin dependence results in a magnetic Compton profile (MCP), Jmag(pz), that is defined as the one-dimensional projection of the spin-polarized electron momentum distribution. The area under the MCP is equal to the total spin moment (μspin) per formula unit.
where n↑(p) and n↓(p) are the momentum densities of the majority and minority spin bands, respectively.
Source of the figure
No figure
Required time for experimental setup
4 hour(s)
Instruments
| Instrument | Purpose | Performance |
|---|---|---|
| Magnetic Compton Scattering Spectrometer | Magnetic Compton measurement | momentum resolution 0.5 atomic unit |
References
| Document name |
|---|
| N. Hiraoka, et.al.,PHYSICAL REVIEW B 70 (2004) 054420 |
Related experimental techniques
XMCD, ARPES
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
Easy
Ease of analysis
Middle
How many shifts were needed for taking whole data in the figure?
Four-nine shifts