Anisotropy of magnetic Compton profiles in Co/Pd multilayer
Inquiry number
SOL-0000001167
Beamline
BL08W (High Energy Inelastic Scattering)
Scientific keywords
| A. Sample category | inorganic material |
|---|---|
| B. Sample category (detail) | metal, alloy, magnetic material, solid-state crystal, synthetic multilayer |
| 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, magnetic head |
| level 4---Obtainable information | electronic state, 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 an 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 Pd/Co multilayer. It has succeeded for the first time in observing the anisotropy of MCPs in the Co/Pd multilayer.
Fig. The magnetic Compton profiles (MCPs) of Co (0.8 nm)/Pd (1.6 nm) multilayer (solid circle), and Fe50Ni50 alloy (open circle) as a fcc Co [11] in (a) in-plane configuration and (b) out-of-plane configuration.
[ M. Ota, H. Sakurai, F. Itoh, M. Itoh and Y. Sakurai, Journal of Physics and Chemistry of Solids 65, 2065-2070 (2004), Fig. 6,
©2004 Pergamon Press, Elsevier Science Publishers ]
Source of the figure
Original paper/Journal article
Journal title
Journal of Physics and Chemistry of Solids, 65 (2004) 2065-2070
Figure No.
6
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 |
|---|
| Journal of Physics and Chemistry of Solids, 65 (2004) 2065-2070 |
Related experimental techniques
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