XMCD of Fe atomic wire on Au (788) substrate
Inquiry number
SOL-0000001142
Beamline
BL25SU (Soft X-ray Spectroscopy of Solid)
Scientific keywords
| A. Sample category | inorganic material |
|---|---|
| B. Sample category (detail) | metal, alloy, magnetic material, crystal |
| C. Technique | absorption and its secondary process |
| D. Technique (detail) | MCD, LD |
| E. Particular condition | polarization (circular), ultra-high vacuum, surface, low-T (~ liquid He), magnetic field (< 2 T) |
| F. Photon energy | soft X-ray |
| G. Target information | 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 | film thickness, local structure, electronic state, magnetic moment, magnetic anisotropy, interface magnetic structure |
| level 5---Technique | XMCD |
Classification
A30.20 surface・interface, A80.14 magnetic materials, A80.30 inorganic material, M40.30 XMCD, M40.40 soft x-ray spectroscopy
Body text
X-ray magnetic circular dichroism (XMCD) is a powerful tool to study magnetic properties of materials. XMCD provides element specific information such as magnetic moments. XMCD becomes an ultra-high sensitive magnetic probe for surface magnetism by means of total electron yield method. Figure below shows x-ray absorption and the XMCD spectra at the Fe L2,3-edges for different coverage of Fe on a Au(788) substrate. This result indicates that XMCD has successfully detect very small magnetization ( 10-8 emu). Increase of the orbital magnetic moments with decreasing the coverage has been found. Magnetic transition from superparamagnetic state to the paramagnetic has also been observed at 100K in temperature dependence of XMCD intensity (not shown here).
[ H. Fujisawa, S. Shiraki, M. Furukawa, M. Nantoh, M. Kawai, T. Nakamura and T. Muro, Journal of Electron Spectroscopy and Related Phenomena 144-147, 519-523 (2005), Fig. 1,
©2005 Elsevier Science Publisher ]
Source of the figure
Original paper/Journal article
Journal title
H. Fujisawa et al., J. Elecron. Spectrosc. and Relat Phenom. 144-147, 519-523 (2005).
Figure No.
1
Technique
XMCD technique is applied to the present study. Magnetic field of 1.4 T was applied to a CeNi sample so that effective XMCD signal can be detected. More advanced XMCD measurements is possible using the 4th. experimental station (electromagnet type XMCD spectrometer) at BL25SU, though the previous XMCD spectrometer using permanent magnet of 1.4 T was used for the present experiments.
Source of the figure
No figure
Required time for experimental setup
2 day(s)
Instruments
| Instrument | Purpose | Performance |
|---|---|---|
| Magnetic Circular Dichroism Measurement System (MCD) | measurements of soft x-ray MCD | 1.4 T, 40K - 300K |
References
Related experimental techniques
ESMH using hard x-ray at the BL39XU, VSM, SQUID, PEEM, Kerr effect, Mossbauer spectroscopy
Questionnaire
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?
Four-nine shifts