Imaging Self-Organized Domains at the Micron Scale in Antiferromagnetic Elemental Cr Using Magnetic X-ray Microscopy

2001 ◽  
Vol 690 ◽  
Author(s):  
P. G. Evans ◽  
E. D. Isaacs ◽  
G. Aeppli ◽  
Z.-H. Cai ◽  
B. Lai
Keyword(s):  
Cross Section ◽  
Density Wave ◽  
Spin Density Wave ◽  
Magnetic Scattering ◽  
Antiferromagnetic Order ◽  
X Ray ◽  
First Order ◽  
Self Organized ◽  
X Ray Scattering ◽  
Ray Scattering

ABSTRACTThe domains of antiferromagnetic order in elemental chromium can be observed with spatial resolution that is improved by orders of magnitude in comparison with previous techniques using magnetic x-ray scattering with an incident x-ray beam focused to a submicron spot. This use of magnetic x-ray microscopy takes advantage of the incommensurate spin density wave order in Cr to isolate magnetic scattering. The spin polarization dependence of the magnetic x-ray scattering cross section allows the first order spin-flip transition near 120 K to be imaged directly.

The chromium spin density wave: magnetic X-ray scattering studies with polarisation analysis

2001 ◽  
Vol 20 (1) ◽  
pp. 19-25 ◽  
Author(s):  
D. Mannix ◽  
P.C. de Camargo ◽  
C. Giles ◽  
A.J.A. de Oliveira ◽  
F. Yokaichiya ◽  
...  
Keyword(s):  
Spin Density ◽  
Density Wave ◽  
Spin Density Wave ◽  
X Ray ◽  
X Ray Scattering ◽  
Polarisation Analysis ◽  
Ray Scattering

scholarly journals Spin dynamics and resonant inelastic x-ray scattering in chromium with commensurate spin-density wave order

2013 ◽  
Vol 87 (13) ◽  
Author(s):  
Koudai Sugimoto ◽  
Zhi Li ◽  
Eiji Kaneshita ◽  
Kenji Tsutsui ◽  
Takami Tohyama
Keyword(s):  
Spin Density ◽  
Spin Dynamics ◽  
Density Wave ◽  
Spin Density Wave ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

The non-resonant magnetic X-ray scattering cross-section for photon energies up to 500 keV

1997 ◽  
Vol 40 (5) ◽  
pp. 569-574 ◽  
Author(s):  
J Strempfer ◽  
Th Brückel ◽  
D Hupfeld ◽  
J. R Schneider ◽  
K.-D Liss ◽  
...  
Keyword(s):  
Cross Section ◽  
Scattering Cross Section ◽  
X Ray ◽  
Scattering Cross ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals Single-crystal X-ray diffraction and resonant X-ray magnetic scattering at helium-3 temperatures in high magnetic fields at beamline P09 at PETRA III

2015 ◽  
Vol 22 (5) ◽  
pp. 1207-1214 ◽  
Author(s):  
S. Francoual ◽  
J. Strempfer ◽  
J. Warren ◽  
Y. Liu ◽  
A. Skaugen ◽  
...  
Keyword(s):  
Variable Temperature ◽  
Density Wave ◽  
Spin Density Wave ◽  
Orthorhombic Phase ◽  
Resonant Scattering ◽  
Magnetic Scattering ◽  
Photon Flux ◽  
X Ray ◽  
Complete Study ◽  
Helium 3

The resonant scattering and diffraction beamline P09 at PETRA III at DESY is equipped with a 14 T vertical field split-pair magnet. A helium-3 refrigerator is available that can be fitted inside the magnet's variable-temperature insert. Here the results of a series of experiments aimed at determining the beam conditions permitting operations with the He-3 insert are presented. By measuring the tetragonal-to-orthorhombic phase transition occurring at 2.1 K in the Jahn–Teller compound TmVO4, it is found that the photon flux at P09 must be attenuated down to 1.5 × 109 photons s−1for the sample to remain at temperatures below 800 mK. Despite such a reduction of the incident flux and the subsequent use of a Cu(111) analyzer, the resonant X-ray magnetic scattering signal at the TmLIIIabsorption edge associated with the spin-density wave in TmNi2B2C below 1.5 K is intense enough to permit a complete study in magnetic field and at sub-Kelvin temperatures to be carried out.

Structural and Magnetic X-RAY Scattering Measurements of Epitaxial Dy thin Films

1991 ◽  
Vol 231 ◽  
Author(s):  
Michael F. Toney ◽  
David G. Wiesler ◽  
Brent D. Hermsmeier ◽  
Robin F. Farrow
Keyword(s):  
Temperature Dependence ◽  
Coherence Length ◽  
Magnetic Scattering ◽  
Temperature Hysteresis ◽  
Turn Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Similar Temperature Dependence ◽  
Scattering Measurements ◽  
Ray Scattering

AbstractWe report structural and magnetic X-ray scattering measurements of a 2000Å thick Dy film, sandwiched by LaF3 films on a GaAs(111) substrate. The structure was grow by molecular beam epitaxy with the c-axis of the Dy parallel to the LaF3 c-axis and GaAs[111] axis. For the magnetic X-ray scattering, we used a polarization analyzer and an X-ray energy near the Dy L111 absorption edge. ∆t this energy there is a resonant enhancement in the magnetic scattering intensity, and we obtained ≃-50 counts per second in the magnetic diffraction peaks.Between 85 and 179K, bulk Dy forms a helical antiferromagnetic structure, and below 85K, it transforms into a ferromagnet. We find that the c-axis lattice constant of the Dy film has a similar temperature dependence to bulk Dy from room temperature to about 110K, but below this, the film behaves differently from bulk and is strained. The temperature dependence of the turn-angle in the helical antiferromagnetic state is similar to bulk, although a weaker dependence is observed below ∼1 10K due to magnetoelastic effects. Surprisingly, the magnetic coherence length (≃310Å) is significantly shorter than the structural coherence length (≃730Å). The transition to ferromagnetic ordering at 86K exhibits temperature hysteresis as is evident in the structural and magnetic X-ray data and in SQUID magnetometry data. We believe this hysteresis arises from a combination of the strain-energy barrier accompanying the transition and magnetic inhomogeneities in the film.

scholarly journals X-ray-scattering measurements of the transient structure of a driven charge-density wave

1994 ◽  
Vol 50 (12) ◽  
pp. 8157-8165 ◽  
Author(s):  
E. Sweetland ◽  
A. C. Finnefrock ◽  
W. J. Podulka ◽  
M. Sutton ◽  
J. D. Brock ◽  
...  
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Measurements ◽  
Transient Structure ◽  
Ray Scattering
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