Temperature dependence of resonant x-ray magnetic scattering in holmium

1994 ◽  
Vol 50 (5) ◽  
pp. 2990-3004 ◽  
Author(s):  
G. Helgesen ◽  
J. P. Hill ◽  
T. R. Thurston ◽  
Doon Gibbs ◽  
J. Kwo ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Magnetic Scattering ◽  
X Ray

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.

Temperature Dependence of Double Shockley Stacking Fault Behavior in Nitrogen-Doped 4h-Sic Studied by In-Situ Synchrotron X-Ray Topography

2020 ◽  
Author(s):  
Fumihiro Fujie ◽  
Shunta Harada ◽  
Kenji Hanada ◽  
Hiromasa Suo ◽  
Haruhiko Koizumi ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Stacking Fault ◽  
X Ray ◽  
Nitrogen Doped ◽  
Fault Behavior

scholarly journals Measurements by x-ray diffraction of the temperature dependence of lattice parameter and crystallite size for isostatically-pressed graphite

Carbon Trends ◽  
2021 ◽  
pp. 100071
Author(s):  
Keith R. Hallam ◽  
James Edward Darnbrough ◽  
Charilaos Paraskevoulakos ◽  
Peter J. Heard ◽  
T. James Marrow ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Crystallite Size ◽  
Lattice Parameter ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals Crystal symmetry lowering in chiral multiferroic Ba3TaFe3Si2O14 observed by x-ray magnetic scattering

2017 ◽  
Vol 95 (20) ◽  
Author(s):  
M. Ramakrishnan ◽  
Y. Joly ◽  
Y. W. Windsor ◽  
L. Rettig ◽  
A. Alberca ◽  
...  
Keyword(s):  
Crystal Symmetry ◽  
Magnetic Scattering ◽  
X Ray

scholarly journals Fe K-edge X-ray resonant magnetic scattering from Ba(Fe1−x Co x )2As2 superconductors

2012 ◽  
Vol 208 (1) ◽  
pp. 157-164 ◽  
Author(s):  
M. G. Kim ◽  
A. Kreyssig ◽  
Y. B. Lee ◽  
R. J. McQueeney ◽  
B. N. Harmon ◽  
...  
Keyword(s):  
Magnetic Scattering ◽  
X Ray

Ferromagnetism and Luminescence of Diluted Magnetic Semiconductors GaGdN and AlGdN

2008 ◽  
Vol 1111 ◽  
Author(s):  
Shuichi Emura ◽  
Masahiro Takahashi ◽  
Hiroyuki Tambo ◽  
Akira Suzuki ◽  
Tetsuya Nakamura ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Magnetic Circular Dichroism ◽  
Peak Position ◽  
Magnetic Characteristics ◽  
Sharp Line ◽  
X Ray ◽  
Diluted Magnetic ◽  
X Ray Absorption

AbstractThe magnetic characteristics of the dilute magnetic system GaGdN are investigated by mainly soft-X-ray magnetic circular dichroism (MCD) in energy range of 1160 – 1240 eV. The strong MCD signals up to 30 % at 15K are observed. The temperature dependence of its intensity is not on simple Curie-Weiss curve and depicts three-step curve. A step around 40 – 100K suggests a new magnetic phase. The luminescence spectrum of GaGdN at low temperature is divided into three parts consisting of two broad bands around 432 nm and 503 nm and a sharp peak at 652 nm. This sharp line is assigned to the intra-transition of f – f orbital owing to the weak temperature dependence of the intensity and peak position. AlGdN grown by molecular beam epitaxy produces luminescence at 318.5 nm. X-ray absorption fine structure is examined to survey the occupancy of the Gd ion in the grown specimens.

Sign in / Sign up

Export Citation Format

Share Document