A Study of Spin and Orbital Magnetic Form Factors of CeRh3B2 by X-Ray Magnetic Diffraction

2011 ◽  
Vol 497 ◽  
pp. 3-7 ◽  
Author(s):  
Masahisa Ito ◽  
Ryota Nagayasu ◽  
Tatsuki Tadenuma ◽  
Kosuke Suzuki ◽  
Ayako Sato ◽  
...  
Keyword(s):  
Form Factor ◽  
Form Factors ◽  
Real Space ◽  
Dipole Approximation ◽  
Magnetic Form Factor ◽  
Rare Earth Compound ◽  
X Ray ◽  
Curve Fitting Analysis ◽  
Magnetic Form Factors ◽  
First Time

An experimental method of X-ray magnetic diffraction was applied to the ferromagnetic rare-earth compound CeRh3B2, and its spin and orbital magnetic form factors were measured independently for the first time. Our curve-fitting analysis shows that the orbital magnetic form factor is reproduced by the calculated atomic-model form factor of Ce-4f electrons under the dipole approximation. The comparison of the sum of form factors and the total magnetic form factor measured by the polarized neutron diffraction reveals anisotropic distribution of the magnetic moment in real space.

Spin and Orbital Magnetic Moment of Pd3Co Evaluated by X-Ray Magnetic Diffraction Experiment

2010 ◽  
Vol 459 ◽  
pp. 3-6
Author(s):  
Masahisa Ito ◽  
Yoshiaki Oba ◽  
Ayako Sato ◽  
Kosuke Suzuki ◽  
Tatsuki Tadenuma ◽  
...  
Keyword(s):  
Magnetic Moment ◽  
Reciprocal Lattice ◽  
Form Factors ◽  
Dipole Approximation ◽  
Magnetization Measurement ◽  
Lattice Points ◽  
Diffraction Experiment ◽  
X Ray ◽  
Orbital Magnetic Moment ◽  
Magnetic Form Factors

We have measured spin and orbital magnetic form factors of Pd3Co for various reciprocal lattice points by the X-ray magnetic diffraction. Observed spin and orbital magnetic form factors are fitted by theoretical curves of the isolated atomic model under the dipole approximation. By the fitting analysis we have evaluated separately the spin and orbital component of the magnetic moment of Pd3Co alloy as 2.19 µB/f.u. and 0.83 µB/f.u., respectively. The total magnetic moment 3.02 µB/f.u. is comparable to the value of 2.93 µB/f.u. obtained by the magnetization measurement.

Magnetic Scattering: General Properties

2020 ◽  
pp. 185-212
Author(s):  
Andrew T. Boothroyd
Keyword(s):  
Form Factor ◽  
Partial Response ◽  
Response Function ◽  
Absorptive Part ◽  
Form Factors ◽  
Dipole Approximation ◽  
Magnetic Form Factor ◽  
Magnetic Scattering ◽  
Response Functions ◽  
Fluctuation Dissipation

The basic theory of magnetic scattering is presented. A response function for magnetic scattering is defined, and expressed in terms partial response functions. The relation between the partial response functions and the correlation function for components of the magnetization is obtained, and the dynamical part of the partial reponse functions is linked via the fluctuation-dissipation theorem to the absorptive part of the generalized susceptibility. It is shown how the dipole approximation can be used to simply the magnetic scattering operator for localized electrons, and the magnetic form factor is introduced. Examples of the use of the dipole magnetic form factor, as well as more general anisotropic magnetic form factors, are given. A comparison with the X-ray atomic form factor is given. Various sum rules for the magnetic response function and generalized susceptibility are obtained.

X-Ray Magnetic Diffraction Experiment of Fe3Pt Alloy in Order Phase

2013 ◽  
Vol 534 ◽  
pp. 3-6 ◽  
Author(s):  
Masahiro Naito ◽  
Kenta Hiiragi ◽  
Ayako Sato ◽  
Hiroshi Maruyama ◽  
Masahisa Ito
Keyword(s):  
Curve Fitting ◽  
Magnetic Moments ◽  
Form Factors ◽  
Dipole Approximation ◽  
Theoretical Studies ◽  
Diffraction Experiment ◽  
X Ray ◽  
Pt Alloy ◽  
Curve Fitting Analysis ◽  
Experimental And Theoretical Studies

We have performed X-ray magnetic diffraction experiments of a ferromagnetic binary alloy Fe3Pt in order phase, and have measured separately spin and orbital magnetic form factors. By a curve-fitting analysis in which atomic-model form factors of Fe-3d and Pt-5d electrons under the dipole approximation are assumed, we have obtained the spin and orbital magnetic moments of Fe and Pt atoms separately. The present result is comparable to those of other experimental and theoretical studies, which shows the validity of this experimental method.

NEW RESULTS FROM THE BATES LARGE ACCEPTANCE SPECTROMETER TOROID (BLAST)

2009 ◽  
Vol 18 (02) ◽  
pp. 209-219
Author(s):  
◽  
HAIYAN GAO
Keyword(s):  
Form Factor ◽  
Form Factors ◽  
Magnetic Form Factor ◽  
The Novel ◽  
Hydrogen Deuterium ◽  
Nucleon Form Factors ◽  
Gas Targets ◽  
Large Acceptance ◽  
First Time ◽  
Deuterium Gas

An experiment using the novel technique of scattering a longitudinally polarized electron beam from polarized internal hydrogen/deuterium gas targets was carried out in the South Hall Ring at the MIT-Bates Accelerator Center. The scattered particles were detected by the Bates Large Acceptance Spectrometer Toroid (BLAST) detector. The proton electric to magnetic form factor ratio, [Formula: see text] at Q 2 = 0.1 - 0.65 ( GeV/c )2 has been determined from the experiment by measuring the spin-dependent ep elastic scattering asymmetry in the two symmetric sectors of the BLAST simultaneously for the first time. The neutron electric form factor [Formula: see text] in the same Q2 range has been extracted by measuring the spin-dependent asymmetry from the [Formula: see text] process with a vector polarized deuterium target. These results on the nucleon form factors from the BLAST experiment are presented.

scholarly journals Study of spin and orbital magnetic form factors of CeRh3B2by X-ray magnetic diffraction

2008 ◽  
Vol 64 (a1) ◽  
pp. C572-C572
Author(s):  
T. Tadenuma ◽  
K. Suzuki ◽  
Y. Oba ◽  
K. Kitani ◽  
N. Tsuji ◽  
...  
Keyword(s):  
Form Factors ◽  
X Ray ◽  
Magnetic Form Factors

Magnetic form factors of ferromagnetic iron by X-ray diffraction

1992 ◽  
Vol 65 (1) ◽  
pp. 37-46 ◽  
Author(s):  
S. P. Collins ◽  
D. Laundy ◽  
A. J. Rollason
Keyword(s):  
Form Factors ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ferromagnetic Iron ◽  
Magnetic Form Factors

Study of the internal structure of polymer micelles by anomalous small-angle X-ray scattering at two edges

2013 ◽  
Vol 46 (5) ◽  
pp. 1407-1413 ◽  
Author(s):  
Megumi Sakou ◽  
Atsuro Takechi ◽  
Shin-ichi Murakami ◽  
Kazuo Sakurai ◽  
Isamu Akiba
Keyword(s):  
Spatial Distribution ◽  
Form Factor ◽  
Small Angle ◽  
Form Factors ◽  
Solid Sphere ◽  
Hydrophobic Core ◽  
X Ray ◽  
The Core ◽  
X Ray Scattering ◽  
Ray Scattering

Anomalous small-angle X-ray scattering with two marker elements was applied to the structural analysis of poly(4-vinylphenol rubidium salt)-block-poly(4-bromostyrene) (RbPVPh-b-PBrS) micelles, where Br and Rb were the markers for the hydrophobic core and the hydrated corona, respectively. By using two different markers for the hydrophobic core and the hydrated corona, the form factors of the core and corona were extracted separately from the scattering profile of the whole RbPVPh-b-PBrS micelles. The form factor of the hydrophobic core (the spatial distribution of Br) revealed that the core was regarded as a solid sphere with a smooth surface and a radius of 47 nm. Conversely, the form factor of the spatial distribution of Rb+indicated that the shell of the RbPVPh-b-PBrS micelles was 15 nm thick.

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