TY - JOUR
T1 - General treatment of off-specular resonant soft X-ray magnetic scattering using the distorted-wave Born approximation
T2 - Numerical algorithm and experimental studies with hybrid chiral domain structures
AU - Flewett, Samuel
AU - Burgos-Parra, Erick
AU - Garrido Strelow, MacKarena
AU - Sassi, Yanis
AU - Léveillé, Cyril
AU - Ajejas, Fernando
AU - Reyren, Nicolas
AU - Jaouen, Nicolas
N1 - Funding Information:
We thank Vincent Cross for fruitful discussions during the preparation of this work. S.F. wishes to thank Julián Milano for discussions during the primary phase of development of the algorithm. Financial support from FLAG-ERA SographMEM (ANR-15-GRFL-0005), funding from the Agence Nationale de la Recherche, France, under Grant Agreement No. ANR-17-CE24-0025 (TOPSKY) and Grant No. 18-CE24-0018-01 (SANTA), and the Horizon 2020 Framework Program of the European Commission under FET-Proactive Grant Agreement No. 824123 (SKYTOP) is acknowledged.
Publisher Copyright:
© 2021 American Physical Society.
PY - 2021/5/3
Y1 - 2021/5/3
N2 - We present a numerical algorithm for the simulation of resonant X-ray magnetic scattering in reflection geometry for an arbitrary three-dimensional magnetization distribution over a multilayer sample utilizing the distorted-wave Born approximation. Our approach takes the medium boundary matrix approach for specular reflection, and the Born approximation typically used for off-specular reflection, combines the two, and adds the contribution from transmission through the sample before and after a reflection event. The algorithm is then tested on experimental data from an Al2O3/Co/Pt multilayer sample with hybrid Neél/Bloch/Neél domain walls at incidence angles at and near multilayer Bragg angles, and photon energies near the Co L3 absorption edge, achieving high levels of agreement with experimental data. Incorporating the transmission components into the algorithm was found to explain the dichroism observed in scattering from Bloch-type domain walls, and uncovered the likely importance of diffuse scattering in transmission from the polycrystalline grain walls along the optical path of the x rays in the sample- A theme which deserves further investigation.
AB - We present a numerical algorithm for the simulation of resonant X-ray magnetic scattering in reflection geometry for an arbitrary three-dimensional magnetization distribution over a multilayer sample utilizing the distorted-wave Born approximation. Our approach takes the medium boundary matrix approach for specular reflection, and the Born approximation typically used for off-specular reflection, combines the two, and adds the contribution from transmission through the sample before and after a reflection event. The algorithm is then tested on experimental data from an Al2O3/Co/Pt multilayer sample with hybrid Neél/Bloch/Neél domain walls at incidence angles at and near multilayer Bragg angles, and photon energies near the Co L3 absorption edge, achieving high levels of agreement with experimental data. Incorporating the transmission components into the algorithm was found to explain the dichroism observed in scattering from Bloch-type domain walls, and uncovered the likely importance of diffuse scattering in transmission from the polycrystalline grain walls along the optical path of the x rays in the sample- A theme which deserves further investigation.
UR - http://www.scopus.com/inward/record.url?scp=85106293343&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.103.184401
DO - 10.1103/PhysRevB.103.184401
M3 - Article
AN - SCOPUS:85106293343
VL - 103
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 18
M1 - 184401
ER -