Direct observation of doublek lattice modulation in doublek magnetic structures. The case of CeAl2
(2009) In Journal of Physics: Condensed Matter 21(37). Abstract
 Symmetry analysis is combined with xray scattering experiments to investigate the lattice modulation associated with the incommensurate magnetic structure in the case of a doublek structure. The expansion of the free energy shows that the components of the magnetic structure with propagation vectors k(1) and k(2) can couple via components of lattice modulations. It is shown that the classical diffraction peaks reflecting a 2k propagation vector, associated with magnetoelastic effects in singlek structures, will coexist with diffraction peaks with propagation vectors k(1)  k(2) or k(1) + k(2). The existence of these latter peaks can be considered as a signature of a doublek magnetic structure. In the case of the doublek modulated... (More)
 Symmetry analysis is combined with xray scattering experiments to investigate the lattice modulation associated with the incommensurate magnetic structure in the case of a doublek structure. The expansion of the free energy shows that the components of the magnetic structure with propagation vectors k(1) and k(2) can couple via components of lattice modulations. It is shown that the classical diffraction peaks reflecting a 2k propagation vector, associated with magnetoelastic effects in singlek structures, will coexist with diffraction peaks with propagation vectors k(1)  k(2) or k(1) + k(2). The existence of these latter peaks can be considered as a signature of a doublek magnetic structure. In the case of the doublek modulated structure of CeAl2, group theory is applied directly to the study of the charge modulation. An xray scattering study of the 2k satellites shows that the lattice displacements of the two Ce sites of the structure are antiparallel to each other, and perpendicular to the direction of the magnetic modulation. We also confirm experimentally the existence of k(1) + k(2) satellites. (Less)
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https://lup.lub.lu.se/record/1476234
 author
 Stunault, A. ; Schweizer, J. ; Givord, F. ; Vettier, Christian ^{LU} ; Detlefs, C. ; Boucherle, JX and Lejay, P.
 organization
 publishing date
 2009
 type
 Contribution to journal
 publication status
 published
 subject
 in
 Journal of Physics: Condensed Matter
 volume
 21
 issue
 37
 publisher
 IOP Publishing
 external identifiers

 wos:000269198900031
 scopus:70349565660
 pmid:21832360
 ISSN
 1361648X
 DOI
 10.1088/09538984/21/37/376004
 language
 English
 LU publication?
 yes
 id
 b1696a7f90dc49dc9aedca4f176233b4 (old id 1476234)
 date added to LUP
 20160401 12:55:51
 date last changed
 20210804 02:17:59
@article{b1696a7f90dc49dc9aedca4f176233b4, abstract = {Symmetry analysis is combined with xray scattering experiments to investigate the lattice modulation associated with the incommensurate magnetic structure in the case of a doublek structure. The expansion of the free energy shows that the components of the magnetic structure with propagation vectors k(1) and k(2) can couple via components of lattice modulations. It is shown that the classical diffraction peaks reflecting a 2k propagation vector, associated with magnetoelastic effects in singlek structures, will coexist with diffraction peaks with propagation vectors k(1)  k(2) or k(1) + k(2). The existence of these latter peaks can be considered as a signature of a doublek magnetic structure. In the case of the doublek modulated structure of CeAl2, group theory is applied directly to the study of the charge modulation. An xray scattering study of the 2k satellites shows that the lattice displacements of the two Ce sites of the structure are antiparallel to each other, and perpendicular to the direction of the magnetic modulation. We also confirm experimentally the existence of k(1) + k(2) satellites.}, author = {Stunault, A. and Schweizer, J. and Givord, F. and Vettier, Christian and Detlefs, C. and Boucherle, JX and Lejay, P.}, issn = {1361648X}, language = {eng}, number = {37}, publisher = {IOP Publishing}, series = {Journal of Physics: Condensed Matter}, title = {Direct observation of doublek lattice modulation in doublek magnetic structures. The case of CeAl2}, url = {http://dx.doi.org/10.1088/09538984/21/37/376004}, doi = {10.1088/09538984/21/37/376004}, volume = {21}, year = {2009}, }