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Related papers: Antiferro--quadrupolar structures in UPd$_3$ infer…

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Compulsory Dirac multipoles in the bilayer perovskite Ca3Ru2O7 are absent in published analyses of experimental data. In a first step at correcting knowledge of the magnetic structure, we have analysed existing Bragg diffraction patterns…

Strongly Correlated Electrons · Physics 2019-05-08 S W Lovesey , D D Khalyavin , G van der Laan

Neutron diffraction is used to examine the polarization of weak static antiferromagnetism in high quality single crystalline URu2Si2. As previously documented, elastic Bragg-like diffraction develops for temperature T<T_{HO}= 17.5 K at…

Strongly Correlated Electrons · Physics 2015-06-18 K. A. Ross , L. Harriger , Z. Yamani , W. J. L. Buyers , J. D. Garrett , A. A. Menovsky , J. A. Mydosh , C. L. Broholm

Neutron and x-ray diffraction techniques have been used to study the competing long and short-range polar order in the relaxor ferroelectric Pb(Mg$_{1/3}$Nb$_{2/3}$)O$_{3}$ (PMN) under a [111] applied electric field. Despite reports of a…

Materials Science · Physics 2009-11-13 C. Stock , Guangyong Xu , P. M. Gehring , H. Luo , X. Zhao , H. Cao , J. F. Li , D. Viehland , G. Shirane

For the oblique helicoidal structure of the chiral twist-bend nematic-forming mixture of CB7CB/CB6OCB/5CB doped by light-sensitive chiral compound based on azo-fragment, two consequent states of Bragg reflection of the light in the visible…

Soft Condensed Matter · Physics 2024-04-08 H. Bogatyryova , V. Chornous , L. Lisetski , I. Gvozdovskyy

Soft resonant x-ray Bragg diffraction (SRXD) at the Ho M$_{4,5}$ edges has been used to study Ho $4f$ multipoles in the combined magnetic and orbitally ordered phase of HoB$_2$C$_2$. A full description of the energy dependence for both…

Strongly Correlated Electrons · Physics 2015-06-03 A. J. Princep , A. M. Mulders , E. Schierle , E. Weschke , J. Hester , W. D. Hutchison , Y. Tanaka , N. Terada , Y. Narumi , T. Nakamura

X-ray diffraction experiments were performed on polycrystalline and single-crystal specimens of Ce$_{2}$Fe$_{17}$ at temperatures between 10 K and 300 K. Below $T_{\mathrm{t}}$ = 118$\pm$2 K, additional weak superstructure reflections were…

Antiferromagnetic compounds chromium sesquioxide (Cr$_2$O$_3$) and dioxomolybdenum selenite present linear magnetoelectric effects. Anti-inversion symmetry in the corresponding magnetic crystal classes dictate the makeup of magnetic Bragg…

Strongly Correlated Electrons · Physics 2024-07-29 S. W. Lovesey , G. van der Laan

Structural and magnetic transitions in a double perovskite hosting 5d1 Re ions are discussed on the basis of recently published high-resolution x-ray diffraction patterns [D. Hirai, et al., Phys. Rev. Res. 2, 022063(R) (2020)]. A reported…

Strongly Correlated Electrons · Physics 2021-06-30 S. W. Lovesey , D. D. Khalyavin

Structural phase transition accompanying with quadrupolar ordering in DyB4 with Shastry-Sutherland type geometrical frustration has been studied by X-ray diffraction. Previous study [D. Okuyama et al.: J. Phys. Soc. Jpn. 74 (2005) 2434.]…

Strongly Correlated Electrons · Physics 2007-09-17 Daisuke Okuyama , Takeshi Matsumura , Hironori Nakao , Youichi Murakami

The structural changes of TlCoCl$_3$ around phase IV (68 K $<T<$ 75 K) were studied by single-crystal neutron diffraction measurement. The present investigation revealed that a small but definite Bragg peak at (${1/6} {1/6} 2$) appeared…

Materials Science · Physics 2008-08-15 Yoichi Nishiwaki , Akira Oosawa , Tetsuya Kato , Takumi Hasegawa , Haruhiko Kuroe , Kazuhisa Kakurai

We have recently predicted and subsequently verified experimentally by specific heat measurements that EuTiO3 undergoes a structural phase transition at elevated temperature TS = 282 K. The origin of the phase transition has been attributed…

Materials Science · Physics 2012-05-25 J. Köhler , R. Dinnebier , A. Bussmann-Holder

Uranium ions in sesquinitride alpha-U2N3 occupy independent acentric and centrosymmetric sites according to conventional x-ray diffraction patterns [R. Tro\'c, J. Solid State Chem. 13, 14 (1975)]. We submit that polar uranium multipoles in…

Strongly Correlated Electrons · Physics 2023-10-16 Stephen W. Lovesey

Occhialini et al. (arXiv:2510.13767; DOI: 10.1103/yr5q-1v1s) add results to several recent experimental studies of bulk magnetism in the rutile compound RuO_2. It is of interest as a candidate altermagnet. The cited publication contains…

Strongly Correlated Electrons · Physics 2026-04-14 Stephen W. Lovesey

We report Ru L$_3$-edge resonant X-ray diffraction studies on single crystal and (001) epitaxial films of RuO$_2$. We investigate the distinct $\mathbf{Q} = (100)$ and $(001)$ reflections as a function of incident energy, azimuthal angle,…

AxFe2-ySe2 (A=K, Rb, Cs) superconductors may show a complex mixture of structural phases even in a single crystal form. A full sphere of the diffraction intensity has been collected, with the help of synchrotron radiation, for Cs0.8Fe1.6Se2…

We derive an expression for the scattering amplitude of resonant x-ray scattering under the assumption that the Hamiltonian describing the intermediate state preserves spherical symmetry. On the basis of this expression, we demonstrate that…

Strongly Correlated Electrons · Physics 2015-06-25 Tatsuya Nagao , Jun-ichi Igarashi

Structural properties of SmRu$_4$P$_{12}$ in the anomalous magnetic ordered phase between $T^*\sim 14 $ K and $T_{\text{N}}=16.5$ K in magnetic fields has been studied by x-ray diffraction. Atomic displacements of Ru and P, reflecting the…

Strongly Correlated Electrons · Physics 2016-12-09 T. Matsumura , S. Michimura , T. Inami , K. Fushiya , T. D. Matsuda , R. Higashinaka , Y. Aoki , H. Sugawara

A theoretical investigation of a plausible construct for electronic structure in iridate perovskites demonstrates the existence of magnetic multipoles hitherto not identified. The strange multipoles, which are parity-even, time-odd and even…

Strongly Correlated Electrons · Physics 2014-05-15 S W Lovesey , D D Khalyavin

The structural transformation of multiferroic EuTiO$_3$ has been intensively investigated by synchrotron x-ray diffraction at pressures up to 50.3 GPa and temperatures from 50 to 500 K. An antiferrodistortive phase transition from cubic…

Materials Science · Physics 2015-08-12 P. Parisiades , E. Liarokapis , J. Köhler , A. Bussmann-Holder , M. Mezouar

X-ray diffraction, dynamical mechanical analysis and infrared reflectivity studies revealed an antiferrodistortive phase transition in EuTiO3 ceramics. Near 300K the perovskite structure changes from cubic Pm-3m to tetragonal I4/mcm due to…