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The (SrTiO$_3$)$_m$/(SrVO$_3$)$_n$ $d^0-d^1$ multilayer system is studied with first principles methods through the observed insulator-to-metal transition with increasing thickness of the SrVO$_3$ layer. When correlation effects with…

Strongly Correlated Electrons · Physics 2015-05-19 Victor Pardo , Warren E. Pickett

A detailed investigation of Ba$_2$MnGe$_2$O$_7$ was performed in its low-temperature magnetoelectric state combining neutron diffraction with magnetization measurements on single crystals. In the paramagnetic state at 10 K, polarized…

Strongly Correlated Electrons · Physics 2023-03-07 A. Sazonov , H. Thoma , R. Dutta , M. Meven , A. Gukasov , R. Fittipaldi , V. Granata , T. Masuda , B. Náfrádi , V. Hutanu

Single crystal neutron diffraction is used to investigate the magnetic and structural phase diagram of the electron doped superconductor Ba(Fe$_{1-x}$Co$_x$)$_2$As$_2$. Heat capacity and resistivity measurements have demonstrated that Co…

We present the low-temperature magnetic structures of SrGd$_2$O$_4$ combining neutron diffraction methods on polycrystalline and single-crystal samples containing the $^{160}$Gd isotope. In contrast to other members of the Sr$Ln_2$O$_4$…

Strongly Correlated Electrons · Physics 2022-02-02 N. Qureshi , B. Z. Malkin , S. X. M. Riberolles , C. Ritter , B. Ouladdiaf , G. Balakrishnan , M. Ciomaga Hatnean , O. A. Petrenko

We investigated the series of temperature and field-driven transitions in LuFe$_2$O$_4$ by optical and M\"{o}ssbauer spectroscopies, magnetization, and x-ray scattering in order to understand the interplay between charge, structure, and…

Strongly Correlated Electrons · Physics 2008-11-28 X. S. Xu , M. Angst , T. V. Brinzari , R. P. Hermann , J. L. Musfeldt , A. D. Christianson , D. Mandrus , B. C. Sales , S. McGill , J. -W. Kim , Z. Islam

We report polarized and unpolarized neutron scattering measurements of the magnetic order in single crystals of Na0.5CoO2. Our data indicate that below T_N=88 K the spins form a novel antiferromagnetic pattern within the CoO2 planes,…

Strongly Correlated Electrons · Physics 2009-11-11 G. Gasparovic , R. A. Ott , J. -H. Cho , F. C. Chou , Y. Chu , J. W. Lynn , Y. S. Lee

The magnetic and iron vacancy orders in superconducting (Tl,Rb)2Fe4Se5 single-crystals are investigated by using a high-pressure neutron diffraction technique. Similar to the temperature effect, the block antiferromagnetic order gradually…

In the R1/2D1/2MnO3 manganites (R: rare earth, D: divalent cation), the structural phase transition at Tco is commonly interpreted as a concomitant charge and orbital ordering (CO/OO) process driven by a cooperative Jahn-Teller effect and…

Strongly Correlated Electrons · Physics 2007-05-23 A. Daoud-Aladine , J. Rodriguez-Carvajal , L. Pinsard-Gaudart , M. T. Fernandez-Diaz , A. Revcolevschi

The magnetic structure of the "nonmetallic metal" FeCrAs, a compound with the characters of both metals and insulators, was examined as a function of temperature using single-crystal neutron diffraction. The magnetic propagation vector was…

Strongly Correlated Electrons · Physics 2019-11-21 W. T. Jin , M. Meven , H. Deng , Y. Su , W. Wu , S. R. Julian , Young-june Kim

The magnetic order of EuIr$_4$In$_2$Ge$_4$, which crystallizes in a Dresselhaus-type noncentrosymmetric tetragonal structure, was investigated using two complementary single-crystal neutron diffraction approaches. Time-of-flight…

Strongly Correlated Electrons · Physics 2026-04-14 Chihiro Tabata , Koji Kaneko , Akiko Nakao , Takashi Ohhara , Tatsuma D. Matsuda , Yoshichika Ōnuki

We present a study of the magnetic-field effect on spin correlations in the charge ordered triangular Ising system LuFe2O4+{\delta} through single crystal neutron diffraction. In the absence of a magnetic field, the strong diffuse neutron…

Motivated by the recent neutron diffraction experiment on $YVO_3$, we consider a microscopic model where each $V^{3+}$ ion is occupied by two 3d electrons of parallel spins with two fold degenerate orbital configurations. The mean field…

Strongly Correlated Electrons · Physics 2007-05-23 Theja N. De Silva , Anuvrat Joshi , Michael Ma , Fu Chun Zhang

We present neutron scattering data on two single crystals of the high temperature superconductor La2-x(Ca,Sr)xCaCu2O6+delta. The Ca0.1-doped crystal exhibits a long-range antiferromagnetically ordered ground state. In contrast, the…

Superconductivity · Physics 2011-10-28 M. Huecker , Young-June Kim , G. D. Gu , B. D. Gaulin , J. W. Lynn , J. M. Tranquada

We present a neutron triple-axis and resonant spin-echo spectroscopy study of the spin correlations in untwinned YBCO crystals with x= 0.3, 0.35, and 0.45 as a function of temperature and magnetic field. As the temperature T approaches 0,…

Strongly Correlated Electrons · Physics 2015-05-19 D. Haug , V. Hinkov , Y. Sidis , P. Bourges , N. B. Christensen , A. Ivanov , T. Keller , C. T. Lin , B. Keimer

The low-temperature magnetic structure of NdFeAsO has been revisited using neutron powder diffraction and symmetry analysis using the Sarah representational analysis program. Four magnetic models with one magnetic variable for each of the…

Superconductivity · Physics 2012-06-08 A. Marcinkova , T. C. Hansen , J. W. G. Bos

The charge and orbital ordering in Pr_{0.5} Ca_{0.5} MnO_3 is studied for the first time by ^{17}O NMR. This local probe is sensitive to spin, charge and orbital correlations. Two transitions exist in this system: the charge and orbital…

Strongly Correlated Electrons · Physics 2009-11-07 A. Yakubovskii , A. Trokiner , S. Verkhovskii , A. Gerashenko , D. Khomskii

Results of muon spin relaxation ($\mu$SR) and neutron powder diffraction measurements on a reentrant superconductor Eu(Fe$_{0.86}$Ir$_{0.14}$)$_2$As$_2$ are presented. Eu(Fe$_{0.86}$Ir$_{0.14}$)$_2$As$_2$ exhibits superconductivity at…

We present a detailed powder and single crystal neutron diffraction study of the spin chain compound Ca3Co2O6. Below 25 K, the system orders magnetically with a modulated partially disordered antiferromagnetic structure. We give a…

Strongly Correlated Electrons · Physics 2008-09-17 S. Agrestini , L. C. Chapon , A. Daoud-Aladine , J. Schefer , A. Gukasov , C. Mazzoli , M. R. Lees , O. A. Petrenko

We carried out detailed studies of the magnetic structure, magnetoelastic coupling, and thermal properties of EuCrO$_3$ nano-powders from room temperature to liquid helium temperature. Our neutron powder diffraction and X-ray powder…

Strongly Correlated Electrons · Physics 2016-04-07 M. Taheri , F. S. Razavi , Z. Yamani , R. Flacau , P. G. Reuvekamp , A. Schulz , R. K. Kremer

Neutron diffraction studies have been carried out in the applied magnetic field H(//[011]) on a single crystal of pyrochlore ferromagnet Nd2Mo2O7, whose Hall resistivity(r_H) has been reported to have quite unusual magnetic field (H)- and…

Strongly Correlated Electrons · Physics 2009-11-07 Yukio Yasui , Satoshi Iikubo , Hiroshi Harashina , Taketomo Kageyama , Masafumi Ito , Masatoshi Sato , Kazuhisa Kakurai
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