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Pronounced anisotropy of magnetic properties and complex magnetic order of a new oxi-halide compound Co7(TeO3)4Br6 has been investigated by powder and single crystal neutron diffraction, magnetization and ac susceptibility techniques.…

Materials Science · Physics 2013-05-29 M. Prester , I. Zivkovic , O. Zaharko , D. Pajic , P. Tregenna-Piggott , H. Berger

The title quasi-1D copper oxides (0=< x =<0.4) were investigated by neutron diffraction and magnetic susceptibility studies. Polyhedral CuO4 units in the compounds were found to comprise linear-chains at inter-chain distance of…

Superconductivity · Physics 2009-11-07 K. Yamaura , Q. Huang , E. Takayama-Muromachi

By combining inelastic neutron scattering and numerical simulations, we study the quasi-one dimensional Ising-like quantum antiferromagnet BaCo$_{2}$V$_{2}$O$_{8}$ in a longitudinal magnetic field applied along the magnetic anisotropy axis,…

We investigated the crystal and magnetic structures of the spin-1/2 frustrated antiferromagnet Cu3Mo2O9 in which the spin system consists of antiferromagnetic chains and dimers. The space group at room temperature has been reported to be…

The phase diagram of Ca$_{2-x}$Sr$_x$RuO$_4$ has been studied by neutron diffraction on powder and single-crystalline samples. The experiments reveal antiferromagnetic order and structural distortions characterized by tilts and rotations of…

Superconductivity · Physics 2009-10-31 O. Friedt , M. Braden , G. Andre , P. Adelmann , S. Nakatsuji , Y. Maeno

In this paper, we report on the magnetic properties of Ba2CoS3, a spin-chain compound recently found to be the first Co2+ containing one-dimensional sulphide to show metallic-like conductivity and negative magnetoresistance. We carried out…

Co$_3$Sn$_2$S$_2$ has recently been predicted to be a Weyl semimetal in which magnetic order is key to its behavior as a topological material. Here we report unpolarized neutron diffraction and spherical neutron polarimetry measurements,…

The proximity effect of a C-type antiferromagnet (C-AFM) with the spin canting at low temperature is investigated in the hybrid Nd0.35Sr0.65MnO3(NSCO)/YBa2Cu3O7(YBCO) oxide system through magnetic and transport measurements. It is found…

Superconductivity · Physics 2009-11-13 Awadhesh Mani , T. Geetha Kumary , Daniel Hsu , J. G. Lin , Chyh-Hong Chern

We present an experimental study of macroscopic and microscopic magnetic anisotropy of a spin tetramer system SeCuO$_3$ using torque magnetometry and ESR spectroscopy. Large rotation of macroscopic magnetic axes with temperature observed…

Strongly Correlated Electrons · Physics 2014-05-20 Mirta Herak , Antonija Grubišić Čabo , Dijana Žilić , Boris Rakvin , Krešimir Salamon , Ognjen Milat , Helmuth Berger

We investigate magnetic properties of the $s$ = 1/2 compound K$_{2}$Cu$_{3}$(MoO$_{4}$)$_{4}$ by combining magnetic susceptibility, magnetization, specific heat, and electron spin resonance (ESR) with density functional calculations. Its…

Density functional calculations are performed to study the magnetic order of the severely distorted square planar cupric oxide (CuO) and local spin disorder in it in the presence of the transition metal impurities M (= Cr, Mn, Fe, Co and…

Strongly Correlated Electrons · Physics 2017-04-05 B. G. Ganga , P. N. Santhosh , B. R. K. Nanda

The alloy Ca$_{2-x}$Sr$_x$RuO$_4$ exhibits a complex phase diagram with peculiar magnetic metallic phases. In this paper some aspects of this alloy are discussed based on a mean field theory for an effective Kugel-Khomskii model of…

Strongly Correlated Electrons · Physics 2007-05-23 Manfred Sigrist , Matthias Troyer

We have performed field-swept 59Co NMR measurements on the 'exotic' spin-chain material, Ca3Co2O6, crystallizing in K4CdCl6-type rhombohedral structure, believed to exhibit two magnetic transition temperatures (around 24 and 12 K). This is…

Strongly Correlated Electrons · Physics 2009-11-10 E. V. Sampathkumaran , N. Fujiwara , S. Rayaprol , P. K. Madhu , Y. Uwatoko

CuSiO_3, isotypic to the spin - Peierls compound CuGeO_3, was discovered recently as a metastable decomposition product of the silicate mineral dioptase, Cu_6Si_6O_{18}\cdot6H_2O. We investigated the physical properties of CuSiO_3 using…

Strongly Correlated Electrons · Physics 2009-10-31 M. Baenitz , C. Geibel , M. Dischner , G. Sparn , F. Steglich , H. H. Otto , M. Meibohm , A. A. Gippius

La$_4$Cu$_3$MoO$_{12}$ is a cluster antiferromagnet where copper spin-1/2 form a network of st rongly coupled spin-trimers. The magnetic properties of this material have bee n examined using magnetic neutron scattering. At low temperatures,…

Strongly Correlated Electrons · Physics 2007-05-23 Y. Qiu , C. Broholm , S. Ishiwata , M. Azuma , M. Takano , R. Bewley , W. J. L. Buyers

A single-crystal sample of the frustrated quasi one-dimensional quantum magnet Cs$_{2}$Cu$_{2}$Mo$_{3}$O$_{12}$ is investigated by magnetic and thermodynamic measurements.A combination of specific heat and magnetic torque measurements maps…

Strongly Correlated Electrons · Physics 2020-06-09 D. Flavián , S. Hayashida , L. Huberich , D. Blosser , K. Yu. Povarov , Z. Yan , S. Gvasaliya , A. Zheludev

The magnetic structure of the edge sharing cuprate compound Li2CuO2 has been investigated by means of ab initio electronic structure calculations. The first and second neighbor in-chain magnetic interactions are calculated to be -142 K and…

Materials Science · Physics 2007-05-23 Coen de Graaf , Iberio de P. R. Moreira , Francesc Illas , Oscar Iglesias , Amilcar Labarta

Resistivity, magnetic susceptibility, neutron scattering and x-ray crystallography measurements were used to study the evolution of magnetic order and crystallographic structure in single-crystal samples of the Ba1-xSrxFe2As2 and…

Superconductivity · Physics 2012-09-06 K. Kirshenbaum , N. P. Butch , S. R. Saha , P. Y. Zavalij , B. G. Ueland , J. W. Lynn , J. Paglione

Alkali superoxide CsO2 is one of candidates for the spin-1/2 one-dimensional (1D) antiferromagnet, which may be sequentially caused by an ordering of the pi-orbital of O2- molecule below TS ~ 70 K. Here, we report on the magnetism in powder…

Magnetic properties of a quasi one-dimensional magnet CuV_2O_6 have been studied by means of susceptibility measurement, NMR and powder neutron diffraction. Cu^{2+} spins (S=1/2) order antiferromagnetically below 22.6 K, and the saturation…

Strongly Correlated Electrons · Physics 2009-10-31 Jun Kikuchi , Kazuhiro Ishiguchi , Kiyoichiro Motoya , Masayuki Itoh , Kazunori Inari , Naotoshi Eguchi , Jun Akimitsu