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We report on the spin densities in CeRuSn determined at elevated and at low temperatures using polarized neutron diffraction. At 285 K, where the CeRuSn crystal structure, commensurate with the CeCoAl type, contains two different…

强关联电子 · 物理学 2016-11-04 K. Prokes , S. Hartwig , A. Gukasov , J. A. Mydosh , Y. -K. Huang , O. Niehaus , R. Pottgen

The low-temperature behavior of Ce2RuZn4 has been investigated. Specific heat and magnetic susceptibility data reveal an antiferromagnetic transition at a Neel temperature of 2 K. Ce2RuZn4 is a static intermediate-valent compound with two…

强关联电子 · 物理学 2008-12-16 Volker Eyert , Ernst-Wilhelm Scheidt , Wolfgang Scherer , Wilfried Hermes , Rainer Poettgen

The superconductor Nb$_3$Sn has a high critical temperature and high critical field, widely used for high-field superconducting magnets. In this work we investigate its microscopic electronic structure with $^{93}$Nb nuclear magnetic…

We report the synthesis and properties of a new layered tetragonal ternary compound CsMn$_4$As$_3$ (structure: KCu$_4$S$_3$-type, space group: $P4/mmm$, No. 123 and $Z = 2$). The material is a small band-gap semiconductor and exhibits an…

强关联电子 · 物理学 2019-04-10 Abhishek Pandey , Saroj L. Samal , David C. Johnston

Neutron powder diffraction (NPD) study of \textit{Ln}MnSbO (\textit{Ln }$=$ La or Ce) reveals differences between the magnetic ground state of the two compounds due to the strong Ce-Mn coupling compared to La-Mn. The two compounds adopt the…

强关联电子 · 物理学 2016-04-20 Qiang Zhang , C. M. N. Kumar , Wei Tian , Kevin W. Dennis , Alan I. Goldman , David Vaknin

Structure and magnetic properties of high-quality polycrystlline CeMnAsO, a parent compound of the "1111"-type oxypnictides, have been investigated using neutron powder diffraction and magnetization measurements. We find that CeMnAsO…

强关联电子 · 物理学 2015-02-24 Qiang Zhang , Wei Tian , Spencer G. Peterson , Kevin W. Dennis , David Vaknin

The 93Nb and 45Sc NMR spectra in PbSc_1/2Nb_1/2O_3 (PSN) and PbMg_1/3Nb_2/3O_3 (PMN) disordered relaxor ferroelectrics at the temperature T > T_0 (T_0 is the temperature of the dielectric susceptibility maximum) have been studied. Spectra…

材料科学 · 物理学 2007-05-23 V. V. Laguta , M. D. Glinchuk , I. P. Bykov , R. Blinc , A. Gregorovic , B. Zalar

We present a new theoretical analysis of the strongly suppressed F- and M-dependent Stark shifts of the Cs ground state hyperfine structure. Our treatment uses third order perturbation theory including off-diagonal hyperfine interactions…

原子物理 · 物理学 2009-11-13 S. Ulzega , A. Hofer , P. Moroshkin , A. Weis

We report new results of a 57Fe M\"ossbauer study of multiferroic 3R-AgFeO2 powder samples performed in a wide temperature range, including two points, TN1 ~ 14 K and TN2 ~ 9 K, of magnetic phase transitions. At the intermediate temperature…

We present a spin density functional theory (DFT) study for semiconducting ScN and Mn-substituted ScN. Their structural and magnetic properties have been investigated using the all electrons augmented spherical wave method (ASW) with a…

材料科学 · 物理学 2009-09-10 Abdesalem Houari , Samir. F. Matar , Mohamed A. Belkhir

The ternary semiconductor AgInTe$_2$ is a thermoelectric material with chalcopyrite-type structure that transforms reversibly into a rocksalt-type structure under high pressure. Nuclear magnetic resonance (NMR) is considered to provide…

We report on detailed low temperature measurements of the magnetization, the specific heat and the electrical resistivity on high quality CeRuSn single crystals. The compound orders antiferromagnetically at $T_{\rm N} = 2.8$ K with the…

强关联电子 · 物理学 2013-09-03 Fikacek jan , Prokleska Jan , Prchal Jiri , Custers Jeroen , Sechovsky Vladimir

The structural and magnetic phase transitions of the ternary iron arsenides SrFe2As2 and EuFe2As2 were studied by temperature-dependent x-ray powder diffraction and 57-Fe Moessbauer spectroscopy. Both compounds crystallize in the tetragonal…

Transmission M\"ossbauer spectra for 14.41-keV transition in 57Fe were obtained for chalcopyrite-type (Cu-Fe-S2) ternary nanocrystals stabilized by long aliphatic chain ligands. These systems could be considered as isolated hard…

Spin noise spectroscopy is an optical technique which can probe spin resonances non-perturbatively. First applied to atomic vapours, it revealed detailed information about nuclear magnetism and the hyperfine interaction. In solids, this…

材料科学 · 物理学 2015-10-21 Steeve Cronenberger , Denis Scalbert , David Ferrand , Hervé Boukari , Joël Cibert

CeRuSn exhibits an extraordinary room temperature structure at 300~K with coexistence of two types of Ce ions, namely trivalent Ce$^{3+}$ and intermediate valent Ce$^{(4-\delta)+}$, in a metallic environment. The ordered arrangement of…

强关联电子 · 物理学 2014-07-23 R. Feyerherm , E. Dudzik , K. Prokes , J. A. Mydosh , Y. -K. Huang , R. Pöttgen

We investigated magnetization, muon spin rotation ($\mu$SR), and $^{119}Sn$ M\"{o}ssbauer spectroscopy on Sn substituted $CuCr_{2-x}Sn_xS_4$ (x=0.03 and 0.08) spinel compounds. The magnetization and $\mu$SR results reveal similar additional…

We report a detailed study of the polymorphic transitions in ternary stannide CeRuSn on high quality single crystals through a combination of X-ray diffraction experiments conducted at 300, 275 and 120 K, and measurements of the thermal…

强关联电子 · 物理学 2015-06-05 J. Fikáček , J. Prokleška , M. Míšek , J. Custers , S. Daniš , J. Prchal , V. Sechovský , I. Císařová

Murunskite (K$_2$FeCu$_3$S$_4$) is a bridging compound between the only two known families of high-temperature superconductors. It is a semiconductor like the parent compounds of cuprates, yet isostructural to metallic iron-pnictides.…

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