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Related papers: Superexchange interactions in AgMF4 (M = Co, Ni, C…

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Magnetic properties of $M_{c}$Ta$_{2}$S$_{2}$C ($M$ = Fe, Co, Ni, Cu) have been studied using SQUID DC and AC magnetic susceptibility. In these systems magnetic $M^{2+}$ ions are intercalated into van der Waals gaps between adjacent S…

Superconductivity · Physics 2008-10-02 Masatsugu Suzuki , Itsuko S. Suzuki , Jürgen Walter

We predict Co-based chalcogenides with a diamond-like structure can host unconventional high temperature superconductivity (high-$T_c$). The essential electronic physics in these materials stems from the Co layers with each layer being…

Superconductivity · Physics 2018-10-31 Jiangping Hu , Yuhao Gu , Congcong Le

This work explores the static and dynamic magnetic properties of weakly antiferromagnetically coupled Fe/Ti superlattices, emphasizing the link between magnetic behavior and structural characteristics. HRTEM and XRD analyses confirm…

We investigate the electronic and magnetic structures of the 122 (AM$_2$B$_2$) hexagonal transition-metal pnictides with A=(Sr, Ca), M=(Cr, Mn, Fe, Co, Ni) and B=(As, P, Sb). It is found that the family of materials share critical…

Superconductivity · Physics 2017-11-21 Jinfeng Zeng , Shengshan Qin , Congcong Le , Jiangping Hu

We report a variation with temperature ($T$) of the effective interdimeric interaction $J^\prime_{\mathrm{eff}}$ in the antiferromagnetic (AFM) copper dimeric organic compound Cu$_2$[TzTs]$_4$ [N-thiazol-2-yl-toluenesulfonamidate…

Other Condensed Matter · Physics 2017-08-23 Rafael Calvo , Vinicius T. Santana , Otaciro R. Nascimento

We synthesized a series of GdFe$_{1-x}$Co$_x$AsO polycrystalline samples ($0 \leq x \leq 1$) by using a solid state reaction method and present a systematic study on the physical properties by means of electrical resistivity $\rho(T)$,…

Strongly Correlated Electrons · Physics 2013-03-27 T. Shang , L. Yang , N. Cornell , F. Ronning , Y. Chen , L. Jiao , J. Chen , A. Howard , J. D. Thompson , A. Zakhidov , M. B. Salamon , H. Q. Yuan

We report on the study of electron transport in the oxide heterostructures with superconductor/magnetic matter (S/M) interfaces where anomaly large penetration of superconducting correlations in magnetic matter (proximity effect) is…

The effect of Ag addition (0-20 wt%) on polycrystalline Sr0.6K0.4Fe2As2 superconductor has been investigated. It is found that the critical transition temperature Tc was not depressed, and the irreversibility field Hirr and hysteresis…

Superconductivity · Physics 2015-05-13 Lei Wang , Yanpeng Qi , Xianping Zhang , Zhaoshun Gao , Dongliang Wang , Yanwei Ma

Natural superlattice structures $\rm{(MnBi_2Te_4)(Bi_2Te_3)}$$_n$ ($n$ = 1, 2,...), in which magnetic $\rm{MnBi_2Te_4}$ layers are separated by nonmagnetic $\rm{Bi_2Te_3}$ layers, hold band topology, magnetism and reduced interlayer…

The doubly ionized $d^9$ copper ion provides, originally in La$_2$CuO$_4$ and later in many more compounds, the platform for high temperature superconductivity when it is forced toward higher levels of oxidation. The nearest chemical…

Materials Science · Physics 2015-01-21 Yundi Quan , Warren E. Pickett

Honeycomb layered oxides with monovalent or divalent, monolayered cationic lattices generally exhibit myriad crystalline features encompassing rich electrochemistry, geometries and disorders, which particularly places them as attractive…

Silver (Ag) coatings have been widely used in many industry areas due to their excellent conductivity. However, wider applications of Ag coatings have been hindered by their poor mechanical properties. In this research, to improve the…

Materials Science · Physics 2017-12-06 Yuxin Wang , See Leng Tay , Xiaowei Zhou , Caizhen Yao , Wei Gao , Guang Cheng

The Ag ion in the recently synthesized novel material Ag2NiO2 adopts an extremely unusual valency of 1/2, leaving the Ni ion as 3+, rather than the expected 2+. Using first principles calculations, we show that this mysterious subvalent…

Materials Science · Physics 2009-11-11 M. D. Johannes , S. Streltsov , I. I. Mazin , D. I. Khomskii

We report an investigation of the structural and electronic properties of hybrid superconductor/ferromagnet (S/F) bilayers of composition Nb/Cu$_{60}$Ni$_{40}$ prepared by magnetron sputtering. X-ray and neutron reflectometry show that both…

Strongly Correlated Electrons · Physics 2015-12-07 Yu. Khaydukov , R. Morari , O. Soltwedel , T. Keller , G. Christiani , G. Logvenov , M. Kupriyanov , A. Sidorenko , B. Keimer

The electronic origin of the huge magnetostructural effect in layered Fe-As compounds is elucidated using LiFeAs as a prototype. The crucial feature of these materials is the strong covalent bonding between Fe and As, which tends to…

Materials Science · Physics 2008-12-19 K. D. Belashchenko , V. P. Antropov

Many-body interactions in metal-organic frameworks are fundamental for emergent quantum physics. Unlike their solution counterpart, magnetization at surfaces in low-dimensional analogues is strongly influenced by magnetic anisotropy induced…

The magnetic nature of Cs$_{2}$AgF$_{4}$, an isoelectronic and isostructural analogue of La$_2$CuO$_4$, is analyzed using density functional calculations. The ground state is found to be ferromagnetic and nearly half metallic. We find…

Materials Science · Physics 2009-11-11 Deepa Kasinathan , A. B. Kyker , D. J. Singh

In this study, the crystal structure and magnetic properties of La$_{2-x} A'_{x}$Ni$_{7}$ compounds with magnetic rare earth elements ($A$' = Sm, Gd) have been investigated combining X-ray powder diffraction and magnetic measurements. These…

Magnetic properties of Ga$_{1-x}$Mn$_x$N are studied theoretically by employing a tight binding approach to determine exchange integrals $J_{ij}$ characterizing the coupling between Mn spin pairs located at distances $R_{ij}$ up to the 16th…

Materials Science · Physics 2014-07-14 C. Simserides , J. A. Majewski , K. N. Trohidou , T. Dietl

Understanding the effect of chemical composition on the strength of magnetic interactions is key to the design of magnets with stronger exchange interactions. The magnetic divalent first-row transition metal (TM) thiocyanates are a class of…