Synthesis and Properties of Cobalt Complexes with [BH] Ligands.

The unusually high oxidation state + IV of cobalt is stabilized by ligands based on [BH] in dark blue colored Cs[Co(BH(OH))]·4.56HO, K[Co(BH(OH))]·2HO, Cs[Co{(BH)(O)(OBOH)}]·4HO and K[Co{(BH)(OBOH)}]·7HO. These compounds were obtained by reacting Co salts with [BH] under alkaline conditions.

Probing the superconducting pairing of the LaBePtalloy via muon-spin spectroscopy.

We report a study of the superconducting pairing of the noncentrosymmetric LaBePtalloy using muon-spin rotation and relaxation (SR) technique. BelowTc=2.4 K, LaBePtexhibits bulk superconductivity (SC), here characterized by heat-capacity and magnetic-susceptibility measurements.

Charge Transfer in Be-Ru Compounds.

During the investigation of the binary system Be-Ru two new phases - Be Ru and Be Ru - with similar compositions (63.6 at. % Be and 63.

Chemical and Physical Properties of YHg and LuHg.

Amalgams have played an important role in fundamental and applied solid-state chemistry and physics because of the diversity of crystallographic features and properties that they have to offer. Moreover, their peculiar chemical properties can sometimes give rise to unconventional superconducting or magnetic ground states. In the current work, we present an in-depth analysis of single crystals of YHg and LuHg (MgCd structure type, space group 6/).

Crystal Chemistry and Physics of UCd.

In the phase diagram U-Cd, only one compound has been identified so far─UCd (space group 3̅). Since the discovery of this material, the physical properties of UCd have attracted a considerable amount of attention. In particular, its complex magnetic phase diagram─as a result of tuning with magnetic field or pressure─is not well-understood.

Superconductivity in Crystallographically Disordered LaHg.

The influence of structural disorder on superconductivity is not yet fully understood. A concurrent examination of crystallographic and physical properties of LaHg reveals that this material enters a superconducting state below = 2.4 K while showing crystallographic disorder in one dimension.

YBePt- a non-centrosymmetric cage superconductor with multi-centre bonding in the framework.

The new ternary compound YBePt was prepared from elements by arc melting, and its crystal structure was determined from single-crystal X-ray diffraction data (space group I4[combining macron]3d, a = 13.4849(3) Å). The material is the first representative of a new structure type of complex intermetallic compounds and reveals a cage-like crystal structure.

In-Cage Interactions in the Clathrate Superconductor Sr Si.

The clathrate I superconductor Sr Si is obtained under high-pressure high-temperature conditions, at 5 GPa and temperatures in the range of 1273 to 1373 K. At ambient pressure, the compound decomposes upon heating at T=796(5) K into Si and SrSi . The crystal structure of the clathrate is isotypic to that of Na Si .

Interplay of Atomic Interactions in the Intermetallic Semiconductor Be Pt.

Semiconducting substances form one of the most important families of functional materials. However, semiconductors containing only metals are very rare. The chemical mechanisms behind their ground-state properties are only partially understood.

Tracking aluminium impurities in single crystals of the heavy-fermion superconductor UBe.

The influence of Al incorporation on the heavy fermion superconductor UBe was investigated to explain the sample dependence of physical properties. Clear evidence for incorporated Al in flux-grown UBe single crystals is presented by results from X-ray diffraction, nuclear magnetic resonance and X-ray spectroscopy. The increase of the lattice parameter and the concomitant change of the superconducting properties are caused by substitution of Be in the compound by 1-2 at.

Spin Dynamics of (Sc[Formula: see text]Lu[Formula: see text])[Formula: see text]In Studied by Electron Spin Resonance.

The electron spin resonance (ESR) of conduction electrons is reported for the weak itinerant ferromagnet Sc[Formula: see text]In which, upon chemical substitution with Lu, shows a suppression of ferromagnetic correlations. A well-defined ESR lineshape of Dysonian type characterizes the spectra. The ESR linewidth, determined by the spin dynamics, displays a broad minimum only for the Sc[Formula: see text]In compound.

High hardness in the biocompatible intermetallic compound β-Ti3Au.

The search for new hard materials is often challenging, but strongly motivated by the vast application potential such materials hold. Ti3Au exhibits high hardness values (about four times those of pure Ti and most steel alloys), reduced coefficient of friction and wear rates, and biocompatibility, all of which are optimal traits for orthopedic, dental, and prosthetic applications. In addition, the ability of this compound to adhere to ceramic parts can reduce both the weight and the cost of medical components.