The Mössbauer spectra of nanoferrite materials such as Ni0.25Mn0.75Fe2O4, Co0.5Mn0.5Fe2O4 and Ni0.4Co0.6Fe2O4 have been reported and the above materials were prepared by sol-gel combustion method using metal nitrates as source material and Polyvinyl alcohol(PVA) as...

EPR parameters for atomic hydrogen in three nonequivalent special positions at the twofold axis of the monoclinic structure of brazilianite, formed by X-ray irradiation at room temperature, are reported. The ^-factors are practically isotropic and close to the free electron value, but the hyperfine splittings exhibit considerable anisotropy. One of the centers shows an additional doublet splitt...

Recent studies related to quantum computation suggest a need for developing a well-characterized low-spin, e.g., S = 1/2, metal complex with limited or no significant hyperfine interactions. To this end, we here report the synthesis, crystal structure and magnetic and thermodynamic characterization of ammonium peroxychromate, (NH4)3CrO8, a new compound of Cr(5+), with a 3dx2 y2 , S = 1/2 ground...

We present a direct spectroscopic observation of a shallow hydrogenlike muonium state in SrTiO(3) which confirms the theoretical prediction that interstitial hydrogen may act as a shallow donor in this material. The formation of this muonium state is temperature dependent and appears below ∼ 70K. From the temperature dependence we estimate an activation energy of ∼ 50 meV in the bulk and ∼ 23 m...

We numerically study the hyperfine induced nuclear spin dynamics in a system of two coupled quantum dots in zero magnetic field. Each of the electron spins is considered to interact with an individual bath of nuclear spins via homogeneous coupling constants (all coupling coefficients being equal). In order to lower the dimension of the problem, the two baths are approximated by two single long ...

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 approach has been limited to carriers in semiconductor heterostructures. Here we show that atomic-like spin fluctuations of Mn ions diluted in CdTe (bulk and qu...

2014 The effects of configuration interaction on hyperfine structure (hfs) are considered using second-order perturbation theory. Following a first paper which deals with lN configurations, this paper concerns the case of lN l’ configurations. Effective operators, which describe the crossed second-order effects of electrostatic and hyperfine interactions, are given for all types of excitations....

Abstract. We describe how to design a large class of always on spin−1 interactions between polar molecules trapped in an optical lattice. The spin degrees of freedom correspond to the hyperfine levels of a ro-vibrational ground state molecule. Interactions are induced using a microwave field to mix ground states in one hyperfine manifold with the spin entangled dipoledipole coupled excited stat...

The hyperfine-state population of hydrogen after the bound-beta decay of the neutron directly yields the neutrino left-handedness or a possible right-handed admixture and possible small scalar and tensor contributions to the weak force. Using the through-going beam tube of a high-flux reactor, a background free hydrogen rate of ca. 3 s can be obtained. The detection of the neutral hydrogen atom...

We study a Heavy Hybrid Meson system, which is composed of a heavy quark-antiquark pair and a non-trivial contribution coming from the gluon field. The framework of the study is the strong interaction, described by QCD, in the special case where the mass of the quarks is heavy, and much higher than the energies of the gluonic field, which will let us assume a non-Relativistic case and work with...