Concept

Superparamagnetism

Related publications (213)

Optimization of Bi(2223)/Ag conductors for practical applications

In this paper we report some of the most recent developments of silversheathed (Bi,Pb)2Sr2Ca2Cu3O10 (Bi-2223) tapes that are currently under analysis in view of the potential future applications of these conductors. Various attempts for improving the tape ...

2000

High-temperature magnetic correlations in the 2D S=1/2 antiferromagnet copper formate tetradeuterate

Henrik Moodysson Rønnow

The temperature dependence of the structure factor S(k) of the instantaneous magnetic fluctuations in copper formate tetradeuterate has been investigated using neutron scattering techniques. Our data extend to unprecedently high temperatures (T similar to ...

1999

Nonlinear contributions to dielectric and piezoelectric properties in lead zirconate titanate thin films

Nava Setter, Dragan Damjanovic

The ac field dependence of dielectric and piezoelectric response of sol-gel derived Pb(Zr,Ti)O(3)thin films is presented. The nonlinear response of dielectric polarisation and piezoelectrically induced strain at sub-switching fields was studied in terms of ...

1999

Mechanism of polarization response and dielectric non-linearity of PbMg1/3Nb2/3O3 relaxor ferroelectric

Alexander Tagantsev

The non-linear dielectric properties of single crystals of PbMg1/3Nb2/3O3 relaxer ferroelectric were investigated experimentally by using measurements of the dielectric permittivity of this material as a function of the DC bias and the AC driving fields. T ...

1999

A high resolution magnetization sensor for AC loss measurement on cable-in-conduit conductors

Pierluigi Bruzzone

A special sensor is proposed for magnetization measurement of superconductors with round cross section under pulsed transversal field. The sensor consists of a saddle shaped pick-up coil attached to the cylindrical superconducting sample, with a controlled ...

1998

Domain wall pinning contribution to the nonlinear dielectric permittivity in Pb(Zr, Ti)O-3 thin films

Dragan Damjanovic

The ac field dependence of dielectric response of sol-gel derived Pb(Zr, Ti)O-3 thin films is presented. The analysis of amplitude and phase angle of first and third harmonic of the polarization at subswitching fields shows that a description of the dielec ...

1998

Solution-state NMR studies of the surface structure and dynamics of semiconductor nanocrystals

David Lyndon Emsley

H-1 and C-13 nuclear magnetic resonance (NMR) relaxation studies of thiophenol-capped CdS nanocrystals are presented. The transverse and longitudinal relaxation times were investigated as a function of nanocrystal radius, and the transverse relaxation time ...

AMER CHEMICAL SOC1998

Shadow bands in overdoped Bi2Sr2CaCu2O8+x

Giorgio Margaritondo

We performed angle-resolved photoemission experiments on overdoped single crystal Bi2Sr2CaCu2O8+x samples with Tc values as low as 55K and very narrow transitions as measured by AC susceptibility. The photoemission data indicate the presence of a ''shadow' ...

1997

Progress in understanding VUV photoemission in low-dimensionality systems

Giorgio Margaritondo, Helmuth Berger

High-resolution angle-resolved photoemission and core-level photoemission measurements were performed on single crystal samples of the quasi-one-dimensional material (TaSe4)(2)I and the cuprate superconductor Bi2Sr2CaCu2O8+x. Resistivity measurements were ...

1996

High frequency dielectric relaxation in Pb(Sc1/2Ta1/2)O-3 ceramics

Nava Setter

Pb(Sc1/2Ta1/2)O-3 ceramics have been characterized by dielectric measurements in a wide range of frequencies (10(2)-10(9) Hz). A strong dispersion occurs with two low and high frequency contributions below the transition temperature. Only high frequency re ...

1996

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