Resonant X-ray scattering investigation of the multipolar ordering in Ca3Co2O6 (2008)
Bombardi, A., Mazzoli, C., Agrestini, S., Lees, M. R.
We have performed a resonant x-ray scattering (RXS) study near the Co K edge on a single crystal of Ca3Co2O6. In the magnetically ordered phase a new class of weak reflections appears at the magnetic...
The nature of the magnetic order in Ca3Co2O6 (2008)
Agrestini, S., Chapon, L. C., Daoud-Aladine, A., Schefer, J., Gukasov, A., Mazzoli, C., ...
We present a detailed powder and single crystal neutron diffraction study of the spin chain compound Ca3Co2O6. Below 25 K, the system orders magnetically with a modulated partially disordered...
Incommensurate magnetic ground state revealed by RXS in the frustrated spin system Ca3Co2O6 (2008)
Agrestini, S., Mazzoli, C., Bombardi, A., Lees, M. R.
We have performed a resonant x-ray scattering study at the Co pre-K edge on a single crystal of Ca3Co2O6. The measurements reveal an abrupt transition to a magnetically ordered state immediately...
Nature of magnetic order in Ca3Co2O6 (2008)
Agrestini, S, Chapon, LC, Daoud-Aladine, A, Schefer, J, Gukasov, A, Mazzoli, C, ...
Study of temperature dependent atomic correlations in MgB$_{2}$ (2006)
Campi, G., Cappelluti, E., Proffen, Th., Qiu, X., Bozin, E. S., Billinge, S. J. L., ...
We have studied the evolution with temperature of the local as well as the average crystal structure of MgB$_2$ using the real-space atomic pair distribution function (PDF) measured by high...
Sc substitution for Mg in MgB2: effects on Tc and Kohn anomaly (2004)
Agrestini, S., Metallo, C., Filippi, M., Simonelli, L., Campi, G., Sanipoli, C., ...
Here we report synthesis and characterization of Mg_{1-x}Sc_{x}B_{2} (0.126 K. We find that the Sc doping moves the chemical potential through the 2D/3D electronic topological transition (ETT) in the...
The Tc amplification by "shape resonance" in doped MgB2 (2004)
Bianconi, A., Agrestini, S., Bussmann-Holder, A.
We have applied two channels (sigma and pi) superconductivity model to the Al1-xMgxB2. Using the experimental data, we have calculated the strength of the interchannel pairing due to quantum...
Bianconi, A., Di Castro, D., Agrestini, S., Campi, G., Saini, N. L., Saccone, A., ...
We have studied the variation of Tc with charge density and lattice parameters in Mg1-xAlxB2 superconducting samples at low Al doping x
High Tc superconductivity at a critical strain and charge density in diborides (2001)
Bianconi, A., Saini, N. L., Di Castro, D., Agrestini, S., Campi, G., Saccone, A., ...
We report variation of lattice structure in diborides (AB2) with different A atoms to identify the special case of MgB2 showing high Tc superconductivity. High purity MgB2 (Tc~39 K) has been prepared...