X-ray and neutron scattering

Research group

Research theme

Sub department

About

CRYSTAL-FIELD EXCITATION LINEWIDTHS IN (LN(X)Y(1-X))BA2CU3O7 (LN=ER, HO, TM)

PHYSICA C 235-240 (1994) 1707-1708

Authors:

A MUKHERJEE, AT BOOTHROYD, JS GARDNER

Abstract:

We have studied the temperature dependence of crystal field (CF) excitation linewidths of lanthanide ions (Er and Ho) in YBa(2)Cu(3)0(7) by neutron scattering. The Ho data reveal an anomaly in the CF damping around T-c with no evidence of a coherence peak below T-c. We have applied the theory of Becker, Fulde and Keller to derive the reduced s-f coupling constants from the CF linewidth data for the ions Er, Ho and Tm.
More details from the publisher

MAGNETIC ORDER IN PRBA2CU3O6+X

PHYSICA C 235-240 (1994) 1581-1582

Authors:

A LONGMORE, MP NUTLEY, AT BOOTHROYD, NH ANDERSEN, H CASALTA, P SCHLEGER, CK CHEN, H YONGLE, AN CHRISTENSEN

Abstract:

We have studied the magnetic ordering of the Cu and Pr ions in PrBa2Cu3O6+x by neutron diffraction on single crystals with different oxygen contents. Two types of Cu ordering were observed, qualitatively similar to the anti-ferromagnetic phases reported in some studies of YBa2Cu3O6+x. A third magnetic structure was observed below 15K, which we believe corresponds to the magnetic ordering of the Pr sub-lattice.
More details from the publisher

Simultaneous neutron and x-ray refinement of Ortho-II superstructure in YBa2Cu3O6.5

Physica C: Superconductivity and its Applications Elsevier 235 (1994) 1267-1268

Authors:

RA Hadfield, P Schleger, H Casalta, NH Andersen, HF Poulsen, MV Zimmerman, JR Schneider, MT Hutchings, DA Keen, Ruixing Liang, P Dosanjh, WN Hardy
More details from the publisher

High-pressure polymorphism of the copper(I) halides: A neutron-diffraction study to ~10 GPa.

Physical review. B, Condensed matter 50:9 (1994) 5868-5885

Authors:

S Hull, DA Keen
More details from the publisher
More details

Structural disorder in CuBr

Physica B Condensed Matter Elsevier 202:1-2 (1994) 159-166

Authors:

VM Nield, RL McGreevy, DA Keen, W Hayes
More details from the publisher