Andrew Boothroyd: Publications

Textbook

Principles of Neutron Scattering from Condensed Matter

Published by 91̽�� University Press in July 2020

Magnetic ordering in PrBa2Cu3-yAlyO6+x.

Phys Rev B Condens Matter 53:14 (1996) 9382-9395

Authors:

A Longmore, AT Boothroyd, C Changkang, H Yongle, MP Nutley, NH Andersen, H Casalta, P Schleger, AN Christensen

RAMAN-ACTIVE PHONON SOFTENING IN A TL-BA-CA-CU-O SUPERCONDUCTING THIN-FILM

SOLID STATE COMMUNICATIONS 93:9 (1995) 747-752

Authors:

A MUKHERJEE, DZ LIU, AT BOOTHROYD, LY SU, CRM GROVENOR, MJ GORINGE

CRYSTAL FIELDS IN RBA(2)CU(4)O(8) SUPERCONDUCTORS STUDIED BY INELASTIC NEUTRON-SCATTERING

PHYSICA C 235-240 (1994) 1665-1666

Authors:

EA GOREMYCHKIN, BD RAINFORD, DB CURRIE, MT WELLER, AT BOOTHROYD

Abstract:

Neutron spectroscopy has been used to study the crystal field excitation spectra in high quality samples of RBa(2)Cu(4)O(8) high temperature superconductors, with R = Dy, Ho and Er. The samples were prepared under high oxygen pressure. Analysis of the spectra included treatment of the spin-orbit and Coulomb interactions, sad yielded crystal field parameters which showed a high degree of consistency from one rare earth to another.

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.

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.

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