Title

Resonant Neutron Scattering from YBa2Cu3O7

Abstract

We have developed a new scattering geometry for magnetic neutron scattering experiments on YBa2Cu3O7 in which the phonon background around q ~ ( π a, π a), ω ~ 40meV is significantly reduced. We use this new approach to study the previously detected sharp magnetic excitation at ~ 40meV in the superconducting state in detail. The excitation does not shift substantially in energy up to at least 75K. (~0.8Tc). Polarized neutron scattering experiments (horizontal minus vertical field) confirm the magnetic origin of the 40meV excitation and put stringent limits on the magnetic scattering intensity in the normal state.

Department(s)

Materials Science and Engineering

Keywords and Phrases

Geometry; Magnetic properties; Magnetic resonance; Magnetrons; Neutron scattering; Phonons; Polarization; Thermal effects; Magnetic excitation; Magnetic scattering intensity; Oxide superconductors

International Standard Serial Number (ISSN)

223697

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1995 Elsevier, All rights reserved.


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