Magnetic excitations in the spin ladder system (VO){sub 2}P{sub 2}O{sub 7}

Journal Article · Tue Apr 01 04:00:00 EST 1997 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.364908· OSTI ID:496422

Garrett, A W ^[1]; Nagler, S E ^[2]; Barnes, T ^[3]; Sales, B C ^[2]

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1. Department of Physics, University of Florida, Gainesville, Florida 32611-0448 (United States)
2. Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6393 (United States)
3. Theoretical and Computational Physics Section, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6373 (United States)

We present the results of elastic and inelastic neutron scattering measurements made on a powder sample of the spin-ladder compound (VO){sub 2}P{sub 2}O{sub 7}. The elastic scattering measurements made at a temperature of 10 K showed no magnetic structure, consistent with a singlet ground state. The inelastic measurements, also at 10 K, revealed three magnetic modes at 3.5, 6.0, and 14 meV. Theoretical treatments of spin ladder models point to an identification of the 3.5 meV mode as the minimum in the one-magnon dispersion, and the 14 meV mode as the local minimum in the associated two-magnon continuum. However, we have been unable to explain the scattering at 6.0 meV using existing theories of spin ladders. {copyright} {ital 1997 American Institute of Physics.}

• Research Organization: Oak Ridge National Laboratory
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 496422
• Report Number(s): CONF-961141--
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
ANTIFERROMAGNETIC MATERIALS
ELASTIC SCATTERING
EXCITATION
GROUND STATES
INELASTIC SCATTERING
MAGNETIC PROPERTIES
MAGNONS
NEUTRON DIFFRACTION
ORNL
PHOSPHATES
SPIN ORIENTATION
TEMPERATURE RANGE 0000-0013 K
VANADIUM COMPOUNDS
VANADIUM OXIDES