Low Lying Spin Excitation in the Spin Ice Ho2Ti2O7

Conference · Wed Dec 01 00:00:00 EST 2010

DOI:https://doi.org/10.1088/1742-6596/251/1/012003· OSTI ID:1000709

Ehlers, Georg  ^[1]; Mamontov, Eugene  ^[1]; Zamponi, Michaela M. ^[1]; Gardner, Jason S. ^[1]

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1. ORNL

The high flux and low background of the new backscattering spectrometer at the SNS combine to produce an excellent signal to noise ratio, allowing us to investigate a low lying weak excitation never seen before in the spin ice, Ho{sub 2}Ti{sub 2}O{sub 7}. This non-dispersive excitation has been observed at E = 26.3 {mu}eV below 100 K but is resolution limited only below {approx}65 K. It is indifferent to magnetic fields below {mu}{sub 0}H = 4.5 T, at 1.6 K. These characteristics help us to identify the excitation as due to the nuclear spin system.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1000709
• Resource Relation: Journal Volume: 251; Conference: ICNS 2009 - Knoxville, Tennessee, United States of America - 5/2/2009 12:00:00 AM-
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BACKSCATTERING
EXCITATION
MAGNETIC FIELDS
NEUTRONS
RESOLUTION
SCATTERING
SIGNAL-TO-NOISE RATIO
SPECTROMETERS
SPIN