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Influence of static Jahn-Teller distortion on the magnetic excitation spectrum of PrO2:: A synchrotron x-ray and neutron inelastic scattering study

PHYSICAL REVIEW B 76:13 (2007) ARTN 134419

Authors:

CH Webster, LM Helme, AT Boothroyd, DF McMorrow, SB Wilkins, C Detlefs, B Detlefs, RI Bewley, MJ McKelvy
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Terahertz-frequency conductivity of charge stripes in the antiferromagnet La5/3Sr1/3NiO4

(2007) 852-853

Authors:

J Lloyd-Hughes, D Prabhakaran, E Castro-Camus, AT Boothroyd, MB Johnston

Abstract:

We report the complex refractive index of La5/3Sr1/3NiO4 over the terahertz frequency range, obtained using time-domain spectroscopy. Negligible change in the complex refractive index with magnetic flux densities up to 6T was seen, while changes were observed as the lattice temperature was increased from 1.5 K to the charge-ordering temperature at 220 K. The terahertz frequency response therefore originates from the dielectric function rather than the magnetic permeability.
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Phase separation, memory effects, and magnetization steps in single crystalline La1.1 Sr1.9 Mn2 O7

Physical Review B - Condensed Matter and Materials Physics 74:13 (2006)

Authors:

S Nair, AK Nigam, AV Narlikar, D Prabhakaran, A Boothroyd

Abstract:

The magnetic ground state of a single crystalline bilayered manganite La1.1 Sr1.9 Mn2 O7 is investigated using bulk magnetic measurements. Besides large relaxation times, memory effects reminiscent of that seen in spin glasses are also observed both in the field cooled and zero field cooled measurement protocols. These indicate that this system is not a canted antiferromagnet as was reported earlier, but on the contrary has an inhomogenous magnetic ground state arising as a consequence of phase separation. We also report the observation of sharp metamagnetic steps in this bilayered manganite, similar to that seen in phase separated three-dimensional perovskites. © 2006 The American Physical Society.
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Dynamics from diffraction

Physica B Condensed Matter Elsevier 385 (2006) 285-287

Authors:

Andrew L Goodwin, Matthew G Tucker, Elizabeth R Cope, Martin T Dove, David A Keen
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Evaluation of a comprehensive integrated workplace-based program to reduce occupational musculoskeletal injury and its associated morbidity in a large hospital.

Journal of occupational and environmental medicine 48:11 (2006) 1159-1165

Authors:

Maziar Badii, Dave Keen, Shicheng Yu, Annalee Yassi

Abstract:

Objective

The objective of this study was to investigate the effectiveness of an integrated workplace-based program to reduce musculoskeletal injuries (MSIs) and the impact of those injuries in healthcare workers.

Methods

A pre-/postintervention with concurrent control study design was applied-3 years of data before the program with 1 year of data during the program.

Results

Time-loss (TL) MSIs increased at the intervention site during the intervention year. However, the program returned injured employees back to work in a shorter time and, compared with average historical data, reduced compensation costs and healthcare costs associated with TL MSIs during the first year.

Conclusion

The findings that MSI-associated TL and compensation costs were significantly lower during the program illustrates the effectiveness of this program and demonstrates that increased reporting of MSIs need not be associated with increased claims costs.
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