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296 results on '"Beale T"'

51. Resonant Soft X-ray Scattering Investigation of Orbital and Magnetic Ordering in $\\rm La_{0.5}Sr_{1.5}MnO_4$

Author

Wilkins, S. B., Stojic, N., Beale, T. W. A., Binggeli, N., Castleton, C. W. M., Bencok, P., Prabhakaran, D., Boothroyd, A. T., Hatton, P., Altarelli, M., and European Synchrotron Radiation Facility (ESRF)

Subjects
Condensed Matter - Strongly Correlated Electrons, Strongly Correlated Electrons (cond-mat.str-el), [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other], FOS: Physical sciences
Abstract

We report resonant x-ray scattering data of the orbital and magnetic ordering at low temperatures at the Mn $L_{\rm 2,3}$ edges in \lsmo. The orderings display complex energy features close to the Mn absorption edges. Systematic modeling with atomic multiplet crystal field calculations was used to extract meaningful information regarding the interplay of spin, orbital and Jahn-Teller order. These calculations provide a good general agreement with the observed energy dependence of the scattered intensity {for a} dominant orbital ordering of the $ d_{x^2 - z^2} / d_{y^2 - z^2} $ type. In addition, the origins of various spectral features are identified. The temperature dependence of the orbital and magnetic ordering was measured and displays a strong interplay between the magnetic and orbital order parameters., 6 Figures, Submitted to Physical Review B

Published
2005

52. Radiology Quiz Case 1

Author

Persaud R, Elmiyeh B, Prasad, Lucas D, Beale T, and Whitaker Is

Subjects
medicine.medical_specialty, Otorhinolaryngology, business.industry, Association (object-oriented programming), medicine, Surgery, Charge (physics), General Medicine, Radiology, business
Published
2005

54. Controlling Magnetic Order and Quantum Disorder in Molecule-Based Magnets

Author

Lancaster, T., primary, Goddard, P. A., additional, Blundell, S. J., additional, Foronda, F. R., additional, Ghannadzadeh, S., additional, Möller, J. S., additional, Baker, P. J., additional, Pratt, F. L., additional, Baines, C., additional, Huang, L., additional, Wosnitza, J., additional, McDonald, R. D., additional, Modic, K. A., additional, Singleton, J., additional, Topping, C. V., additional, Beale, T. A. W., additional, Xiao, F., additional, Schlueter, J. A., additional, Barton, A. M., additional, Cabrera, R. D., additional, Carreiro, K. E., additional, Tran, H. E., additional, and Manson, J. L., additional

Published
2014
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61. Resonant soft x-ray scattering investigation of orbital and magnetic ordering in La0.5Sr1.5MnO4

Author

Wilkins, S. B., Stojic, N., Beale, T. A. W., Binggeli, N., Castleton, Christopher, Bencok, P., Prabhakaran, D., Boothroyd, A. T., Hatton, P. D., Altarelli, M., Wilkins, S. B., Stojic, N., Beale, T. A. W., Binggeli, N., Castleton, Christopher, Bencok, P., Prabhakaran, D., Boothroyd, A. T., Hatton, P. D., and Altarelli, M.

Abstract

We report resonant x-ray scattering data of the orbital and magnetic ordering at low temperatures at the Mn L-2,L-3 edges in La0.5Sr1.5MnO4. The orderings display complex energy features close to the Mn absorption edges. Systematic modeling with atomic multiplet crystal field calculations was used to extract meaningful information regarding the interplay of spin, orbital, and Jahn-Teller order. These calculations provide a good general agreement with the observed energy dependence of the scattered intensity for a dominant orbital ordering of the d(x)(2)-z(2)/d(y)(2)-z(2) type. In addition, the origins of various spectral features are identified. The temperature dependence of the orbital and magnetic ordering was measured and suggests a strong interplay between the magnetic and orbital order parameters.

Published
2005
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100. Long-term follow-up of hearing loss in children and young adults with enlarged vestibular aqueducts: relationship to radiologic findings and Pendred syndrome diagnosis.

Author

Colvin IB, Beale T, Harrop-Griffiths K, Colvin, Ian B, Beale, Timothy, and Harrop-Griffiths, Katherine

Abstract

Objective: To describe the long-term audiologic findings in pediatric patients with enlarged vestibular aqueducts (EVAs). The relationship between the hearing loss (HL) and the dimensions of the EVA, enlarged endolymphatic duct (EED), or enlarged endolymphatic sac (EES) was also investigated. The influence of a Pendred syndrome (PS) diagnosis on the audiologic phenotype was also examined. Study Design: Retrospective analysis of case notes and imaging records, including measurement of the dimensions of the EVA, EED, and EES. Setting: Tertiary referral center. Patients: Twenty-seven patients (21 female, 6 male) had an EVA in at least one ear. Eighty-five percent had bilateral enlargements. Median age at onset of follow-up was 5.0 years, and median follow-up was 9.7 years. Main Outcome Measures: Hearing thresholds at the start and end of follow-up, rate of progression of HL, history of sudden drops in hearing. Results: : All ears with an EVA had HL. Average HL at the start and end of follow-up was severe. Thirty-seven percent of patients had progressive HL, and 33% reported sudden drops in hearing. Progression was significantly associated with a history of sudden drops. PS patients had worse hearing at the end of follow-up as compared with nonsyndromic patients. There was no evidence of a relationship between the dimensions of the EVA, EED, or EES and the severity or progression of HL. Conclusions: Patients with EVAs should be advised to avoid known trigger factors for sudden drops in hearing (e.g., minor head trauma). A diagnosis of PS may be associated with a worse audiologic prognosis. [ABSTRACT FROM AUTHOR]

Published
2006

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