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Detecting two components of magnetization in magnetic layer structures by use of a photoelastic modulator (1996)

Jordan, S. M. ; Whiting, J. S. S.

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 67 (1996), S. 4286-4289

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ISSN: 1089-7623

Source: AIP Digital Archive

Topics: Physics , Electrical Engineering, Measurement and Control Technology

Notes: A magneto-optic Kerr effect system for the measurement of magnetization in thin ferromagnetic layers based on a photoelastic modulator is described. The use of a quarter wave plate allows light with a variable polarization incident on the sample to be used. The polarization of the light as it passes through the system is treated algebraically using a matrix approach. A procedure for determining both the magneto-optic (MO) rotation presented by the sample and the traditional ellipsometric parameters is described, the consistency of the solutions being demonstrated by experiment. Typical MO rotation versus thickness curves for thin films of Permalloy (Ni79Fe21) deposited on glass for both the longitudinal and transverse field configurations are presented. These results demonstrate that the magnitude and sign (in the transverse case) of the MO rotation is strongly dependent on thickness for films thinner than 200 A(ring). © 1996 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1147528

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Redefining surgery for gastric cancer (1999)

Whiting, J. L. ; Hallissey, M. T. ; Rowlands, D. C. ; [et al.]

Springer

Gastric cancer 2 (1999), S. 226-229

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ISSN: 1436-3305

Keywords: Key words: gastric neoplasms, surgery, classification

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Background. Despite encouraging retrospective and non-randomized trials, two large prospective, randomized trials of D1 vs D2 resections show double the mortality in the D2 group, with no increase in long-term survival. However, the D2 resection still offers the only hope of cure when N2 nodes are involved. We propose a reclassification of the International Union Against Cancer TNM "N" staging to a system with an anatomical basis that is useful in defining the surgery performed. Junctional nodes lying between the N1 and N2 tiers will act as a guide to surgery. Where these nodes are uninvolved, the probability of gastric bed (N2) involvement is low and the radical D2 dissection with its higher mortality and morbidity can be avoided. Conclusion. Such "stage-appropriate" surgery will reduce the number of D2 resections while ensuring that patients with N2 disease are not denied curative surgery. A prospective, randomized, controlled trial of targeted surgery is required.