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  • Journal article
    Wombacher F, Rehkämper M, 2003,

    Investigation of the mass discrimination of multiple collector ICP-MS using neodymium isotopes and the generalised power law

    , JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, Vol: 18, Pages: 1371-1375, ISSN: 0267-9477
  • Conference paper
    Lee H, Morgan JV, Warner MR, 2003,

    Radargrammetry of opposite-side stereo magellan synthetic aperture radar on Venus

    , 23rd International Geoscience and Remote Sensing Symposium (IGARSS 2003), Publisher: IEEE, Pages: 182-184
  • Journal article
    Watson JS, Pearson VK, Gilmour I, Sephton MAet al., 2003,

    Contamination by sesquiterpenoid derivatives in the Orgueil carbonaceous chondrite

    , ORGANIC GEOCHEMISTRY, Vol: 34, Pages: 37-47, ISSN: 0146-6380
  • Conference paper
    Muxworthy AR, Williams W, 2003,

    The Role of Magnetostatic Interactions on the Anisotropy of Magnetic Remanence: Micromagnetic Modeling of Distribution Anisotropy (invited)

    , AGU Fall
  • Conference paper
    Carvallo C, Dunlop DJ, Ozdemir O, Muxworthy ARet al., 2003,

    Testing some predicted properties of FORC diagrams: Micromagnetic modeling and measurements (invited)

    , 1st International Workshop on Magnetism, Hysteresis and the FORC method
  • Conference paper
    Muxworthy AR, King JG, Heslop D, Williams Wet al., 2003,

    Unravelling Magnetic Mixtures Using First-Order-Reversal-Curve (FORC) Diagrams: Linear Additivity and Interactions (poster)

    , AGU Fall
  • Journal article
    Wignall PB, Zonneveld JP, Sephton MA, 2003,

    Carbon and nitrogen isotope disturbances and an end-Norian (Late Triassic) extinction event : comment and reply

    , GEOLOGY, Vol: 7, Pages: e25-e25, ISSN: 0091-7613
  • Journal article
    Sephton MA, Amor K, Franchi IA, Wignall PB, Newton R, Zonneveld JPet al., 2002,

    Carbon and nitrogen isotope disturbances and an end-Norian (Late Triassic) extinction event

    , GEOLOGY, Vol: 30, Pages: 1119-1122, ISSN: 0091-7613
  • Conference paper
    Muxworthy A R, Carvallo C, Dunlop D J, 2002,

    Micromagnetic modeling of First-Order Reversal Curves (FORC) diagrams for single-domain pseudo-single-domain magnetite (poster)

    , AGU Fall
  • Journal article
    Pearson VK, Sephton MA, Kearsley AT, Bland PA, Franchi IA, Gilmour Iet al., 2002,

    Clay mineral-organic matter relationships in the early solar system

    , METEORITICS & PLANETARY SCIENCE, Vol: 37, Pages: 1829-1833, ISSN: 1086-9379
  • Journal article
    Muxworthy AR, Dunlop DJ, 2002,

    First-order reversal curve (FORC) diagrams for pseudo-single-domain magnetites at high temperature

    , EARTH PLANET SC LETT, Vol: 203, Pages: 369-382, ISSN: 0012-821X

    The recently developed first-order reversal curve (FORC) technique for rapidly examining magnetic domain state has great potential for paleomagnetic and environmental magnetic investigations. However, there are still some gaps in the basic understanding of FORC diagrams, in particular the behavior of pseudo-single-domain (PSD) grains and the contribution of magnetostatic interactions. In this paper we address some of these problems. We report the first FORC diagrams measurements on narrowly sized and well-characterized synthetic PSD through multidomain (MD) magnetite samples. The FORC diagrams evolve with grain size from single-domain (SD)-like to MD-like through the PSD grain size range. Since each sample contains grains of essentially a single size, individual PSD grains evidently contain contributions from both SD-like and MD-like magnetic moments, in proportions that vary with grain size; the evolving FORC diagrams cannot be due to physical mixtures of SD and MD grains of widely different sizes. The FORC diagrams were all asymmetric. Small PSD samples have FORC diagrams with a distinctive closed-contour structure. The distributions of the larger MD grains display no peak, and lie closer to the interaction-field axis. To assess the effect of magnetostatic interactions, we measured FORC diagrams between room temperature and the Curie temperature. On heating the FORC distributions contract without changing shape until similar to500degreesC. Above this temperature the diagrams become more MD-like, and in addition become more symmetric. The temperature dependence of the interaction-field parameter is proportional to that of the saturation magnetization, in accordance with Neel's interpretation of the Preisach diagram. The decrease in asymmetry with heating suggests that the origin of the asymmetry lies in magnetostatic interactions. The magnetic hysteresis parameters as a function of temperature were determined from the FORC curves. As the grain size decreased the no

  • Journal article
    Croskell M, Warner M, Morgan J, 2002,

    Annealing of shocked quartz during atmospheric re-entry

    , GEOPHYSICAL RESEARCH LETTERS, Vol: 29, ISSN: 0094-8276
  • Journal article
    Weyer S, Münker C, Rehkämper M, Mezger Ket al., 2002,

    Determination of ultra-low Nb, Ta. Zr and Hf concentrations and the chondritic Zr/Hf and Nb/Ta ratios by isotope dilution analyses with multiple collector ICP-MS

    , CHEMICAL GEOLOGY, Vol: 187, Pages: 295-313, ISSN: 0009-2541
  • Conference paper
    Halliday AN, Lee DC, Fehr M, Quitté G, Porcelli D, Rehkämper M, Stirling C, Schönbächler M, Woodland Set al., 2002,

    Accretion and accredited anomalies

    , Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: A304-A304, ISSN: 0016-7037
  • Conference paper
    Williams H, Lee DC, Levasseur S, Teutsch N, Poitrasson F, Rehkämper M, Halliday ANet al., 2002,

    Iron isotope composition of mid-ocean ridge basalts and mantle peridotites

    , Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: A838-A838, ISSN: 0016-7037
  • Journal article
    Muxworthy AR, Schmidbauer E, Petersen N, 2002,

    Magnetic properties and Mossbauer spectra of urban atmospheric particulate matter: a case study from Munich, Germany

    , GEOPHYSICAL JOURNAL INTERNATIONAL, Vol: 150, Pages: 558-570, ISSN: 0956-540X
  • Conference paper
    Wombacher F, Rehkämper M, Mezger K, Münker C, Bischoff Aet al., 2002,

    Stable isotope compositions of Cadmium in stony meteorites

    , Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: A844-A844, ISSN: 0016-7037
  • Conference paper
    Schönbächler M, Lee DC, Halliday A, Rehkämper M, Hattendorf B, Günther Det al., 2002,

    <SUP>92</SUP>Nb-<SUP>92</SUP>Zr chronometry and early lunar evolution

    , Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: A686-A686, ISSN: 0016-7037
  • Conference paper
    Nielsen SG, Rehkämper M, Porcelli D, Swarzenski P, Halliday Aet al., 2002,

    Isotopic compositions and concentrations of estuarine thallium

    , Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: A554-A554, ISSN: 0016-7037
  • Conference paper
    Rehkämper M, Frank M, Hein JR, Nielsen S, Halliday ANet al., 2002,

    Secular variation of Tl isotopes in ferromanganese crusts?

    , Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: A629-A629, ISSN: 0016-7037

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