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  • 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
    Sephton MA, Amor K, Franchi IA, Wignall PB, Newton R, Zonneveld JPet al., 2002,

    , GEOLOGY, Vol: 30, Pages: 1119-1122, ISSN: 0091-7613
    • Cite
    • Citations: 76
  • Journal article
    Pearson VK, Sephton MA, Kearsley AT, Bland PA, Franchi IA, Gilmour Iet al., 2002,

    , METEORITICS & PLANETARY SCIENCE, Vol: 37, Pages: 1829-1833, ISSN: 1086-9379
    • Cite
    • Citations: 118
  • Journal article
    Croskell M, Warner M, Morgan J, 2002,

    , GEOPHYSICAL RESEARCH LETTERS, Vol: 29, ISSN: 0094-8276
    • Cite
    • Citations: 12
  • 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
  • Conference paper
    Morgan JV, Christeson GL, Zelt CA, 2002,

    , 9th Biennial Meeting on Tectonophysics, Publisher: ELSEVIER, Pages: 215-226, ISSN: 0040-1951
    • Cite
    • Citations: 33
  • Journal article
    Weyer S, Münker C, Rehkämper M, Mezger Ket al., 2002,

    , CHEMICAL GEOLOGY, Vol: 187, Pages: 295-313, ISSN: 0009-2541
    • Cite
    • Citations: 194
  • Conference paper
    Fehr M, Rehkämper M, Halliday AN, Porcelli Det al., 2002,

    Tellurium isotopes and the origin of the solar system

    , Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: A227-A227, ISSN: 0016-7037
  • 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
  • Journal article
    Woodland SJ, Rehkämper M, Lee DC, Halliday ANet al., 2002,

    High precision MC-ICPMS measurement of Ag isotopic ratios

    , GEOCHIMICA ET COSMOCHIMICA ACTA, Vol: 66, Pages: A847-A847, ISSN: 0016-7037
  • 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
    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
    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
  • Journal article
    Muxworthy AR, Schmidbauer E, Petersen N, 2002,

    , GEOPHYSICAL JOURNAL INTERNATIONAL, Vol: 150, Pages: 558-570, ISSN: 0956-540X
    • Cite
    • Citations: 108
  • 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
  • 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
  • Journal article
    Dai ZR, Bradley JP, Joswiak DJ, Brownlee DE, Hill HGM, Genge MJet al., 2002,

    , NATURE, Vol: 418, Pages: 157-159, ISSN: 0028-0836
    • Cite
    • Citations: 139
  • Journal article
    Jones KA, Warner M, Le Meur D, Pascal G, Tay PLet al., 2002,

    , MARINE GEOLOGY, Vol: 186, Pages: 145-166, ISSN: 0025-3227
    • Cite
    • Citations: 13
  • Journal article
    Tay PL, Lonergan L, Warner M, Jones KAet al., 2002,

    , MARINE GEOLOGY, Vol: 186, Pages: 167-194, ISSN: 0025-3227
    • Cite
    • Citations: 22
  • Conference paper
    Schönbächler M, Lee DC, Halliday AN, Rehkämper M, Hattendorf B, Günther Det al., 2002,

    Nb-Zr systematics and the moon.

    , Publisher: METEORITICAL SOC, Pages: A127-A127, ISSN: 1086-9379

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