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JOHN D.CASHION

John D. Cashion

Honorary Senior Research Fellow

MSc, Univ Melbourne, 1964
DPhil, Univ Oxford, 1966
FAIP
Phone +61 (3) 9905 3680 FAX +61 (3) 9905 3637

Email:John.Cashion@sci.monash.edu.au

RESEARCH INTERESTS

The majority of Associate Professor Cashions research projects have involved some application of Mössbauer spectroscopy, but usually involve other techniques as well. Having a very well equipped Mössbauer laboratory with eleven spectrometers including four liquid helium cryostats, 14 T solenoid, CEMS, furnace and three unique pieces of equipment for multiple spectrum acquisition, many projects are selected because the investigation is an area in which Mössbauer spectroscopy has an advantage over other techniques.

Many of his projects are in the area of mineral processing, particularly in gold extraction onto activated carbon and polyurethane foam, transformation of iron minerals during processing and the study of coal and coal products.

Magnetism is another long-standing interest and current projects involve study of the mechanisms operating in exchange spring magnets made either as films by magnetron sputtering or as powder by ball milling. The magnetic properties of iron compounds also forms an important part of the identification of these materials in the mineral processing projects. These properties can change considerably with particle size and crystallinity which is one of the reasons why Mössbauer spectroscopy is so useful in these studies.

Materials with nanocrystalline dimensions can have considerably different properties to larger particles and a recent interest has been in the study of oxides of 3d transition metals produced by different methods and having nanocrystalline particles or phases.

Associate Professor Cashion has overseen the development of three multiple spectrum Mössbauer data acquisition systems. The first works as an imaging spectrometer and enables the simultaneous acquisition of spectra along a sample to map out the iron phases, valency or coordination. It is principally used for the mineral investigations. The other two can track the time sequence of changes in the chemical or magnetic state of iron atoms which are subject to either a cyclic perturbation or to a continuously retriggered perturbation. The cyclic system is being used to study electrochemically active materials undergoing cyclic voltammetry and is being modified to also take spectra around magnetic hysteresis loops. The retriggered system is being developed to study the effect of rf magnetic fields or laser pulses on appropriate materials.

Book

  1. Murad, E and Cashion, J.D., "Mössbauer Spectroscopy of Environmental Materials and their Industrial Utilization", Kluwer Academic Publishers, 2004, 417pp.

Refereed publications

  1. Cashion, J.D., Brown, L.J., Hannaford, C.S. and Hall, J.S., 'Chemical Changes During Pelletising of Brown Coal Ash', Hyp. Int, 139/140, 417-26 (2002).
  2. McGrath, A.C., Cashion, J.D., Brown, L.J. and Hall, J.S., 'pH Dependence of the Au-CN Species Adsorbed onto Activated Carbon', Hyp. Int, 139/140, 471-7 (2002).
  3. Thong, A.W. and Cashion, J.D., 'The Temperature and Milling Time Dependence of Coercivity in Ball Milled Nd2Fe14B-Gd', Phys. Stat. Sol., 189, 1035-7 (2002).
  4. Junk, P.C., McCool, B.J., Moubaraki, B., Murray, K.S., Spiccia, L., Cashion, J.D. and Steed, J.W., 'Utilization of Crown Ethers to Stabilize the Dinuclear µ-oxo Bridged Iron(III) Aqua Ion, [(H2O)5Fe(µ-O)Fe(OH2)5]4+', J. Chem. Soc., Dalton Trans., 2002, 1024-9.
  5. Ammala, P.S., Batten, S.R., Cashion, J.D., Kepert, C.M., Moubaraki, B., Murray, K.S., Spiccia, L. and West, B.O., 'Synthesis, Molecular Structure and Magnetic Properties of [Fe6(µ3-O)2(OPri)2(µ-OPri)6(O2CPh)2(µ-O2CPh)4]', Inorg. Chim. Acta, 331, 90-7 (2002).
  6. Juraja, S., Vu, T., Richardt, P.J.S., Bond, A.M., Cardwell, T.J., Cashion, J.D., Fallon, G.D., Lazarev, G., Moubaraki, B., Murray, K.S and Wedd, A.G., 'Electrochemical, Spectroscopic, Structural and Magnetic Characterization of the Reduced and Protonated a-Dawson Anions in [Fe(η5-C5Me5)2]5[HS2Mo18O62].3HCONMe2.2Et2O and [NBu4]5[HSMo18O62.2H2O', Inorg. Chem., 41, 1072-1078 (2002).
  7. Halder, G.J., Kepert, C.J., Moubaraki, B., Murray, K.S. and Cashion, J.D., 'Guest-dependent Spin Crossover in a Nanoporous Molecular Framework Material', Science, 298 1762-5 (2002).
  8. Parker, R.J., Lu, K.D., Batten, S.R., Moubaraki, B., Murray, K.S., Spiccia, L., Cashion, J.D., Rae, A.D. and Willis, A.C., 'Synthesis, Crystal Structures and Magnetic Properties of Linear and Bent Trinuclear Complexes Formed by Hexacyanometallates and Copper(II) Complexes', J. Chem, Soc., Dalton Trans., 3723-3730 (2002).
  9. Gross, K.A., Jackson, R., Cashion, J.D. and Rodriguez-Lorenzo, L.M., 'Iron Substituted Apatites: a Resorbable Biomaterial with Potential Magnetic Properties', Cells and Materials, 3 (S2), 114-7 (2002).
  10. Rule, K.C., Cashion, J.D., Mulders, A.M. and Hicks, T.J., 'The Orientation of the Antiferromagnetic Order in FePS3', Hyp. Int., 141/142, 219-22 (2002).
  11. Orlokh, D., Cashion, J.D. and Jahanshahi, S., 'Iron Phases in Fe2O3-CaO-SiO2 Metallurgical Slags', Hyp. Int. (C), 5, 495-8 (2003).
  12. Greaves, T.L., Cashion, J.D., Benci, A.L., Jaggi, N.K., Hogan, C. and Bond, A.M., 'Multiple Mössbauer Spectra Data Acquisition with an In-situ Cyclic Voltammetry System', Hyp. Int. (C), 5, 21-4 (2003).
  13. Cashion, J.D., Chadwick, J., Coyle, C.M. and Finlayson, T.R., 'The Aging Effect in Au-Cd Alloys: a Mössbauer Spectroscopy Study', J. Phys. IV France, 112, 1087-90 (2003).
  14. Greaves, T.L. and Cashion, J.D., 'Application of a Multiple Mössbauer Spectrometer to Electrochemical Processes in a Prussian Blue-Modified Carbon Electrode', Proc. 27th Annual A&NZIP Condensed Matter and Materials Meeting, Wagga Wagga, 2003, www.aip.org.au/wagga_2003/ww03_32.
  15. Mattievich, E., Chadwick, J., Cashion, J.D., Boas, J.F., Clark, M.J. and Mackie, R.D., 'Macroscopic Ferronematic Liquid Crystals Determine the Structure of Kimberley Zebra Rock', Proc. 27th Annual A&NZIP Condensed Matter and Materials Meeting, Wagga Wagga, 2003, www.aip.org.au/wagga_2003/ww03_33.
  16. Davis, J.A., Cashion, J.D., Ponnusamy, R. and Kopcewicz M., 'Collapse of Magnetic Hyperfine Splitting in a Soft Magnet Studied by Multiple Spectrum Mössbauer Data Acquisition', Proc. 27th Annual A&NZIP Condensed Matter and Materials Meeting, Wagga Wagga, 2003, www.aip.org.au/wagga_2003/ww03_34.
  17. Cashion, J.D., '197Au Mössbauer studies - some successes and some future prospects', Mössbauer Effect Ref. Data J., 26, 169-70 (2003).
  18. Brooker, S., Kennepohl, D.K., Lan, Y., Cashion, J.D., Jameson, G.B., Moubaraki, B. and Murray, K.S., 'Processing of the same ligand Using Different Coordination Algorithms Controls the Molecular Architecture of the Resulting Complex: [CuI4(L2)4]4+ Grid Complex Versus [MII2(L2)2X4]y+ Side-by-side Complexes (M=Mn, Co, Ni, Zn; X = Solvent or Anion) and [FeII(L2)3][Cl3FeIIIOFeIIICl3]', Chem. Eur. J., 9, 3772 3784 (2003). (Molecular picture also chosen for front cover of journal, 9/16.)
  19. Spiers, K.M., Cashion, J.D. and Gross, K.A., 'Characterization of Magnetite and Maghemite for Hyperthermia in Cancer Therapy', Key Engg. Mater., 254-256, 213-6 (2004).
  20. Leita, B.A., Moubaraki, B., Murray, K.S., Smith, J.P. and Cashion J.D., 'Structure and Magnetism of a new Pyrazolate Bridged Iron(II) Spin Crossover Complex Displaying a Single HS-HS to LS-LS Transition', Chem. Commun., 156-7 (2004).
  21. Cashion, J.D., 'pH Dependence of the Au-CN Species Adsorbed onto Activated Carbon - Reply to Comments', Hyp. Int., 155, 71-5 (2004).
  22. Van der Werff, P., Batten, S.R., Jensen, P., Moubaraki, B., Murray, K.S. and Cashion, J.D., Structure and Magnetism of 3D Anionic Metal Dicyanimide (MePh3P)[M(dca)3] (M = Fe, Co, Ni) and (EtPh3P)[M(dca)3] (M = Mn, Co, Ni) Networks, Cryst. Growth Design, 4, 503-8 (2004).
  23. Spiers K.M., Cashion, J.D., Gross, K.A. and Harker, S.J., 'Magnetic Materials for Hyperthermic Cancer Treatment', Proc. 28th A&NZ Condensed Matter Physics Meeting, Wagga Wagga 2004, www.aip.org/wagga2004/TP21_Spiers.pdf
  24. Smith, A.E.,Rule, K.C., Cashion J.D. and Hicks, T.J., 'The electric field gradient of FePS3 : a comparison between calculated and measured values', Proc. 28th A&NZ Condensed Matter Physics Meeting, Wagga Wagga 2004, www.aip.org/wagga2004/WP27_AESmith.pdf.
  25. Van der Werff, P., Martinez-Ferrero, E.., Battern, S.R.., Jensen, P., Ruis-Pérez, C., Almeida, M., Waerenborgh, J.C., Cashion, J.D.,. Moubaraki, B., Galán-Mascarós, J.R., Martinez-Agudo, J.M., Coronado, E. and Murray, K.S., 'Hybrid Materials Containing Organometallic Cations and 3-D anionic metal dicyanimide networks of type [Cp*2M][M'(dca)3]', Dalton Trans., 285-90 (2005).
  26. Klingele, M.H., Moubaraki, B., Cashion, J.D., Murray, K.S. and Brooker, S., 'The First X-Ray Crystal Structure Determination of a Dinuclear Complex Trapped in the [Low Spin-High Spin] State: [FeII2(PMAT)2](BF4)4.DMF', Chem. Commun., 987-9 (2005).
  27. Davis, J.A., Cashion, J.D. and Kopcewicz, M., 'Time Dependence of the RF-Induced Magnetic Hfs Collapse Studied by Multiple Spectrum Acquisition', Industrial Applications of the Mössbauer Effect, AIP Conf. Proc. Vol. 765 (Amer. Inst. Phys., New York) 2005, pp149-53.
  28. Coyle, C.M. and Cashion, J.D., 'Mössbauer Effect Study of Seawater-neutralized Red Mud and its Adsorption Properties', Industrial Applications of the Mössbauer Effect, AIP Conf. Proc. Vol. 765 (Amer. Inst. Phys., New York) 2005, pp185-89.
  29. Jones, L.F, Jensen, P., Moubaraki, B., Cashion, J.D., Berry, K.J. and Murray, K.S., The role of diisopropanolamine (dipaH3) in cluster dimerisation and polymerisation: from spin frustrated S = 5 FeIII6 clusters to the novel 1 D covalent polymer of mixed valence [CoII3CoIII] tetramers, Dalton. Trans, 2005, 3344-52.
  30. 1. Ozaki, J., Nozawa, K., Yamada, K., Uchiyama, Y., Yoshimoto, Y., Furuichi, A., Yokoyama, T., Oya, A., Brown, L.J. and Cashion, J.D., Structures, Physicochemical Properties and Oxygen Reduction of Carbons Derived from Ferrocene-Poly(furfuryl alcohol) Mixtures, J. Appl. Electrochem., 36, 239-47 (2006).
  31. Suzuki, K., Ito, N., Garitaonandia, J.S., Cashion, J.D., High saturation magnetization and soft magnetic properties of nanocrystalline (Fe,Co)90Zr7B3 alloys annealed under a rotating magnetic field, J. Appl. Phys., 99 (8): Art. No. 08F114, Apr 15 (2006).
  32. Ito, N., Garitaonandia, J.S., Suzuki, K. and Cashion, J.D., Soft Magnetic Properties of Nanocrystalline Magnetic Crystalline Fe94-xNb6Bx (x = 10, 12 and 14) Alloys Annealled in a Rotating Magnetic Field, J. Magn Magn. Mat, 304, e639-41 (2006).
  33. Garitaonandia, J.S., Suzuki, K., Cashion, J.D., Goikolea, E., Insausti, M., Plazaola, F., Pizarro, R. and Minguez, P., Mössbauer Study of the Crystallization Products of a Fe75Zr25 Amorphous Alloy, Hyp. Int., 10.1007/s10751 006 9260 2.
  34. Cashion, J.D. and Greaves, T.L., In-situ Mössbauer Studies of Electrochemical Processes, Hyp. Int., DOI 10.1007/s10751-006-9241-5.
  35. McGrath, A.C. and Cashion, J.D., Gol=danskii-Karyagin Effect and Induced Fields in Rare Earth-Transition Metal Stannides, Hyp, Int. DOI 10.1007/s10751-006-9409-z.
  36. Suzuki, K., Ito, N., Garitaonandia, J.S. and Cashion, J.D., High Saturation Magnetization and Soft Magnetic Properties of Nanocrystalline (Fe,Co)90Zr7B3 Alloy Annealled under a Rotating Magnetic Field, J. Appl. Phys. 99 08F114-1 to 3, (2006).
  37. Ito, N., Michels, A., Kohlbrecher, J., Garitaonandia, J.S., Suzuki, K. and Cashion, J.D., Effect of Magnetic Field Annealing on the Soft Magnetic Properties of Nanocrystalline Materials, J. Magn. Magn. Mater., Proc JEMS06, J. Magn. Magn. Materials, accepted 12 July 06.
  38. Spiers, K.M., Forsythe, J.S., Suzuki, K. and Cashion, J.D., Production of Magnetic Microspheres by Ultrasonic Atomisation, J. Magn. Magn. Materials, doi:10.1016/j.jmmm.2006.10.119.
  39. Perera, D.S., Cashion, J.D., Blackford, M.G., Zhang, Z. and Vance, E.R., Fe Speciation in Geopolymers with Si/Al Ratio ~2, accepted Eur. Ceram. Soc. J., 1/9/06, in press.
  40. Amoore, J.J.M., Kepert, C.J., Cashion, J.D., Moubaraki, B., Neville, S.M. and Murray, K.S., Structural and Magnetic Resolution of a Two-step Full Spin-crossover Transition in a Dinuclear Iron(II) Pyridyl-bridged Compound, Chem. Eur J., 12, 8220-7 (2006). (Structure diagram used for front cover).
  41. 12. Cadogan, J.M., Ryan, D.H. and Cashion, J.D., 155Gd Study of GdFe6Ge6, J. Phys. Condens. Matter, accepted 24/1/07.
  42. Schneider, C.J., Cashion, J.D., Moubaraki, B., Neville, S.M. and Murray, K.S., The Magnetic and Structural Elucidation of 3,5-Bis(2-pyridyl)-1,2,4-triazolate-Bridged Dinuclear Iron(II) Spin Crossover Compounds, Polyhedron, in press.