David P. Belanger

Distinguished Professor of Physics
Acting Dean, Physical and Biological Sciences
Ph.D., University of California, Santa Barbara, 1981

Office : NSII Annex, room 204
Address : Physics Department, University of California, Santa Cruz, CA 95064
e-mail : dave@dave.ucsc.edu



Research Interests

We are interested in the ordering process in materials, both pure and random. Recent work has focused on magnetism and phase transitions in LaCoO3 single crystals, bulk particles and nanoparticles and related systems. Techniques include neutron scattering, x-ray scattering, and magnetometry.


Current Committee Memberships

ORNL Science Review


Publications

  1. Origin of the net magnetic moment in LaCoO3
    G. M. Kaminsky, D. P. Belanger, F. Ye, J. A. Fernandez-Baca, J. Wang, M. Matsuda, and J.-Q. Yan, Phys. Rev. B 97, 024418 (2018).

  2. Structure and magnetism in LaCoO3
    D. P. Belanger, T. Keiber, F. Bridges, A. M. Durand, A. Mehta, H. Zheng, J. F. Mitchell, and V. Borzenets, J. Phys.: Condens. Matter 28, 025602 (2016).

  3. The unusual magnetism of nanoparticle LaCoO3
    A. M. Durand, D. P. Belanger, T. J. Hamil, F. Ye, S. Chi, J. A. Fernandez-Baca, C. H. Booth, Y. Abdollahian, and M. Bhat, J. Phys.: Condens. Matter 27, 176003 (2015).

  4. The effects of Co3O4 on the structure and unusual magnetism of LaCoO3
    A. M. Durand, T. J. Hamil, D. P. Belanger, S. Chi, F. Ye, J. A. Fernandez-Baca, Y. Abdollahian, and C. H. Booth, J. Phys.: Condens. Matter 27, 126001 (2015).

  5. Magnetism and phase transitions in LaCoO3
    A. M. Durand, D. P. Belanger, C. H. Booth, F. Ye, S. Chi, J. A. Fernandez-Baca, and M. Bhat, J. Phys.: Condens. Matter 25, 382203 (2013).

  6. Neutron scattering experiments and simulations near the magnetic percolation threshold of Fe(x)Zn(1-x)F2
    G. Alverez, N. Aso, D. P. Belanger, A. M. Durand, V. Martin-Mayor, K. Motoya, and Y. Muro, Phys. Rev. B, 86, 024416, (2012).

  7. Study of the local distortions of the perovskite system La(1-x)Sr(x)CoO3 (0<x< 0.35) using the extended x-ray absorption fine structure technique
    Y. Jiang, F. Bridges, N. Sundaram, D.P. Belanger, I.E. Anderson, J.F. Mitchell, and H. Zheng, Phys. Rev. B, 80, 144423, (2009).

  8. Local structure of La(1-x)Sr(x)CoO3 determined from EXAFS and neutron PDF studies
    N. Sundaram, Y. Jiang, I.E. Anderson, D.P. Belanger, C.H. Booth, F. Bridges, J.F. Mitchell, Th. Proffen, and H. Zheng,
    Phys. Rev. Lett. 102, 026401 (2009).

  9. The order parameter critical exponent of the chiral phase transition in VF2
    F. Ye, Y.W. Rodriguez, D.P. Belanger, and J.A. Fernandez-Baca,
    Journ. Magn. Magn. Mater. 310, 1410-1412 (2007).

  10. Low-temperature excitations in a dilute three-dimensional anisotropic an tiferromagnet
    Y.W. Rodriguez, I.E. Anderson, D.P. Belanger, H. Nojiri, F. Ye, and J.A. Fernandez-Baca,
    Journ. Magn. Magn. Mater. 310, 1546-1548 (2007).

  11. Quasistationary criticality of the order parameter of the three-dimensional random-field Ising antiferromagnet Fe(0.85)Zn(0.15)F2: a synchrotron x-ray scattering study
    F. Ye, S. A. Meyer, L. J. Shelton, D. P. Belanger, L. Lu, S. Larochelle, and M. Greven,
    Phys. Rev. B 74, 144431-144440 (2006).

  12. Simulations of irreversibilities of the random-field Ising model order parameter
    L. J. Shelton, F. Ye, W. C. Barber, L. Zhou, and D. P. Belanger,
    J. Magn. & Magn. Mater., 272-276, 1302-03 (2004).

  13. Percolation fractal dimension in scattering line shapes of the random-field Ising model
    F. Ye, M. Matsuda, S. Katano, H. Yoshizawa, D. P. Belanger, E. T. Seppala, J. A. Fernandez-Baca, and M. J. Alava,
    J. Magn. & Magn. Mater., 272-276, 1298-1299 (2004).

  14. Magnetic vacancy percolation in dilute antiferromagnets
    W. C. Barber, F. Ye, D. P. Belanger, and J. A. Fernandez-Baca,
    Phys. Rev. B 69, 24409-24413 (2004).

  15. The spallation neutron source is taking shape
    T. E. Mason, R. K. Crawford, G. J. Bunick, A. E. Ekkebus, and D. P. Belanger,
    Appl. Phys. A 74, S11-S14 (2002).

  16. Order parameter criticality of the d=3 random-field Ising antiferromagnet Fe(0.85)Zn(0.15)F2
    F. Ye, L. Zhou, S. Larochelle, L. Lu, D. P. Belanger, M. Greven, and D. Lederman,
    Phys. Rev. Letters 89, 157202-157205 (2002).

  17. Magnetic excitations in the three-dimensional dilute antiferromagnet Fe(x)Zn(1-x)F2
    J. Satooka, K. Katsumata, and D. P. Belanger,
    J. Phys: Condens. Matter 14, 1307-1318 (2002).

  18. Large random-field behavior above the vacancy percolation concentration threshold: Fe(0.84)Zn(0.16)F2
    T. Sakon, S. Awaji, M. Motokawa, and D. P. Belanger,
    J. Phys. Soc. Japan 71, 411-415 (2002).

  19. Scaling properties of the critical behavior in the dilute antiferromagnet Fe(0.93)Zn(0.07)F2
    Z. Slanic, D. P. Belanger, and J. A. Fernandez-Baca,
    J. Phys.: Condensed Matter 13, 1711-1726 (2001).

  20. Far infrared spectroscopy on the three-dimensional dilute antiferromagnet Fe(x)Zn(1-x)F2
    J. Satooka, K. Katsumata, and D. P. Belanger,
    J. Appl. Phys. 89, 7047-7049 (2001).

  21. Monte carlo simulations of the random-field Ising model
    W. C. Barber and D. P. Belanger,
    J. Magn. Magn. Mater. 226-230, 545547 (2001).

  22. Experimental characterization of the Ising model in disordered antiferromagnets (Invited)
    D. P. Belanger,
    Brazilian J. of Physics 30, 682-700 (2000).

  23. The random field critical concentration in dilute antiferromagnets
    W. C. Barber and D.P. Belanger,
    J. Appl. Phys. 87, 7049-7051 (2000).

  24. d=3 random field behavior near percolation
    F. C. Montenegro, D. P. Belanger, Z. Slanic, and J. A. Fernandez-Baca,
    J. Appl. Phys. 87, 6537-6539 (2000).

  25. Ordering in the dilute weakly anisotropic antiferromagnet Mn(0.35)Zn(0.65)F2
    F. C. Montenegro, D. P. Belanger, Z. Slanic, and J.A. Fernandez-Baca,
    Phys. Rev. B 61, 14681-14685 (2000).

  26. Specific heat and optical birefringence of Fe(0.25)Zn(0.75)F2
    W. C. Barber and D. P. Belanger,
    Phys. Rev. B 61, 8960-8965 (2000).

  27. Equilibrium random-field Ising critical scattering in the antiferromagnet Fe(0.93)Zn(0.07)F2
    Z. Slanic, D. P. Belanger, and J. A. Fernandez-Baca,
    Phys. Rev. Letters 82, 426-429 (1999).

  28. Crossover from pure Ising to random-exchange dominated behavior of the two-dimensional antiferromagnet Rb2Co(0.85)Mg(0.15)F4
    Ch. Binek, W. Kleemann, and D. P. Belanger,
    Phys. Rev. B 57, 7791-7797 (1998).

  29. Random-field critical scattering at high magnetic concentration in the Ising antiferromagnet Fe(0.93)Zn(0.07)F2
    Z. Slanic, D. P. Belanger, and J. A. Fernandez-Baca,
    J. Magn. Magn. Mater. 177-181, 171-172 (1998).

  30. The random-field specific heat critical behavior at high magnetic concentration: Fe(0.93)Zn(0.07)F2
    Z. Slanic and D. P. Belanger,
    J. Magn. Magn. Mater. 186, 65-73 (1998).

  31. Kinetics of random-field induced domains in the two-dimensional Ising antiferromagnet Rb2Co(0.85)Mg(0.15)F4
    W. Kleemann, Ch. Jakobs, Ch. Binek, and D. P. Belanger,
    J. Magn. Magn. Mater. 177-81, 209-210 (1998).

  32. Experiments on the Random Field Ising Model (Invited)
    D. P. Belanger,
    ``Spin Glasses and Random Fields'', ed. A.P. Young World Scientific, 1998.

  33. Dynamics of the antiferromagnetic random exchange Ising system Fe(x)Zn(1-x)F2 near the percolation threshold
    K. Jonason, C. Djurberg, P. Nordblad, and D. P. Belanger,
    Phys. Rev. B 56, 5404-5411 (1997).

  34. Thermodynamic study of the magnetic phase transition in UNi4B
    S. A. M. Mentink, H. Amitsuka, A. de Visser, Z. Slanic, D. P. Belanger, J. J. Neumeier, J. D. Thompson, A. A. Menovsky, J. A. Mydosh, and T. E. Mason,
    Physica B 230, 108-110 (1997).

  35. Comment on ``X-Ray and neutron scattering, magnetization and heat capacity study of the 3D random field Ising model''
    D. P. Belanger, W. Kleemann, and F. C. Montenegro,
    Phys. Rev. Lett. 77, 2341-2343 (1996).

  36. Effect of spin-system fluctuations on heat transport in RbMnF3 close to the Neel temperature
    M. Marinelli, F. Mercuri, S. Foglietta, and D. P. Belanger,
    Phys. Rev. B 54, 4087-4092 (1996).

  37. Specific heat of the structural random-field Ising system DyAs(x)V(1-x)O4
    Z. Slanic, D. P. Belanger, J. Wang, and D. R. Taylor,
    Phys. Rev. B 53, 97-101 (1996).

  38. Magnetic order in the random-field Ising film Fe(0.5)Zn(0.5)F2
    D. P. Belanger, J. Wang, Z. Slanic, S.-J. Han, R. M. Nicklow, M. Lui, C. A. Ramos, and D. Lederman,
    Phys. Rev. B 54, 3420-3427 (1996).

  39. Specific heat, thermal diffusivity, and thermal conductivity of FeF2 at the Neel temperature
    M. Marinelli, F. Mercuri, and D. P. Belanger,
    Phys. Rev. B 51, 8897-8903 (1995).

  40. Critical behavior of thermal parameters of FeF2 at the Neel temperature
    M. Marinelli, F. Mercuri, and D.P. Belanger,
    J. Magn. Magn. Mater. 140-144, 1547-1548 (1995).

  41. Neutron scattering study of the random-field Ising film Fe(0.5)Zn(0.5)F2
    D. P. Belanger, J. Wang, Z. Slanic, S-J. Han, R. M. Nicklow, M. Lui, C. A. Ramos, and D. Lederman,
    J. Magn. Magn. Mater. 140-144, 1549-1550 (1995).

  42. Specific heat critical behavior of an Ising stacked triangular lattice antiferromagnet CsCoBr3
    J. Wang, D. P. Belanger, and B. D. Gaulin ,
    Phys. Rev. B 49, 12299-12302 (1994).

  43. Magnetic excitations in the dilute anisotropic antiferromagnet Fe(x)Zn(1-x)F2
    C. Paduani, D. P. Belanger, J. Wang, S-J. Han, and R. M. Nicklow,
    Phys. Rev. B 50, 193-199 (1994).

  44. Neutron and x-ray scattering studies of (FeF2)m(CoF2)n multilayers
    D. Lederman, D. P. Belanger, J. Wang, S-J. Han, C. A. Ramos, C. Paduani, and R. M. Nicklow,
    Magnetic Ultrathin Films. Multilayers and Surfaces, Interfaces and Characterization Symposium. (Magnetic Ultrathin Films. Multilayers and Surfaces, Interfaces and Characterization Symposium, San Francisco, CA, USA, 12-16 April 1993). Edited by: Jonker, B.T.; Chambers, S.A.; Farrow, R.F.C.; Chappert, C.; and others. Philadelphia, PA, USA: Mater. Res. Soc, 1993. p. 333-8.

  45. Neutron scattering measurements of the staggered magnetization of an antiferromagnetic epitaxial thin film FeF2
    D. P. Belanger, M. Lui, and R. W. Erwin,
    Magnetic Ultrathin Films. Multilayers and Surfaces, Interfaces and Characterization Symposium. (Magnetic Ultrathin Films. Multilayers and Multilayers and Surfaces, Interfaces and Characterization Symposium, San Francisco, CA, USA, 12-16 April 1993). Edited by: Jonker, B.T.; Chambers, S.A.; Farrow, R.F.C.; Chappert, C.; and others. Philadelphia, PA, USA: Mater. Res. Soc, 1993. p. 755-9.

  46. Neutron scattering measurements in Fe(x)Zn(1-x)F2 near the percolation threshold
    D. P. Belanger and H. Yoshizawa,
    Phys. Rev. B 47, 5051-5058 (1993).

  47. Recent experiments in Ising antiferromagnets with quenched randomness (Invited)
    D. P. Belanger,
    Brazilian Journ. Phys. 22, 283-294 (1992).

  48. Relaxation of the remanent magnetization of dilute anisotropic antiferromagnets
    S.-J. Han and D. P. Belanger