Observation of a continuous phase transition in a shape-memory alloy (2008)
Lashley, J. C., Shapiro, S. M., Winn, B. L., Opeil, C. P., Manley, M. E., Alatas, A., ...
Elastic neutron-scattering, inelastic x-ray scattering, specific-heat, and pressure-dependent electrical transport measurements have been made on single crystals of AuZn and Au_{0.52}Zn_{0.48} above...
Opeil, C. P., Mihaila, B., Schulze, R. K., Manosa, L., Planes, A., Hults, W. L., ...
Ultraviolet-photoemission (UPS) measurements and supporting specific-heat, thermal-expansion, resistivity and magnetic-moment measurements are reported for the magnetic shape-memory alloy Ni$_2$MnGa...
Stishov, S. M., Petrova, A. E., Khasanov, S., Panova, G. Kh., Shikov, A. A., Lashley, J. C., ...
New high resolution data for heat capacity, heat capacity under applied magnetic fields and resistivity of high quality single crystal of MnSi are reported. Striking mirror symmetry between...
On the nature of the phase transition in the itinerant helimagnet MnSi (2007)
Stishov, S. M., Petrova, A. E., Khasanov, S., Panova, G. Kh., Shikov, A. A., Lashley, J. C., ...
A careful study of thermodynamic and transport properties of a high quality single crystal of MnSi at ambient pressure suggests that its transition to a helical magnetic state near 29 K is weakly...
Lashley, J. C., Opeil, C. P., Finlayson, T. R., Fisher, R. A., Hur, N., Hundley, M. F., ...
Specific-heat measurements are reported near the Curie temperature ($T_C$~= 320 K) on tri-glycine sulfate. Measurements were made on crystals whose surfaces were either non-grounded or...
Opeil, C. P., Schulze, R. K., Volz, H. M., Lashley, J. C., Manley, M. E., Hults, W. L., ...
Continuing the photoemission study begun with the work of Opeil et al. [Phys. Rev. B \textbf{73}, 165109 (2006)], in this paper we report results of an angle-resolved photoemission spectroscopy...
Ytterbium divalency and lattice disorder in near-zero thermal expansion YbGaGe (2006)
Booth, C. H., Christianson, A. D., Lawrence, J. M., Pham, L. D., Lashley, J. C., Drymiotis, F. R.
While near-zero thermal expansion (NZTE) in YbGaGe is sensitive to stoichiometry and defect concentration, the NZTE mechanism remains elusive. We present x-ray absorption spectra that show...
A versatile and compact capacitive dilatometer (2006)
Schmiedeshoff, G. M., Lounsbury, A. W., Luna, D. J., Tracy, S. J., Schramm, A. J., Tozer, S. W., ...
We describe the design, construction, calibration, and operation of a relatively simple differential capacitive dilatometer suitable for measurements of thermal expansion and magnetostriction from...
Dirty Peierls transition to stripe phase in manganites (2006)
Cox, S., Lashley, J. C., Rosten, E., Singleton, J., Williams, A. J., Littlewood, P. B.
The nature of the phase transitions in La$_{1-x}$Ca$_x$MnO$_3$ and Pr$_{0.48}$Ca$_{0.52}$MnO$_3$ has been probed using heat capacity and magnetisation measurements. The phase transition associated...
So, W., Lang, D. V., Butko, V. Y., Chi, X., Lashley, J. C., Ramirez, A. P.
We develop a broadly applicable transport-based technique, GAte Modulated activation Energy Spectroscopy (GAMEaS), for determining the density of states (DOS) in the energy gap. GAMEaS is applied to...
Tricritical Phenomena at the Cerium $\gamma \to \alpha$ Transition (2006)
Lashley, J. C., Lawson, A. C., Cooley, J. C., Mihaila, B., Opeil, C. P., Pham, L., ...
The $\gamma \to \alpha$ isostructural transition in the Ce$_{0.9-x}$La$_x$Th$_{0.1}$ system is measured as a function of La alloying using specific heat, magnetic susceptibility, resistivity, thermal...
Electronic Instabilities in Shape-Memory Alloys (2006)
Lashley, J. C., Schulze, R. K., Mihaila, B., Hults, W. L., Smith, J. L., Risenborogh, P. S., ...
Using a variety of thermodynamic measurements made in magnetic fields, we show evidence that the diffusionless transition (DT) in many shape-memory alloys is related to significant changes in the...
Opeil, C. P., Schulze, R. K., Manley, M. E., Lashley, J. C., Hults, W. L., Hanrahan, R. J., ...
Valence-band ultraviolet photoemission spectroscopy (UPS) at 173K and 6p core-level X-ray photoemission spectroscopy (XPS) at room temperature were performed on a high quality uranium single crystal....
Pinning frequencies of the collective modes in $\alpha$-uranium (2006)
Mihaila, B., Opeil, C. P., Drymiotis, F. R., Smith, J. L., Cooley, J. C., Manley, M. E., ...
Uranium is the only known element that features a charge-density wave (CDW) and superconductivity. We report a comparison of the specific heat of single-crystal and polycrystalline $\alpha$-uranium....
Kimura, T., Lashley, J. C., Ramirez, A. P.
Magnetoelectric and magnetoelastic phenomena correlated with a phase transition into noncollinear magnetic phase have been investigated for single crystals of CuFeO2 with a frustrated triangular...
Strong electron-phonon coupling in delta-phase stabilized Pu (2005)
Graf, M. J., Lookman, T., Wills, J. M., Wallace, D. C., Lashley, J. C.
Heat capacity measurements of the delta-phase stabilized alloy Pu-Al suggest that strong electron-phonon coupling is required to explain the moderate renormalization of the electronic density of...
Catastrophic Fermi surface reconstruction in the shape-memory alloy AuZn (2005)
Goddard, P. A, Singleton, J., McDonald, R. D., Harrison, N., Lashley, J. C., Harima, H., ...
AuZn undergoes a shape-memory transition at 67 K. The de Haas van Alphen effect persists to 100 K enabling the observation of a change in the quantum oscillation spectrum indicative of a catastrophic...
Fermi Surface as a Driver for the Shape-Memory Effect in AuZn (2005)
McDonald, R. D., Lashley, J. C., Singleton, J., Goddard, P. A., Drymiotis, F., Harrison, N., ...
Martensites are materials that undergo diffusionless, solid-state transitions. The martensitic transition yields properties that depend on the history of the material and may allow it to recover its...
Absence of magnetic moments in plutonium (2004)
Lashley, J. C., Lawson, A. C., McQueeney, R. J., Lander, G. H.
Many theories published in the last decade propose that either ordered or disordered local moments are present in elemental plutonium at low temperatures. We present new experimental data and review...
Tunable Thermal Expansion Behavior in the Intermetallic YbGaGe (2004)
Drymiotis, F. R., Lee, Y., Lawes, G., Lashley, J. C., Kimura, T., Shapiro, S. M., ...
We investigate the effects of carbon and boron doping on the thermal expansion in the hexagonal (P63/mmc) intermetallic YbGaGe. X-ray powder diffraction was used to measure the lattice constants on...
Drymiotis, F., Singleton, J., Harrison, N., Balicas, L., Bangura, A., Mielke, C. H., ...
The $\gamma-\alpha$ transition in Ce$_{0.8}$La$_{0.1}$Th$_{0.1}$ is measured as a function of applied magnetic field using both resistivity and magnetization. The $\gamma - \alpha$ transition...
Low temperature field-effect in crystalline organic material (2004)
Butko, V. Y., Lashley, J. C., Ramirez, A. P.
Molecular organic materials offer the promise of novel electronic devices but also present challenges for understanding charge transport in narrow band systems. Low temperature studies elucidate...
Unusual phonon softening in delta-phase plutonium (2004)
McQueeney, R. J., Lawson, A. C., Migliori, A., Kelley, T. M., Fultz, B., Ramos, M., ...
The phonon density of states and adiabatic sound velocities were measured on fcc-stabilized (242)pu(0.95)Al(0.05). The phonon frequencies and sound velocities decrease considerably (soften) with...
Correa, V. F., Tung, R., Hollen, S. M., Pagliuso, P. G., Moreno, N. O., Lashley, J. C., ...
We report thermal-expansion and magnetostriction results on Ce$_{0.6}$La$_{0.4}$RhIn$_5$ single crystals. This particular La concentration ($x_c \sim$ 0.4) corresponds to the critical one at which...
Low-frequency Einstein mode in the zero-expansion material YbGaGe (2003)
Drymiotis, F. R., Lawes, G., Migliori, A., Ledbetter, H., Betts, J. B., Schmiedeshoff, G. M., ...
This paper was withdrawn by the authors.
Domain State Occurring in the de Haas-van Alphen Effect in Silver (2003)
Hysteresis has been observed in de Haas-van Alphen measurements of the Condon domains in silver, and it shows the first-order nature of the transition to the domain state. The hysteresis, and thus...
Lashley, J. C., Singleton, J., Migliori, A., Betts, J. B., Fisher, R. A., Smith, J. L., ...
We have measured the heat capacities of $\delta-$Pu$_{0.95}$Al$_{0.05}$ and $\alpha-$Pu over the temperature range 2-303 K. The availability of data below 10 K plus an estimate of the phonon...
Manley, M. E., McQueeney, R. J., Fultz, B., Swan-Wood, T., Delaire, O., Goremychkin, E. A., ...
Phonon densities of states (DOS) were obtained from inelastic neutron scattering measurements on Ce0.9Th0.1 at temperatures from 10 to 300 K. The alpha phase showed a significant softening of its...
Elastic and thermodynamic properties of the shape-memory alloy AuZn (2001)
Darling, T. W., Chu, F., Migliori, A., Thoma, D. J., Lashley, J. C., Lang, B. E., ...
The current work reports on the elastic shear moduli, internal friction, and the specific heat of the B2 cubic ordered alloy AuZn as a function of temperature. Measurements were made on...