Structural transition and anisotropic properties of single crystalline SrFe2As2 (2008)
Kreyssig, A., Nandi, S., Ni, N., Bud'ko, S. L., Kracher, A., ...
Plate-like single crystals of SrFe2As2 as large as 3x3x0.5 mm3 have been grown out of Sn flux. The SrFe2As2 single crystals show a structural phase transition from a high temperature tetragonal phase...
Exotic (anti)ferromagnetism in single crystals of Pr6Ni2Si3 (2008)
Janssen, Y., Dennis, K. W., Prozorov, R., Canfield, P. C., McCallum, R. W.
The ternary intermetallic compound Pr6Ni2Si3, is a member of a structure series of compounds based on a triangular structure where the number of Pr atoms in the prism cross section can be...
Magnetic and thermal properties of the S = 1/2 zig-zag spin-chain compound In2VO5 (2007)
Singh, Yogesh, McCallum, R. W., Johnston, D. C.
Static magnetic susceptibility \chi, ac susceptibility \chi_{ac} and specific heat C versus temperature T measurements on polycrystalline samples of In2VO5 and \chi and C versus T measurements on the...
Low temperature heat capacity of Fe_{1-x}Ga_{x} alloys with large magneostriction (2007)
Hill, J. M., McQueeney, R. J., Wu, Ruqian, Dennis, K., McCallum, R. W., Huang, M., ...
The low temperature heat capacity C_{p} of Fe_{1-x}Ga_{x} alloys with large magnetostriction has been investigated. The data were analyzed in the standard way using electron ($\gamma T$) and phonon...
A small sealed Ta crucible for thermal analysis of volatile metallic samples (2005)
Janssen, Y., Angst, M., Dennis, K. W., Canfield, P. C., McCallum, R. W.
Differential thermal analysis on metallic alloys containing volatile elements can be highly problematic. Here we show how measurements can be performed in commercial, small-sample, equipment without...
Differential thermal analysis and solution growth of intermetallic compounds (2005)
Janssen, Y., Angst, M., Dennis, K. W., McCallum, R. W., Canfield, P. C.
To obtain single crystals by solution growth, an exposed primary solidification surface in the appropriate, but often unknown, equilibrium alloy phase diagram is required. Furthermore, an appropriate...
YbGaGe: normal thermal expansion (2004)
Janssen, Y., Chang, S., Cho, B. K., Llobet, A., Dennis, K. W., McCallum, R. W., ...
We report evidence of the absence of zero thermal expansion in well-characterized high-quality polycrystalline samples of YbGaGe. High-quality samples of YbGaGe were produced from high-purity...
Plastic Deformation in an Al-Cu-Fe Isosahedral Alloy. (1998)
Shield, J. E., Kramer, M. J., McCallum, R. W.
Al-cu-fe quasicrystalline alloys have been deformed by high-temperature creep between 680 and 740 c. deformations greater that 30% were achieved without cracking. analysis of the data in the...
The effect of grain size on magnetic properties in Sm2Fe17Nx (1998)
Shield, Jeffrey E., Branagan, D.J., Li, C.P., McCallum, R.W.
The microstructures of melt spun Sm11Fe89 and (Sm11Fe89)94Ti3C3 have been investigated under different solidification conditions. The magnetic properties of the nitrided materials have been related...
Kramer, M.J., Li, C.P., Dennis, K.W., McCallum, R.W., Sellers, C.H., Branagan, D.J., ...
For the Nd2Fe14B (2-14-1) compound, the optimal grain size should be smaller than the size of the single domain size of 150 nm. Transition metal carbides (TMC) also reduce the quench rate necessary...
Magnetic Properties of Nd3+ in Nd-Ba-Cu-O-compounds (1994)
Allenspach, P, Mesot, J, Staub, U, Guillaume, M, Furrer, A, Yoo, S-I, ...
Icosahedral phase stabilities in Al-Cu-Ru alloys (1992)
Shield, Jeffrey E., Hoppe, C., McCallum, R.W., Goldman, A.I., Kelton, K.F., Gibbons, P.C.
By examining a wide region of the Al-Cu-Ru phase diagram, a thorough analysis of the compositional and thermal stability of the icosahedral phase has been completed. The primary solidification...
Icosahedral phase stabilities in Al-Cu-Ru alloys (1992)
Shield, Jeffrey E., Hoppe, C., McCallum, R.W., Goldman, A.I., Kelton, K.F., Gibbons, P.C.
By examining a wide region of the Al-Cu-Ru phase diagram, a thorough analysis of the compositional and thermal stability of the icosahedral phase has been completed. The primary solidification...
DeCross, A J, Marshall, B J, McCallum, R W, Hoffman, S R, Barrett, L J, Guerrant, R L
Since the methods for metronidazole susceptibility testing of Helicobacter pylori have not been standardized or validated, we compared three methods that are used to test the metronidazole...
Mittal, R K, Rochester, D F, McCallum, R W
To determine the effect of contraction of the diaphragm on the lower esophageal sphincter (LES) pressure, we studied eight healthy volunteers during spontaneous breathing, maximal inspiration, and...
Mechanism of histamine-induced excitation of the cat pylorus.
Biancani, P, CiCalzi, L K, McCallum, R W
Intravenous histamine causes high amplitude repetitive phasic contractions of the in vivo cat pylorus but has little effect on the antrum and duodenum. The genesis of this phasic response was studied...
DeCross, A J, Marshall, B J, McCallum, R W, Hoffman, S R, Barrett, L J, Guerrant, R L
Since the methods for metronidazole susceptibility testing of Helicobacter pylori have not been standardized or validated, we compared three methods that are used to test the metronidazole...
Mittal, R K, Rochester, D F, McCallum, R W
To determine the effect of contraction of the diaphragm on the lower esophageal sphincter (LES) pressure, we studied eight healthy volunteers during spontaneous breathing, maximal inspiration, and...
Mechanism of histamine-induced excitation of the cat pylorus.
Biancani, P, CiCalzi, L K, McCallum, R W
Intravenous histamine causes high amplitude repetitive phasic contractions of the in vivo cat pylorus but has little effect on the antrum and duodenum. The genesis of this phasic response was studied...
Does body posture affect the incidence and mechanism of gastro-oesophageal reflux?
Freidin, N, Mittal, R K, McCallum, R W
We studied eight patients with gastro-oesophageal reflux disease to compare the frequency and mechanism of reflux in the upright and supine positions. Simultaneous oesophageal manometry and pH...
Sleep and nocturnal acid reflux in normal subjects and patients with reflux oesophagitis.
Freidin, N, Fisher, M J, Taylor, W, Boyd, D, Surratt, P, McCallum, R W, ...
Nocturnal gastro-oesophageal reflux may be important in the pathogenesis of reflux oesophagitis. This study aimed to determine whether: (1) gastro-oesophageal reflux occurs during sleep in patients...
Lane, W H, Ippoliti, A F, McCallum, R W
An intravenous bolus of pentagastrin significantly increased the amplitude and duration of oesophageal body contractions in seven patients with diffuse oesophageal spasm (DES) when compared with five...
Effect of the diaphragmatic contraction on lower oesophageal sphincter pressure in man.
Mittal, R K, Rochester, D F, McCallum, R W
The effect of diaphragmatic contraction and relaxation on the lower oesophageal sphincter (LOS) pressure was studied in 10 healthy volunteers. Pressures in the oesophagus, LOS, and stomach were...