Zobrazeno 1 - 10 of 34 pro vyhledávání: '"S. J. Collocott"'
1
A comparison of the magnetic properties of commercial HDDR powder with those of other commercial sintered rare-earth magnets
Autor: S J Collocott, J B Dunlop
Publikováno v: Journal of Physics D: Applied Physics. 30:1477-1482
Rare-earth permanent magnet motors are being used increasingly in electrical machines and modern production methods frequently require in situ magnetization of the magnets. Magnetic measurements have been performed on magnetically anisotropic powder
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ddfb7196aca73ca75a8950bab067e865
https://doi.org/10.1088/0022-3727/30/10/014
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2
Magnetic properties of nanocomposite and materials with an excess of Fe
Autor: S J Collocott, P B Gwan, M. Jurczyk, J B Dunlop
Publikováno v: Journal of Physics D: Applied Physics. 29:2284-2289
Two-phase nanocomposite materials have been prepared by high-energy ball-milling (HEBM) (2:14:1 phase) (u = 0, 0.75, 1.5 or 3.0; y = 0 or 11.6 and z = 0 or 0.5) or (1:12 phase), with excess Fe and then annealing. Magnetic properties of materials cont
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::06a303ee5046f82f848013c067e4e999
https://doi.org/10.1088/0022-3727/29/9/009
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3
New rare‐earth intermetallic phases R3(Fe,M)29Xn: (R=Ce, Pr, Nd, Sm, Gd; M=Ti, V, Cr, Mn; and X=H, N, C) (invited)
Autor: R. L. Davis, J. B. Dunlop, S. J. Collocott, Hong-Shuo Li, A. Margarian, J. M. Cadogan, D. H. Ryan
Publikováno v: Journal of Applied Physics. 76:6138-6143
New rare‐earth (R), iron‐rich ternary intermetallic compounds of the form R3(Fe,M)29 with the monoclinic Nd3(Fe,Ti)29 structure (space group P21/c, ♯14, Z=2) have recently been shown to form with R=Ce, Nd, Pr, Sm, and Gd, and M=Ti, V, Cr, and M
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::52a40df0cec339c680f2940ff9d0900a
https://doi.org/10.1063/1.358333
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5
Specific heat from 0.4 to 7 K and magnetization from 2 to 40 K of samarium
Autor: S J Collocott, Andrew Stewart
Publikováno v: Journal of Physics: Condensed Matter. 4:6743-6750
Measurements of the specific heat from 0.4 to 7 K have been made on two polycrystalline specimens of samarium of different purity. There are differences in the specific heat of the two specimens between 2 and 7 K which are attributed to differing mag
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e9b135ec12c46986d078310680570738
https://doi.org/10.1088/0953-8984/4/32/009
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6
Thermal properties of paratellurite (TeO2) at low temperatures
Autor: S. J. Collocott, G K White, J. G. Collins
Publikováno v: Journal of Physics: Condensed Matter. 2:7715-7718
Measurements of the heat capacity, Cp, from 0.6 to 15 K can be represented by Cp=(0.32+or-0.02)T3 mJ mol-1 K-s ( theta D0=265+or-10 K) below 10 K. Linear thermal expansivities parallel ( alpha /sub ///) and perpendicular ( alpha perpendicular to ) to
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7ab735a45893e136fdb6ac0a2784f62e
https://doi.org/10.1088/0953-8984/2/37/015
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7
Structural and magnetic properties of Nd2(Fe,Ti)19
Autor: P. B. Gwan, R. L. Davis, J. B. Dunlop, J. M. Cadogan, S. J. Collocott, Hong-Shuo Li, A. Margarian
Publikováno v: Journal of Applied Physics. 75:7114-7116
Alloys with the composition Nd2(Fe,Ti)19 can exist in two crystal structures depending on the preparation technique. Melt‐spun material has a hexagonal TbCu7‐type structure (a=4.902 A, c=4.248 A) for a range of quenching speeds. Alloys prepared b
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::198eeb0067bd21cc75f1e85c13047e1b
https://doi.org/10.1063/1.356696
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8
Anomalous magnetic viscosity in the bulk-amorphous ferromagnetNd60Fe20Co10Al10
Autor: J. B. Dunlop, S. J. Collocott
Publikováno v: Physical Review B. 66
Magnetic viscosity in ferromagnetic materials is the time dependence of magnetization, $M(t),$ in a constant field and is a result of the thermal activation of irreversible processes. On the major hysteresis loop and over short times, $M(t)$ can be r
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::15cea30eda5629c6f5472bf89e7a4855
https://doi.org/10.1103/physrevb.66.224420
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9
Magnetic properties of YCo4B‐based compounds
Autor: Y.C. Chuang, X. K. Sun, F.R. de Boer, Z. G. Zhao, J. B. Dunlop, S. J. Collocott
Publikováno v: Journal of Applied Physics. 73:5920-5922
The magnetic properties of YCo4B-based compounds have been investigated. The Curie temperature T(C) of YCo4B does not change upon substitution of 20% of the Y ions by Nd or 20% of the B ions by C. T(C) increases significantly upon substitution of Fe
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ca683e57ce739dbc834d0fbfbfa48d59
https://doi.org/10.1063/1.353521
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10
Phonon properties and the specific heat of YBa2Cu3O7and Bi2Sr2CaCu2O8+x
Autor: S J Collocott, J G Collins
Publikováno v: Superconductor Science and Technology. 4:S202-S204
The lattice vibrational spectra, g( nu ), of YBa2Cu3O7 and Bi2Sr2CaCu2O8+x, are used to predict qualitatively the observed behaviour of their lattice specific heat. The temperature dependence of the Debye temperature, theta D(T), is calculated from p
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3f9da8fba7e813b5731a38aa1c8af1c8
https://doi.org/10.1088/0953-2048/4/1s/053
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