Zobrazeno 1 - 10
of 189
pro vyhledávání: '"A H Morrish"'
Publikováno v:
Solid State Communications. 126:535-540
The linear and nonlinear low field AC susceptibilities of Zn 0.75 Co 0.25 Fe 0.5 Cr 1.5 O 4 show peaks due to non-critical contributions, which mask the peak due to spin glass ordering. They extend into the region of temperatures in which Mossbauer s
Publikováno v:
International Journal of Modern Physics B. 15:3312-3316
A unit cell of a spinel ferrite is just under 1 nm, actually about 0.8 nm. Particles approaching this size can be expected to possess properties that differ from the bulk material. Bulk polycrystalline Zn-ferrite ( ZnFe2O4 ) has been ball milled; aft
Publikováno v:
Journal of Materials Science. 36:5835-5838
Conversion-electron Mossbauer spectra of epitaxial α″-Fe16N2 and α′-Fe8N films have been studied and their differences are discussed in detail. The Mossbauer spectrum of α″-Fe16N2 can be decomposed into three subspectra, which correspond to
Publikováno v:
Solid State Communications. 116:575-580
The phenomenon of spin freezing is found to be present in KMnFeF 6 , as is found in canonical spin glasses, using Mossbauer spectroscopy. The spin structure derived in the present study using an applied magnetic field agrees with the results of an ea
Publikováno v:
Journal of Physics: Condensed Matter. 12:9667-9687
Non-linear susceptibility (χnl) measurements on MgAl1.4Fe0.6O4 show spin-glass ordering in a cubic spinel ferrite, for the first time. The ordering gives a peak in the temperature dependence of χnl, which shows that the spin ordering is a cooperati
Publikováno v:
Physical Review B. 62:6530-6537
The site preference and magnetic properties of Zn-Zr substituted BaM ferrite BaFe12-xZnx/2Zrx/2O19 nanoparticles with x=0-1.6 have been studied using Mossbauer spectra and magnetic measurement. The results show that the magnetizations and magnetocrys
Publikováno v:
Li, Z W, Morrish, A H & Jiang, J 1999, ' Magnetoresistance and phase composition of La-Sn-Mn-O systems ', Physical Review B, vol. 60, no. 14, pp. 10284 . https://doi.org/10.1103/PhysRevB.60.10284
The transport properties of the manganites La1 - xSnxMnO3 + delta with x = 0.1-0.5 and of Fe-doped samples have been comprehensively studied using magnetoresistance measurements, Fe-57 and Sn-119 Mossbauer spectroscopy, and x-ray diffraction. At the
Publikováno v:
Hyperfine Interactions. 113:485-492
Mossbauer spectra of (La1-xSnx)(2)(Mn0.985Fe0.015)(2)O-y (x = 0.2, 0.3, 0.4 and 0.5) from room temperature to 4.2 K have been studied; in addition X-ray diffraction patterns at room temperature have been obtained. The results show that the phase comp
Publikováno v:
Physical Review B. 55:14125-14128
A new manganite (La0.7Sn0.3)(2)Mn2O7 has been discovered that exhibits colossal magnetoresistance (CMR) near the Curie temperature and semiconductor-metal transition temperatures similar to that of La1-xDxMnO3 (D=Ca2+, Pb2+, etc.) or ABO(3) compounds
Autor:
Allan H. Morrish, Z. W. Li
Publikováno v:
Physical Review B. 55:3670-3676
M\"ossbauer spectra of ${\mathrm{Sm}}_{2}$ ${\mathrm{Fe}}_{17}$ and ${\mathrm{Sm}}_{2}$ ${\mathrm{Fe}}_{17}$ ${\mathrm{N}}_{\mathrm{y}}$ in a temperature range between 77 K and the Curie temperature have been studied. The exchange integrals, as a fun