Cation-disorder-enhanced magnetization in pulsed-laser-deposited CuFe2O4 films

Yang, Aria; Chen, Z.; Zuo, Xu; Arena, Dario; Kirkland, J.; Vittoria, C.; Harris, V. G.
June 2005
Applied Physics Letters;6/20/2005, Vol. 86 Issue 25, p252510
Academic Journal
Copper ferrite films have been deposited on (100) MgO substrates by pulsed-laser deposition. The oxygen pressure used in deposition was varied from 1 to 120 mTorr with the substrate temperature fixed at 700 °C. Magnetization values are measured to increase with oxygen pressure, reaching a maximum value of 2480 G, which is a 42% increase over the bulk equilibrium value. Extended x-ray absorption spectroscopy shows that the Cu cation inversion δ [defined as (Cu1-δFeδ)tet[CuδFe2-δ]octO4] decreases monotonically from 0.72 to 0.55 with increasing saturation magnetization.


Related Articles

  • Study of CuFe2O4—SnO2 nanocomposites by Mössbauer spectroscopy with high velocity resolution. Oshtrakh, M. I.; Selvan, R. Kalai; Augustin, C. O.; Semionkin, V. A. // Hyperfine Interactions;2008, Vol. 183 Issue 1-3, p37 

    High velocity resolution Mössbauer spectroscopy was used to study of (CuFe2O4)1 − x (SnO2) x nanocomposites ( x = 0, 1, 5, 10, 20 wt.%). Mössbauer spectra were measured at room temperature with registration in 4,096 channels and further presentation in 1,024 channels. Mössbauer...

  • Fluctuation in occupancy of Cu2+ ions in Zn- and Cd-substituted Cu-ferrites. Siddique, M.; Khan, Rao Tahir Ali; Shafi, M. // Journal of Radioanalytical & Nuclear Chemistry;Sep2008, Vol. 277 Issue 3, p531 

    Mössbauer effect technique has been used for the comparative study of Cu1− x Zn x Fe2O4 and Cu1− x Cd x Fe2O4 ( x = 0.0−1.0) ferrites. Both Zn2+ and Cd2+ cations are divalent, non-magnetic ions with different ionic radii. With the substitution of these non-magnetic cations...

  • Thermal effects on the magnetic properties of titanium modified cobalt ferrite. Nlebedim, I. C.; Jiles, D. C. // Journal of Applied Physics;2015, Vol. 117 Issue 17, p17A506-1 

    The temperature dependence of the magnetic properties of titanium modified cobalt ferrite is presented. The change of maximum magnetization obtained at H≈2.4MA/m between any two temperatures increases systematically with composition, which is desirable for applications in devices....

  • Synthesis, sintering behavior and magnetic properties of Cu-substituted CoZ hexagonal ferrites. Kračunovska, S.; Töpfer, J. // Journal of Materials Science: Materials in Electronics;May2011, Vol. 22 Issue 5, p467 

    Cu-substituted Z-type BaCoCuFeO hexagonal ferrites (0 ≤ x ≤ 1) were prepared by the standard oxide route. Almost single phase Z-type ferrite powders were observed after calcination at 1,260 °C. The permeability of samples sintered at 1,260 °C varies with the Cu content; a...

  • The influence of the coprecipitation conditions on the low-temperature formation of barium hexaferrite. Lisjak, Darja; Drofenik, Miha // Journal of Materials Science;Oct2007, Vol. 42 Issue 20, p8606 

    We have investigated the formation of barium hexaferrite via the coprecipitation method. Various reagent salts and solvents were tested, and the coprecipitates were calcined at 300–800 °C for 1–50 h. The samples were characterized with X-ray powder diffraction, electron...

  • Cation distribution of Li-Ti mixed ferrites (abstract). Reddy, M. Bhagavantha; Reddy, P. Venugopal // Journal of Applied Physics;5/15/1994, Vol. 75 Issue 10, p6125 

    Presents an abstract of a study regarding cation distribution of lithium-titanium mixed ferrites of different compositions prepared by ceramic technique.

  • Investigation of magnetic phase transitions in dilute copper ferrites. Opalenko, A.; Korshak, A.; Antoshina, L. // Physics of the Solid State;Feb2011, Vol. 53 Issue 2, p337 

    Mössbauer spectra of copper ferrites CuGaAlFeO ( x = 0.3, 0.4, 0.5) have been measured at temperatures in the range from 90 to 295 K. The degree of disturbance of long-range magnetic order has been determined as a function of the temperature. The Curie temperature has been found for the...

  • Dependence on cation distribution of particle size, lattice parameter, and magnetic properties in nanosize Mn–Zn ferrite. Rath, Chandana; Anand, S.; Das, R. P.; Sahu, K. K.; Kulkarni, S. D.; Date, S. K.; Mishra, N. C. // Journal of Applied Physics;2/15/2002, Vol. 91 Issue 4, p2211 

    In Mn[sub 1-x]Zn[sub x]Fe[sub 2]O[sub 4] (x=0 to 1) nanosize particles prepared through hydrothermal precipitation we observe a decrease in particle size from 13 to 4 nm with increasing Zn concentration from 0 to 1. The lattice constant, a, for all Mn/Zn concentrations is found to be less than...

  • Spiral-Logarithmic Structures in a Heisenberg Ferromagnet. Gutshabash, E. Sh. // JETP Letters;3/25/2001, Vol. 73 Issue 6, p279 

    Spiral-logarithmic structure is suggested as a stationary solution of a modified equation for the Heisenberg model, and the single- and N-soliton solutions are constructed on this base. � 2001 MAIK �Nauka / Interperiodica�.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics