Hostname: page-component-848d4c4894-jbqgn Total loading time: 0 Render date: 2024-06-27T06:04:12.230Z Has data issue: false hasContentIssue false
  • English
  • Français

Synthesis of Copper and Lithium Copper Ferrites as High Magnetization Materials

Published online by Cambridge University Press:  31 January 2011

K. E. Kuehn ,
D. Sriram ,
S. S. Bayya ,
J. J. Simmins  and
R. L. Snyder
K. E. Kuehn
Affiliation:
New York State College of Ceramics at Alfred University, Alfred, New York 14802
D. Sriram
Affiliation:
New York State College of Ceramics at Alfred University, Alfred, New York 14802
S. S. Bayya
Affiliation:
New York State College of Ceramics at Alfred University, Alfred, New York 14802
J. J. Simmins
Affiliation:
New York State College of Ceramics at Alfred University, Alfred, New York 14802
R. L. Snyder
Affiliation:
New York State College of Ceramics at Alfred University, Alfred, New York 14802
Get access

Abstract

The ferrite with composition Cu0.5Fe2.5O4 was heat treated in air and in reducing atmospheres to different temperatures within the solid solution region confirmed by dynamic high-temperautre x-ray characterization. The samples were quenched in oil and air, and lattice parameter, Curie temperature, and saturation magnetization measurements were completed. The magnetization measurements for these samples showed a maximum 4πMs of 0.7729 and 0.5426 T at 10 and 300 K, respectively. The cationic distribution based on the low-temperature 4πMs measurements is (Cu+0.24Fe3+0.76)A[Cu+0.26Fe3+1.74]BO4 → 4.9 µ B. X-ray-pure Cu0.5Fe2.5O4 samples were also synthesized by slow cooling from the formation temperature to 900 °C in a reducing atmosphere. A temperature–PO2 diagram for the stability of Cu0.5Fe2.5O4 under the conditions of the experiment was determined. Low-temperature 4πMs measurements did not indicate an increase in the Cu+ A site occupancy for the samples cooled to 900 °C in a reducing environment above those samples that were quenched from high temperature. Curie temperatures for all Cu0.5Fe2.5O4 samples ranged from 348 to 369 °C. Lithium additions (0.1 mol/unit formula) to copper ferrite Li0.1Cu0.4Fe2.5O4 decreased the room-temperature 4πMs values to 0.5234 T with a corresponding decrease in the 10 K measurements to 0.7047 T. From the low-temperature magnetization measurements, the distribution was (Cu+0.15Fe3+0.85)A[Cu+0.25Li+0.1Fe3+1.65]BO4 → 4.48 µ B.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 7 , July 2000 , pp. 1635 - 1641
Copyright
Copyright © Materials Research Society 2000

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1.Gorter, E.W., Philips Res. Rep. 9, 321 (1954).Google Scholar
2.Dionne, G.F., J. Appl. Phys. 61, 3865 (1987).CrossRefGoogle Scholar
3.Janicki, J., Pietrzak, J., Porebska, A., and Suwalski, J., Phys. Status Solidi A 72, 95 (1982).CrossRefGoogle Scholar
4.Tang, X., Manthiram, A., and Goodenough, J.B., Solid State Chem. 79, 250 (1989).CrossRefGoogle Scholar
5.Sapozhnikova, E.Ya., Davidovich, A.G., Roizenblat, E.M., Zinovik, M.A., Kosheleva, L.V., Maslova, V.M., and Markovskii, E.V., Russ. J. Inorg. Chem. (Engl. Transl.) 26, 945 (1980).Google Scholar
6.Nagarajan, A. and Agajanian, A.H., J. Appl. Phys. 41, 1642 (1969).CrossRefGoogle Scholar
7.Snyder, R.L. and Chen, B.J., Adv. X-ray Anal. 38, 1 (1995).Google Scholar
8.Miyahara, S. and Yino, Y., Jpn. J. Appl. Phys. 4, 310 (1965).CrossRefGoogle Scholar
9.Zinovik, M.A. and Davidovich, A.G., Russ. J. Inorg. Chem. (Engl. Transl.) 26, 855 (1980).Google Scholar
10.Misture, S.T., Chatfield, L., and Snyder, R.L., Powder Diffr. 9, 172 (1994).CrossRefGoogle Scholar
11.Howard, S.A. and Snyder, R.L., J. Appl. Crystallogr. 22, 238 (1989).CrossRefGoogle Scholar
12.Lenglet, M., Kasperek, J., Hannoyer, B., Lopitaux, J., D'Huysser, A., and Tellier, J.C., J. Solid State Chem. 98, 252 (1992).CrossRefGoogle Scholar