Abstract
Polycrystalline MgxAl2xLi0.5(1−x)Fe2.5(1−x) O4 (x = 0.0, 0.2, 0.5, 0.6 and 0.7) ferrites were prepared by standard ceramic method, and characterized by X-ray diffraction and infrared absorption spectroscopy. The spectra show two significant absorption bands in the wave number range of 400–1000 cm−1 arising from interatomic vibrations in the tetrahedral and octahedral coordination compounds. The decrease in intensity and increase in broadness of bands with concentration (x) are explained on the basis of cation distribution. The force constants and bulk modulus are found to decrease with Mg-Al content (x) which suggested weakening of interatomic bonding. An alternate method for the determination of bulk modulus, longitudinal and transverse velocities is suggested. The magnetic and electrical properties of these compounds are explained in the light of structural and optical properties.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
R D Waldron,Phys. Rev. 99, 1727 (1955)
A Chim, Seminars,Ann. Chem. 7, 9 (1974)
W L Konijnenijk,Philos. Res. Rep. Suppl. 1, 30 (1975)
J Preudhomme,Ann. Chim. 9, 31 (1974)
W B Whike and B A De Angelis,Spectrochim. Acta A23, 985 (1967)
K B Modi, K H Jani and H H Joshi,Acta Ciencia Indica 25, 5 (1999)
O S Josyula and J Sobhanadri,Phys. Status Solidi A65, 479 (1981)
B P Ladgaonkar, C B Kolekar and A S Vaingankar,Bull. Mater. Sci. 25, 351 (2002)
U N Trivedi, K H Jani, K B Modi and H H Joshi,J. Mater. Sci. Lett. 19, 1271 (2000)
D Ravinder,Mater. Lett. 40, 205 (1999)
S S Beilad, R B Pujar and B K Chougule,Indian J. Pure Appl. Phys. 36, 598 (1998)
G J Baldha, K G Saija, K B Modi, H H Joshi and R G Kulkarni,Mater. Lett. 53, 233 (2002)
K B Modi, J D Gajera, M C Chhantbar, K G Saija, G J Baldha and H H Joshi,Mater. Lett. 57, 4049 (2003)
C G Whinfrey, D W Eckart and A Tauber,J. Am. Chem. Soc. 82, 2695 (1960)
B D Cullity,Elements of X-ray diffraction (Addison-Wesley Press, Reading, MA, 1959)
S C Watawe, Ph.D. Thesis, Kolhapur University, Kolhapur, India, 2000
K J Standly,Oxide magnetic material (Clarenden Press, Oxford, 1972)
M J Buerger,J. Crystal structure analysis (Wiley, New York, 1960)
P Tarte and J Preudhomme,Spectrochim. Acta A27, 1817 (1971)
B J Evans and S Hafner,J. Phys. Chem. Solids 29, 1573 (1968)
M A Amer, M A Ahmed, M K El-Nimr and M A Mostafa,Hyperfine Interactions 96, 91 (1995)
S A Patil, S M Otari, V C Mahajan and A B Patil,Solid State Commun. 78, 39 (1991)
P V Reddy and V D Reddy,J. Magn. Magn. Mater. 136, 279 (1994)
D Ravinder and T Alivea Manga,Mater. Lett. 41, 254 (1999);37, 51 (1998)
D Ravinder, K Vijayakumar and B S Boyanov,Acoustics Lett. 21, 30 (1997)
S L Kakani and C Hemrajani,Text book of solid state physics (Sultan Chand & Sons, New Delhi, 1997)Pramana — J. Phys.,Vol. 62,No. 5, May2004
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Modi, K.B., Gajera, J.D., Pandya, M.P. et al. Far-infrared spectral studies of magnesium and aluminum co-substituted lithium ferrites. Pramana - J Phys 62, 1173–1180 (2004). https://doi.org/10.1007/BF02705264
Received:
Revised:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02705264