@article { ISI:000231564300102,
	title = {Effect of disorder on the magnetic properties of LaMn0.5Fe0.5O3},
	journal = {Physical Review B},
	volume = {72},
	number = {5},
	year = {2005},
	month = {AUG},
	pages = {054426},
	publisher = {AMERICAN PHYSICAL SOC},
	type = {Article},
	address = {ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA},
	abstract = {<p>Polycrystalline LaMn0.5Fe0.5O3 is synthesized by a low-temperature method and the magnetic properties of the resulting powder have been studied after annealing the sample in air at different temperatures in the range 200 degrees C-1350 degrees C. Room temperature Mossbauer spectroscopic studies show that the Fe ions are present in the +3 oxidation state in the material. However, the magnetic properties vary widely in an unexpected manner when samples are annealed at different temperatures. Zero field cooled magnetization studies show a cusp below 100 K, for the sample annealed at 200 degrees C, indicating a spin-glass-like or superparamagnetic behavior. However, this cusp disappears completely when the sample is annealed at 700 degrees C but still showing a magnetic hysteresis loop with reduced magnetization at low temperatures. The cusp again appears when the sample is annealed at higher temperatures with increasing low-temperature magnetization. EPR and IR spectroscopic studies indicate changes in the distribution of Mn3+ and Fe3+ ions in the lattice. The overall results can be explained in terms of random distribution of Mn3+ and Fe3+ ions in the lattice and formation of some magnetic clusters, with the degree of distribution of the ions varying for samples annealed at different temperatures.</p>},
	issn = {1098-0121},
	doi = {10.1103/PhysRevB.72.054426},
	author = {Bhame, Shekhar D. and Joly, V. L. Joseph and Joy, Pattayil Alias}
}
