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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
physics and astronomy
Temperature and field dependence of microwave losses in manganite powders
Journal of Applied Physics, Volume 86, No. 2, Year 1999
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Description
We report systematic measurements of the temperature and field dependence of microwave losses in micron-size powders (∼3 μm) of the manganites Nd0.7Sr0.3MnO3, La0.7Ca0.3MnO3, La0.8Ba0.2MnO3, and La1.4Ca1.6Mn2O7. We fully confirm previous findings of a large increase in zero-field absorption, in La0.7Ba0.3MnO3 and La0.7Sr0.3MnO3, accompanying the onset of ferromagnetism and a concomitant colossal low-field magnetoimpedance (up to 80% at 600 Oe at room temperature). An oversimplified set of computations renders plausible support for interpreting these observations as arising from absorption in the spin system. Possible applications of these novel phenomena are also described. © 1999 American Institute of Physics.
Authors & Co-Authors
Srinivasu, Vallabhapurapu Vijaya
United States, College Park
University of Maryland, College Park
Ghosh, Kartik C.
United States, College Park
University of Maryland, College Park
Statistics
Citations: 91
Authors: 2
Affiliations: 3
Identifiers
Doi:
10.1063/1.371146
ISSN:
00218979