Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8152807 | Journal of Magnetism and Magnetic Materials | 2018 | 25 Pages |
Abstract
Single phase samples of Gd1âxYxCrO3 (xâ¯=â¯0.0-1.0) were prepared by sol-gel method. Lattice parameters obtained from the Rietveld refinement are found to decrease from aâ¯=â¯5.3129â¯Ã
, bâ¯=â¯5.5210â¯Ã
, and câ¯=â¯7.6040â¯Ã
for xâ¯=â¯0 to aâ¯=â¯5.2428â¯Ã
, bâ¯=â¯5.5208â¯Ã
and câ¯=â¯7.5340â¯Ã
for xâ¯=â¯1.0. The temperature variation of magnetization measurements show that all samples exhibit antiferromagnetic transitions and the Neel temperature (TN) decreases from TNâ¯=â¯174â¯K for xâ¯=â¯0.0 to 142â¯K for xâ¯=â¯1.0. Interesting magnetization reversal behavior is observed as the temperature is lowered from TN under field cooled condition and the magnetic compensation temperature, Tcomp is found to decrease from 136â¯K for xâ¯=â¯0 to 42â¯K for xâ¯=â¯0.70. These samples exhibit tunable positive and negative exchange bias fields with a maximum negative value of â1.17â¯kOe for xâ¯=â¯0.50. The origin of magnetization reversal and exchange bias field is explained by considering the competition between the paramagnetic moment of Gd3+ ions under the influence of negative internal field and the weak ferromagnetic component of Cr3+ ions due to canted antiferromagnetic ordering.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Bibhuti B. Dash, S. Ravi,