Magnetization reversal and exchange bias study in bulk Gd^sub 1-x^Y^sub x^CrO^sub 3^ (x?=?0.0–1.0)

Single phase samples of Gd1−xYxCrO3 (x = 0.0–1.0) were prepared by sol-gel method. Lattice parameters obtained from the Rietveld refinement are found to decrease from a = 5.3129 Å, b = 5.5210 Å, and c = 7.6040 Å for x = 0 to a = 5.2428 Å, b = 5.5208 Å and c = 7.5340 Å for x = 1.0. The temperature va...

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Bibliographic Details
Published inJournal of magnetism and magnetic materials Vol. 461; p. 91
Main Authors Dash, Bibhuti B, Ravi, S
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier BV 01.09.2018
Subjects
Anisotropy
Antiferromagnetism
Bias
Braided composites
Carbon fibers
Exchanging
Ferroelectrics
Ferromagnetism
Gadolinium
Lattice parameters
Magnetism
Magnetization reversal
Materials science
Neel temperature
Sol-gel processes
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Summary:Single phase samples of Gd1−xYxCrO3 (x = 0.0–1.0) were prepared by sol-gel method. Lattice parameters obtained from the Rietveld refinement are found to decrease from a = 5.3129 Å, b = 5.5210 Å, and c = 7.6040 Å for x = 0 to a = 5.2428 Å, b = 5.5208 Å and c = 7.5340 Å for x = 1.0. The temperature variation of magnetization measurements show that all samples exhibit antiferromagnetic transitions and the Neel temperature (TN) decreases from TN = 174 K for x = 0.0 to 142 K for x = 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 136 K for x = 0 to 42 K for x = 0.70. These samples exhibit tunable positive and negative exchange bias fields with a maximum negative value of −1.17 kOe for x = 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.
ISSN:0304-8853
1873-4766