Magnetodielectric effect of Bi6Fe2Ti3O18 film under an ultra-low magnetic field

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dc.creatorLu, J.
dc.creatorQiao, L. J.
dc.creatorMa, X. Q.
dc.creatorChu, W. Y.
dc.date2006-02-20
dc.date2006-02-21
dc.date.accessioned2026-07-07T07:01:49Z
dc.date.available2026-07-07T07:01:49Z
dc.descriptionGood quality and fine grain Bi6Fe2Ti3O18 magnetic ferroelectric films with single-phase layered perovskite structure have been successfully prepared via metal organic decomposition (MOD) method. Results of low-temperature magnetocapacitance measurements reveal that an ultra-low magnetic field of 10 Oe can produce a nontrivial magnetodielectric (MD) response in zero-field-cooling condition, and the relative variation of dielectric constants in magnetic field is positive, i.e., MD=0.05, when T<55K, but negative with a maximum of MD=-0.14 when 55K<T<190K. The magnetodielectric effect appears a sign change at 55K, which is due to transition from antiferromagnetic to weak ferromagnetic; and vanishes abruptly around 190K, which is thought to be associated with order-disorder transition of iron ion at B site of perovskite structures. The ultra-low-field magnetodielectric behaviour of Bi6Fe2Ti3O18 film has been discussed in the light of quasi-two-dimension unique nature of local spin order in ferroelectric film. Our results allow expectation on low-cost applications of detectors and switches for extremely weak magnetic fields in a wide temperature range 55K-190K.
dc.description10 pages 4 figures, planned to submit to J. Phys.: Condensed Matter
dc.identifierhttps://arxiv.org/abs/cond-mat/0602450
dc.identifierhttp://arxiv.org/abs/cond-mat/0602450
dc.identifierJ. Phys.: Condens. Matter 18 (2006) 4801-4807
dc.identifierdoi:10.1088/0953-8984/18/20/004
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/108392
dc.subjectMaterials Science
dc.subjectMesoscale and Nanoscale Physics
dc.titleMagnetodielectric effect of Bi6Fe2Ti3O18 film under an ultra-low magnetic field
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