Magnetic and ferroelectric properties of epitaxial Sr-doped thin films

Park, Y.A.; Sung, K. D.; Hur, N.; Jung, Jong Hoon; Noh, Woo-Suk; Kim, J.-Y.; Yoon, Jaesik; Jo, Y.

doi:10.1016/j.ssc.2009.12.006

Cited by 15 publications

(6 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This 2P r value is lower than those reported for Srdoped BiFeO 3 films ($ 86 lC cm À2 ) 14 and non-doped BiFeO 3 films (100-150 lC cm À2 ) 11,18,19 deposited on SrRuO 3 -buffered substrates. The lower value obtained for our films is consistent with the fact that square saturated hysteresis loops were not achieved despite the large fields applied for switching the polarization.…”

Section: à2contrasting

confidence: 60%

Highly textured Sr, Nb co-doped BiFeO3 thin films grown on SrRuO3/Si substrates by rf- sputtering

Ostos

Raymond

Suárez-Almodovar

et al. 2011

Journal of Applied Physics

View full text Add to dashboard Cite

Electrical detection of nonlinear ferromagnetic resonance in single elliptical permalloy thin film using a magnetic tunnel junction Appl. Phys. Lett. 99, 232506 (2011) Loss of magnetization induced by doping in CeO2 films J. Appl. Phys. 110, 113902 (2011) Giant magnetoelectric torque effect and multicoupling in two phases ferromagnetic/piezoelectric system J. Appl. Phys. 110, 104510 (2011) Magnetic properties of L10-FePt/permalloy exchange-spring films J. Appl. Phys. 110, 103911 (2011) The origin of athermal training in polycrystalline metallic exchange bias thin films Appl. Phys. Lett. 99, 222508 (2011) Additional information on J. Appl. Phys. In this study, (011)-highly oriented Sr, Nb co-doped BiFeO 3 (BFO) thin films were successfully grown on SrRuO 3 /Si substrates by rf-magnetron sputtering. The presence of parasite magnetic phases was ruled out based on the high resolution x-ray diffraction data. BFO films exhibited a columnar-like grain growth with rms surface roughness values of %5.3 nm and average grain sizes of %65-70 nm for samples with different thicknesses. Remanent polarization values (2P r ) of 54 lC cm À2 at room temperature were found for the BFO films with a ferroelectric behavior characteristic of an asymmetric device structure. Analysis of the leakage mechanisms for this structure in negative bias suggests Schottky injection and a dominant Poole-Frenkel trap-limited conduction at room temperature. Oxygen vacancies and Fe 3þ /Fe 2þ trap centers are consistent with the surface chemical bonding states analysis from x-ray photoelectron spectroscopy data. The (011)-BFO/ SrRuO 3 /Si film structure exhibits a strong magnetic interaction at the interface between the multiferroic film and the substrate layer where an enhanced ferromagnetic response at 5 K was observed. Zero-field cooled (ZFC) and field cooled (FC) magnetization curves of this film system revealed a possible spin glass behavior at spin freezing temperatures below 30 K depending on the BFO film thickness.

show abstract

Section: à2contrasting

confidence: 60%

Highly textured Sr, Nb co-doped BiFeO3 thin films grown on SrRuO3/Si substrates by rf- sputtering

Ostos

Raymond

Suárez-Almodovar

et al. 2011

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…Several studies have utilized these techniques to examine the electronic and magnetic states of Fe in BFO and its heterostructures [16][17][18][19]. However, measurements of BFO films by Singh et al [20] and Bea et al [21] showed that the observed magnetic moment might be due to the formation of impurity phases such as the ferrimagnetic γ-Fe 2 O 3 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced ferromagnetic moment in Co-doped BiFeO3 thin films studied by soft x-ray circular dichroism

Singh

Verma

Ishigami

et al. 2013

Journal of Applied Physics

View full text Add to dashboard Cite

BiFeO3 (BFO) shows both ferroelectricity and magnetic ordering at room temperature but its ferromagnetic component, which is due to spin canting, is negligible. Substitution of transitionmetal atoms such as Co for Fe is known to enhance the ferromagnetic component in BFO. In order to reveal the origin of such magnetization enhancement, we performed soft x-ray absorption spectroscopy (XAS) and soft x-ray magnetic circular dichroism (XMCD) studies of BiFe1−xCoxO3 (x = 0 to 0.30) (BFCO) thin films grown on LaAlO3(001) substrates. The XAS results indicated that the Fe and Co ions are in the Fe 3+ and Co 3+ states. The XMCD results showed that the Fe ions show ferromagnetism while the Co ions are antiferromagnetic at room temperature. The XAS and XMCD measurements also revealed that part of the Fe 3+ ions are tetrahedrally co-ordinated by oxygen ions but that the XMCD signals of the octahedrally coordinated Fe 3+ ions increase with Co content. The results suggest that an impurity phase such as the ferrimagnetic γ-Fe2O3 which exists at low Co concentration decreases with increasing Co concentration and that the ferromagnetic component of the Fe 3+ ion in the octrahedral crystal fields increases with Co concentration, probably reflecting the increased canting of the Fe 3+ ions.

show abstract

“…As a new lead free ferroelectric material, the polarization value of BiFeO 3 film can be as high as 110μc/cm 2 , which is close to the polarization value of PbTiZrO3 [4]. BiFeO 3 film has been successfully deposited by many researchers using sputtering [5,6], pulse laser ablation [7][8][9], sol-gel [4,10], etc. Pure phase and well crystalline film is very essential for multiferroics application.…”

Section: Introductionmentioning

confidence: 61%

Pulse laser deposition of BiFeO₃films by polished targets

Song

Huo

2011

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Magnetic and ferroelectric properties of epitaxial Sr-doped thin films

Cited by 15 publications

References 19 publications

Highly textured Sr, Nb co-doped BiFeO3 thin films grown on SrRuO3/Si substrates by rf- sputtering

Highly textured Sr, Nb co-doped BiFeO3 thin films grown on SrRuO3/Si substrates by rf- sputtering

Enhanced ferromagnetic moment in Co-doped BiFeO3 thin films studied by soft x-ray circular dichroism

Pulse laser deposition of BiFeO₃films by polished targets

Contact Info

Product

Resources

About

Magnetic and ferroelectric properties of epitaxial Sr-doped thin films

Cited by 15 publications

References 19 publications

Highly textured Sr, Nb co-doped BiFeO3 thin films grown on SrRuO3/Si substrates by rf- sputtering

Highly textured Sr, Nb co-doped BiFeO3 thin films grown on SrRuO3/Si substrates by rf- sputtering

Enhanced ferromagnetic moment in Co-doped BiFeO3 thin films studied by soft x-ray circular dichroism

Pulse laser deposition of BiFeO3films by polished targets

Contact Info

Product

Resources

About

Pulse laser deposition of BiFeO₃films by polished targets