Journal ArticleDOI
Enhancement of magnetic and ferroelectric properties of BiFeO3 by Er and transition element (Mn, Co) co-doping
Reads0
Chats0
TLDR
The phase transition from a rhombohedral symmetry (R3c) for BFO to an orthorhombic symmetry (Ibmm) for BEFO, BEFMO and BEFCO has been observed as discussed by the authors.Abstract:
BiFeO3(BFO), Bi0.8Er0.2FeO3 (BEFO), Bi0.8Er0.2Fe0.9Mn0.1O3 (BEFMO) and Bi0.8Er0.2Fe0.9Co0.1O3(BEFCO) nanoparticles were prepared by sol–gel method having an average size of 200 nm for BFO, under100 nm for BEFO and under 60 nm for BEFMO and BEFCO. Phase transition from a rhombohedral symmetry (R3c) for BFO to an orthorhombic symmetry (Ibmm) for BEFO, BEFMO and BEFCO has been observed. The phase transformation combined with size reduction has significantly improved both ferroelectric and ferromagnetic behaviors of the doped samples in a similar way. The formation of dipolar defect complexes (DDCs) in the doped samples also contributes to the improved ferroelectric property with saturated polarization (Ps) of 0.375 μC/cm2 and remanent polarization (Pr) of 0.244 μC/cm2 for BEFMO. Size effect may also impact the simultaneously developed Pr for BEFMO and BEFCO. Owning to the interactions between the ferromagnetic and antiferromagnetic microdomains, improved saturated magnetization (Ms) and remanent magnetization (Mr) are also observed in BEFMO.read more
Citations
More filters
Journal ArticleDOI
Effect of Eu, Mn co-doping on structural, optical and magnetic properties of BiFeO3 nanoparticles
Yiyi Zhu,Chuye Quan,Yuhui Ma,Qi Wang,Weiwei Mao,Xingfu Wang,Jian Zhang,Yonggang Min,Jianping Yang,Xing’ao Li,Wei Huang,Wei Huang +11 more
TL;DR: In this paper, the impact of Eu, Mn co-doping samples on the properties of structural, morphology, optical band gap, ferroelectric and ferromagnetic properties have been investigated.
Journal ArticleDOI
Comparative studies of pure, Ca-doped, Co-doped and co-doped BiFeO3 nanoparticles
Chuye Quan,Yumin Han,Ning Gao,Weiwei Mao,Jian Zhang,Jianping Yang,Xing’ao Li,Wei Huang,Wei Huang +8 more
TL;DR: In this paper, X-ray diffraction data and Raman spectra reflect a structural phase transition from rhombohedral (pure BiFeO3) to two phase coexistence (rhombohedral R3c and cubic PM-4M).
Journal ArticleDOI
Experimental and first principles investigation of the multiferroics BiFeO3 and Bi0.9Ca0.1FeO3: Structure, electronic, optical and magnetic properties
Ning Gao,Chuye Quan,Yuhui Ma,Yuhui Ma,Yumin Han,Zhenli Wu,Weiwei Mao,Jian Zhang,Jianping Yang,Xing’ao Li,Wei Huang,Wei Huang +11 more
TL;DR: In this paper, the structure, electronic, optical and magnetic properties of BiFeO3 (BFO) and Bi0.9Ca0.1 (BCFO) have been investigated using experimental methods.
Journal ArticleDOI
First principles investigation on the electronic, magnetic and optical properties of Bi 0.8 M 0.2 Fe 0.9 Co 0.1 O 3 (M = La, Gd, Er, Lu)
Ning Gao,Wei Chen,Ren Zhang,Jian Zhang,Zhenli Wu,Weiwei Mao,Jianping Yang,Xing’ao Li,Wei Huang,Wei Huang +9 more
TL;DR: In this paper, the effect of rare earth element dopings on the electronic, magnetic and optical properties of BiFe0.9Co0.1O3 (BFCO) was investigated by first-principles calculations.
Journal ArticleDOI
Magneto-electric characteristics in (Mn, Cu) co-doped BiFeO3 multiferroic nanoparticles
Ayesha Khalid,Shahid Atiq,Shahid M. Ramay,Asif Mahmood,Ghulam M. Mustafa,Saira Riaz,Shahzad Naseem +6 more
TL;DR: In this paper, multiferroic nanoparticles having general formula BiFe0.99-xMnxCu0.01O3 were prepared by a chemically derived method to explore the magneto-electric characteristics of this new class of materials.
References
More filters
Journal ArticleDOI
Multiferroic and magnetoelectric materials
TL;DR: A ferroelectric crystal exhibits a stable and switchable electrical polarization that is manifested in the form of cooperative atomic displacements that arises through the quantum mechanical phenomenon of exchange.
Journal ArticleDOI
Epitaxial BiFeO3 multiferroic thin film heterostructures.
Jian Wang,Jeffrey B. Neaton,Haimei Zheng,Valanoor Nagarajan,Satishchandra Ogale,B. T. Liu,Dwight Viehland,V. Vaithyanathan,Darrell G. Schlom,Umesh V. Waghmare,Nicola A. Spaldin,Karin M. Rabe,Manfred Wuttig,Ramamoorthy Ramesh +13 more
TL;DR: Enhanced polarization and related properties in heteroepitaxially constrained thin films of the ferroelectromagnet, BiFeO3, and combined functional responses in thin film form present an opportunity to create and implement thin film devices that actively couple the magnetic and ferroelectric order parameters.
Journal ArticleDOI
Physics and Applications of Bismuth Ferrite
Gustau Catalan,James F. Scott +1 more
TL;DR: In this paper, the authors summarize both the basic physics and unresolved aspects of BiFeO3 and device applications, which center on spintronics and memory devices that can be addressed both electrically and magnetically.
Journal ArticleDOI
Above-bandgap voltages from ferroelectric photovoltaic devices
S. Y. Yang,Jan Seidel,Jan Seidel,Byrnes Steven J,Byrnes Steven J,Padraic Shafer,Chan-Ho Yang,Marta D. Rossell,Pu Yu,Ying-Hao Chu,James F. Scott,Joel W. Ager,Lane W. Martin,Ramamoorthy Ramesh,Ramamoorthy Ramesh +14 more
TL;DR: A fundamentally different mechanism for photovoltaic charge separation is reported, which operates over a distance of 1-2 nm and produces voltages that are significantly higher than the bandgap.
Journal ArticleDOI
Weak ferromagnetism and magnetoelectric coupling in bismuth ferrite
Claude Ederer,Nicola A. Spaldin +1 more
TL;DR: In this paper, the coupling between the ferroelectric and magnetic order parameters in the magnetoelectric multiferroic was analyzed using density functional theory within the local spin density approximation (LSDA) and the $\mathrm{LSDA}+\mathm{U}$ method.