2012
DOI: 10.1016/j.jallcom.2012.07.098
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Particle size dependent magnetic properties and phase transitions in multiferroic BiFeO3 nano-particles

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Cited by 121 publications
(24 citation statements)
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“…A strong scientific interest has driven the fundamental research on magnetic nanoparticles in the last decades [14], with interest constantly fed by their wide range of potential applications, e.g., from catalysis [5] and microwaves applications [6] to biomedicine, such as MRI [7], hyperthermia [8], and drug delivery [7,9] applications. Nanometer-sized magnetic materials exhibit different properties compared their bulk counterparts [1011]. Below a critical radius, magnetic nanoparticles (NPs) organize themselves as a single magnetic domain, where all magnetic moments align in the same direction forming a “super spin” with a magnitude of 10 3 –10 4 Bohr magnetons [12].…”
Section: Introductionmentioning
confidence: 99%
“…A strong scientific interest has driven the fundamental research on magnetic nanoparticles in the last decades [14], with interest constantly fed by their wide range of potential applications, e.g., from catalysis [5] and microwaves applications [6] to biomedicine, such as MRI [7], hyperthermia [8], and drug delivery [7,9] applications. Nanometer-sized magnetic materials exhibit different properties compared their bulk counterparts [1011]. Below a critical radius, magnetic nanoparticles (NPs) organize themselves as a single magnetic domain, where all magnetic moments align in the same direction forming a “super spin” with a magnitude of 10 3 –10 4 Bohr magnetons [12].…”
Section: Introductionmentioning
confidence: 99%
“…The magnetic structure of BFO is of G-type antiferromagnetic order with Fe magnetic moments aligned ferromagnetically within pseudocubic (111) planes and antiferromagnetically between adjacent (111) planes. The combined action of exchange and spin-orbit interactions produces spin canting away from perfect antiferromagnetic ordering, resulting in a spiral spin arrangement with a wavelength of about 62 nm 710 . While with the decrease of particle size, surface effect usually leads to a breaking of the sublattice pairing in antiferromagnet and results in a net surface magnetic moment.…”
Section: Introductionmentioning
confidence: 99%
“…In nanoparticles with size L λ Bulk the ferromagnetic moment does not average out. Measured in several experiments, it was interpreted to arise from uncompensated antiferromagnetism [17][18][19][20][21][22][23]. Figure 3b shows the phase diagram for |M| in units of D /J for compensated samples.…”
Section: Ferromagnetism In Multiferroic Nanoparticlesmentioning
confidence: 99%
“…So far only a few studies have considered the impact of finite size on BFO's ferroelectric and magnetic properties. It was shown experimentally that BFO nanoparticles remain ferroelectric and antiferromagnetic at room temperature, but with decreased Curie and Néel transition temperatures, and enhanced ferromagnetism [17][18][19][20][21][22][23].…”
Section: Introductionmentioning
confidence: 99%