Round table discussion: Present and future applications of nanocrystalline magnetic materials

Herzer, G.; Vázquez, M.; Knobel, M.; Zhukov, А.; Reininger, Thomas; Davies, H.A.; Größinger, R.; Ll., J.L. Sánchez

doi:10.1016/j.jmmm.2005.03.042

Cited by 93 publications

(37 citation statements)

References 40 publications

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“…[12][13][14]. The physical properties of spinel ferrite such as electrical, magnetic and elastic properties are governed by the type of magnetic ions residing on the tetrahedral (A) and octahedral (B) sites in the crystal lattice [15][16][17][18] and the relative strength of the inter and intra sublattice interaction [19]. Ferrite-based materials have excellent chemical stability and are relatively cheap to produce.…”

Section: Introductionmentioning

confidence: 99%

Ion transport studies on Al–Zn ferrite dispersed nano-composite polymer electrolyte

et al. 2010

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A ferrite dispersed PEO based nano-composite polymer electrolyte has been developed in the present work. Formation of nano-composites, change in the structural and microscopic properties of the system have been investigated by X-ray diffraction, optical microscopy and SEM imaging. Existence of spinodal decomposition structure indicates formation of nano sized composite polymer electrolyte. Increase in formation of crystalline domain has been evidenced in thermal studies upon dispersal of nano-sized filler particles in pristine electrolyte matrix. The ionic transport studies through impedance spectroscopy exhibit highest electrical conductivity for the composition [93PEO-7NH 4 SCN]: 2 wt% Al-Zn ferrite, viz. is 1.22×10 −4 S/cm at room temperature with ionic transference number in excess of 0.9. Arrhenius type thermally activated conduction process is reflected during temperature dependent conductivity studies on these electrolytes.

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Section: Introductionmentioning

confidence: 99%

Ion transport studies on Al–Zn ferrite dispersed nano-composite polymer electrolyte

et al. 2010

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“…This so called cation distribution depends on the chemical composition, the method of preparation, and the cation distribution. In recent years, the design and synthesis of nano-magnetic particles have been the focus of fundamental and applied research owing to their enhanced or unusual properties (Herzer et al 2005). It is possible to manipulate the properties of a spinel material to meet the demands of a specific application.…”

Section: Introductionmentioning

confidence: 99%

Low temperature synthesis of nanosized Mn1−x Zn x Fe2O4 ferrites and their characterizations

2009

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Nanosized Mn 1-x Zn x Fe 2 O 4 (x = 0, 0⋅1, 0⋅3, 0⋅5, 0⋅6, 0⋅7, 0⋅9) mixed ferrite samples of particle size < 12 nm were prepared using the co-precipitation technique by doping the Zn 2+ ion impurities. Autoclave was employed to maintain constant temperature of 80 o C and a constant pressure. The X-ray analysis and the IR spectrum analysis were carried out to confirm the spinel phase formation as well as to ascertain the cation distribution in the ferrite samples. This clearly points to the fact that the Zn 2+ ion's presence is not restricted to A-site alone for some of the Mn-Zn ferrite series. The real part of a.c. susceptibility measurements clearly indicated the superparamagnetic behaviour of the ferrite samples. There is a systematic decrease in the particle size, Curie temperature and magnetization with the increase in the Zn 2+ ion doping, measured using magneto thermal gravimetric analysis (MTGA) and vibrating sample magnetometer (VSM), respectively. The lattice constant is found to be constantly decreasing till x = 0⋅6 and beyond this an unusual slight increase in the lattice constant is found.

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“…In recent years, the design and synthesis of nano-magnetic particles have been the focus of intense fundamental and applied research with special emphasis on their unusual or/and enhanced properties (Herzer et al 2005). In particular, spinel ferrite shows interesting magnetic properties in its nano-crystalline form compared to those of micron size bulk particles.…”

Section: Introductionmentioning

confidence: 99%

Bulk magnetic properties of CdFe2O4 in nano-regime

et al. 2007

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Cadmium ferrite particles have been synthesized using co-precipitation technique followed by a low temperature (600°C) annealing in a time scale much shorter than reported in literature. Incorporation of sodium chloride during annealing helps to form a single phase spinel structure with a final particle size of around 50 nm. Even at such a short length scale we observe the overall magnetic properties to be similar to those of the bulk. The observed magnetic properties can be explained on the basis of an anti-ferromagnetic core with a shell containing 'ferromagnetic-like', but canted spin structure.

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Round table discussion: Present and future applications of nanocrystalline magnetic materials

Cited by 93 publications

References 40 publications

Ion transport studies on Al–Zn ferrite dispersed nano-composite polymer electrolyte

Ion transport studies on Al–Zn ferrite dispersed nano-composite polymer electrolyte

Low temperature synthesis of nanosized Mn1−x Zn x Fe2O4 ferrites and their characterizations

Bulk magnetic properties of CdFe2O4 in nano-regime

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