Preparation and properties of temperature-sensitive magnetic fluid having Co0.5Zn0.5Fe2O4 and Mn0.5Zn0.5Fe2O4 nanoparticles

Arulmurugan, R.; Vaidyanathan, G.; Sendhilnathan, S.; Jeyadevan, Balachandran

doi:10.1016/j.physb.2005.07.028

Cited by 25 publications

(13 citation statements)

References 13 publications

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“…A value within our range was also reported for Mn-Zn ferrite NPs prepared by hydrothermal synthesis (180 C) in which a maximum magnetization intensity was observed for a Mn:Zn = 0.66. This is in direct contrast to the results reported for Mn-Zn ferrite NPs prepared by precipitation [26,27,34]. In that case, there was a distinct maximum at Mn:Zn = 4.…”

Section: Magnetic Measurements Of Mn-zn Ferrite Npscontrasting

confidence: 99%

“…As shown in Figure 1, there was no significant trend or change in NP size (as determined by SAXS) as a function of Mn:Zn ratio [32]. This is unlike the observation of NPs prepared using co-precipitation [26,27,34]. In addition, the present NPs are smaller (and show a narrower size distribution) than those prepared by hydrothermal methods [28].…”

Section: Magnetic Measurements Of Mn-zn Ferrite Npsmentioning

confidence: 57%

“…As with our prior work and that of others [26,27,29,34] the iron precursor concentration was maintained constant, while the relative amounts of the Mn and Zn precursors [Mn(acac) 2 and Zn(acac) 2 , respectively] were varied. Samples were prepared with nominal reagent composition of Mn x Zn 1¡x Fe 2 O 4 and the Mn:Zn ratio was determined by ICP-OES [32].…”

Section: Magnetic Measurements Of Mn-zn Ferrite Npsmentioning

confidence: 99%

“…Superparamagnetic Mn-Zn ferrite (Mn x Zn 1¡x Fe 2 O 4 ) NPs have been shown to have a high magnetic susceptibility [22], and their use in ferrofluids has been demonstrated [23]. Prior synthetic strategies have included co-precipitation [24][25][26][27], hydrothermal processing [28,29], and sol-gel [30]. NPs produced by hydrothermal synthesis show a broad particle size distribution (4-18 nm) [29], while those prepared by co-precipitation show a dependence on the composition and particle size, but also appear highly agglomerated.…”

Section: Introductionmentioning

confidence: 99%

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Temperature dependence on the mass susceptibility and mass magnetization of superparamagnetic Mn–Zn–ferrite nanoparticles as contrast agents for magnetic imaging of oil and gas reservoirs

Morrow

Snow

Ali

et al. 2018

Journal of Experimental Nanoscience

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(2018) Temperature dependence on the mass susceptibility and mass magnetization of superparamagnetic Mn-Zn-ferrite nanoparticles as contrast agents for magnetic imaging of oil and gas reservoirs, Journal of Experimental Nanoscience ABSTRACTThe mass susceptibility (x mass ) and mass magnetization (M mass ) were determined for a series of ternary manganese and zinc ferrite nanoparticles (Mn-Zn ferrite NPs, Mn x Zn 1¡x Fe 2 O 4 ) with different Mn:Zn ratios (0.08 x 4.67), prepared by the thermal decomposition reaction of the appropriate metal acetylacetonate complexes, and for the binary homologs (M x Fe 3¡x O 4 , where M = Mn or Zn). Alteration of the Mn:Zn ratio in Mn-Zn ferrite NPs does not significantly affect the particle size. At room temperature and low applied field strength the mass susceptibility increases sharply as the Mn:Zn ratio increases, but above a ratio of 0.4 further increase in the amount of manganese results in the mass susceptibility decreasing slightly, reaching a plateau above Mn:Zn % 2. The compositional dependence of the mass magnetization shows less of a variation at room temperature and high applied fields. The temperature dependence of the mass magnetization of Mn-Zn ferrite NPs is significantly less for Mn-rich compositions making them more suitable for downhole imaging at higher temperatures (>100 C). For non-shale reservoirs, replacement of nMag by Mnrich Mn-Zn ferrites will allow for significant signal-to-noise enhancement of 6.5£ over NP magnetite.

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Section: Magnetic Measurements Of Mn-zn Ferrite Npscontrasting

confidence: 99%

Section: Magnetic Measurements Of Mn-zn Ferrite Npsmentioning

confidence: 57%

Section: Magnetic Measurements Of Mn-zn Ferrite Npsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Temperature dependence on the mass susceptibility and mass magnetization of superparamagnetic Mn–Zn–ferrite nanoparticles as contrast agents for magnetic imaging of oil and gas reservoirs

Morrow

Snow

Ali

et al. 2018

Journal of Experimental Nanoscience

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show abstract

“…Among different magnetic materials, Zn-substituted spinel ferrites are attractive because Zn substitution alters their properties in a relatively wide range [4]. For example, MnZn ferrites are technologically important materials because of their high magnetic permeability and low core losses.…”

Section: Introductionmentioning

confidence: 99%