Polarized neutron study of the magnetization density distribution within a CoFe2O4 colloidal particle II

Lin, Dongqing; Nunes, A. C.; Majkrzak, C. F.; Berkowitz, A. E.

doi:10.1016/0304-8853(94)01627-5

Cited by 171 publications

(104 citation statements)

References 11 publications

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“…2). Similar results have been reported for a number of magnetic fluids [12,14] and have been attributed to the existence of non-magnetic layer on the particle surface. Accord to ref.…”

Section: Magnetic Measurementsupporting

confidence: 88%

Initial susceptibility and viscosity properties of low concentration ε-Fe3N based magnetic fluid

Guo

et al. 2007

Nanoscale Res Lett

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In this paper, the initial susceptibility of e-Fe 3 N magnetic fluid at volume concentrations in the range F = 0.0~0.0446 are measured. Compared with the experimental initial susceptibility, the Langevin, Weiss and Onsager susceptibility were calculated using the data obtained from the low concentration e-Fe 3 N magnetic fluid samples. The viscosity of the e-Fe 3 N magnetic fluid at the same concentrations is measured. The result shows that, the initial susceptibility of the low concentration e-Fe 3 N magnetic fluid is proportional to the concentration. A linear relationship between relative viscosity and the volume fraction is observed when the concentration F < 0.02.

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“…2). Similar results have been reported for a number of magnetic fluids [12,14] and have been attributed to the existence of non-magnetic layer on the particle surface. Accord to ref.…”

Section: Magnetic Measurementsupporting

confidence: 88%

Initial susceptibility and viscosity properties of low concentration ε-Fe3N based magnetic fluid

Guo

et al. 2007

Nanoscale Res Lett

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“…In magnetic nanoparticles system, the surface spins may be frozen at low temperatures. [5][6][7]26,27 Similarly, the exchange interaction between the surface spins and core moments occurs, leading to the exchange bias field in Ni͑OH͒ 2 nanoparticles. Moreover, from XPS analysis in Fig.…”

Section: Resultsmentioning

confidence: 99%

Magnetic properties of nickel hydroxide nanoparticles

Liu

et al. 2010

Journal of Applied Physics

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The magnetic properties of 10 nm size Ni͑OH͒ 2 nanoparticles prepared by sol-gel method have been studied. The magnetic moments increase with decreasing temperature in a low applied field, which is due to the spin-frozen-like state at low temperatures, and the metamagnetic transition is not clearly observed even in an applied field of 70 kOe due to the size effect. Furthermore, the transition from paramagnetic to antiferromagnetic in the Ni͑OH͒ 2 nanoparticles occurs at lower temperature ͑22 K͒.

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“…It is an insulating and normal spinel compound [1][2][3][4][5] and has various catalytic activity such as water gas shift reaction, combustion of halogenated hydrocarbons, alkylation of phenol, dehydrogenation and hydrogenation [6][7][8][9][10][11]. It is also used as ceramic material, heat resistant pigment [12,13], substrate for epitaxial growths [14,15], high density magnetic memory media, etc [16][17][18]. Cobalt chromite have been synthesized by sonochemical route [19,20], coprecipitation technique and heating Co 2+ and Cr +3 ions with styrene maleic acid copolymer in DMF medium [21].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Cobalt Chromite Nanoparticles by Thermolysis of Mixed Cr3+ and Co2+ Chelates of 2-Mercaptopyridin N-Oxide

Edrissi

Keshavarz

2012

Nano-Micro Lett.

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Pure greenish-blue cobalt chromite (CoCr2O4) nanoparticles with narrow particle range of 4.1±1.9 nm and surface area of 78.2 m 2 ·g −1 were synthesized through mixed chelates thermolysis of corresponding metals using 2-Mercaptopyridine N-oxide sodium salt as chelating agent. During the thermolysis procedure, high amount of gases were emitted that led to the formation of nanoparticles with high surface area. The product was characterized by TGA, DTG, XRD, TEM, SEM, LLS, BET and chemical analysis. Design of experiments was performed to fulfill the two levels L4 Taguchi design. It was found that the temperature and time of thermolysis process have significant effect on the particle size reduction. The Oxidation of trichloroethylene was carried out over CoCr2O4 nanocrystallite. Catalytic activity analysis revealed that the synthesis CoCr2O4 possesses high catalytic activity for this process.

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Polarized neutron study of the magnetization density distribution within a CoFe2O4 colloidal particle II

Cited by 171 publications

References 11 publications

Initial susceptibility and viscosity properties of low concentration ε-Fe3N based magnetic fluid

Initial susceptibility and viscosity properties of low concentration ε-Fe3N based magnetic fluid

Magnetic properties of nickel hydroxide nanoparticles

Synthesis of Cobalt Chromite Nanoparticles by Thermolysis of Mixed Cr3+ and Co2+ Chelates of 2-Mercaptopyridin N-Oxide

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