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Iron-containing phases in metallurgical and coke dusts as well as in bog iron ore

.1180/0026461026650054. 8. Thompson, R., & Oldfi eld, F. (1986). Environmental magnetism. London: Allen and Unwin. 9. Rzepa, G., Bajda, T., Gaweł, A., Debiec, K., & Drewniak, L. (2016). Mineral transformations and textural evolution during roasting of bog iron ores. J. Therm. Anal. Calorim., 123(1), 615-630. DOI: 10.1007/s10973-015-4925-1. 10. Dearing, J. A. (1994). Environmental magnetic susceptibility - using the Bartington MS2 System. Kenilworth, England: Chi Publishing. 11. Szumiata, T., Gawroński, M., Górka, B., Brzózka, K., Świetlik

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The Effect of Particle Concentration on the Heating Rate of Ferrofluids for Magnetic Hyperthermia

Abstract

The complex magnetic susceptibility χ(f) = χ′(f) - i χ″(f), of a ferrofluid sample with magnetite particles dispersed in kerosene and stabilized with oleic acid, over the range 0.1 GHz to 6 GHz, was determined. The initial sample has been successively diluted with kerosene (with a dilution rate of 2/3), thus obtaining further three samples. Using the complex magnetic susceptibility measurements of each sample, the frequency field and particle concentration dependencies of the heating rate of the ferrofluid samples, were analyzed. The results show the possibility of using the heating rate of ferrofluid samples with different particle concentrations, in hyperthermia applications.

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Features of the structural and magnetic properties of Pb(TixZr1–xO3)-NiFe1.98Co0.02O4 in the polarized state

Abstract

Composites with a 90%Pb(TixZr1-xO3)-10%NiFe1.98Co0.02O4 composition have been synthesized. It has been established that the polarization of samples resulting from exposure to an electric field for 1 hour of 4 kV/mm in strength at a temperature of 400 K leads to crystal structure deformation. The compression of elementary crystal cells in some areas during polarization of the sample creates conditions suitable for the enhancement of magnetic exchange interactions. It has been found that the polarization process of such compositions leads to increases in specific magnetization and magnetic susceptibility. The analysis of Mössbauer spectra has shown that the polarization of the 90%Pb(TixZr1-xO3)-10%NiFe1.98Co0.02O4 composite leads to significant changes in the effective magnetic fields of iron subspectra in various positions.

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Penetrative convection due to absorption of radiation in a magnetic nanofluid saturated porous layer

. The term M 0 and χ are the constant mean value of magnetization and tangent magnetic susceptibility respectively. The parameters χ and χ2 (chord magnetic susceptibility) can be estimated by using the Langevin parameter as α L = m H 0 k B T 0 = { □     1 ,         χ = M s m 3 k B T 0 ,   χ 2 = χ □     1 ,         χ = M s m k B T 0 L ′ ( α L ) ,   χ 2 = M s T

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Iron-containing phases in fly ashes from different combustion systems

., François, M., Abdelmoula, M., Refait, Ph., Pellissier, C., & Evrard, O. (1999). Characterization of magnetite in silico-aluminous fly ash by SEM, TEM, XRD, magnetic susceptibility, and Mössbauer spectroscopy. Cement. Concr. Res ., 29 , 1705–1711. DOI: 10.1016/S0008-8846(99)00133-7. 7. Javed, A., Szumiata, T., Morley, N. A., & Gibbs, M. R. J. (2010). An investigation of the effect of structural order on magnetostriction and magnetic behaviour of Fe-Ga thin films. Acta Mater ., 58 , 4003–4011. DOI: 10.1016/j.actamat.2010.03.023. 8. Szumiata, T., Górka, B., Brzózka

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Analysis of heat capacity and Mössbauer data for LuZnSn2 compound

., Kmieć, R., & Pacyna, A. W. J. (2001). Magnetic susceptibility and 119 Sn Mössbauer spectroscopy studies of RAuSn compounds (R=La, Ce, Pr). J. Magn. Magn. Mater ., 224 , 241–248. DOI: 10.1016/S0304-8853(01)00035-X. 12. Łątka, K., Kmieć, R., Kruk, R., Pacyna, A. W., Rams, M., Schmidt, T., & Pöttgen, R. (2003). Exotic phase transitions in RERhSn compounds. Nukleonika , 48 (Suppl. 1), 35–40. 13. Łątka, K., Kmieć, R., Kruk, R., Pacyna, A. W., Rams, M., Schmidt, T., Kotzyba, G., Pöttgen, R., & Johrendt, D. (2003). Structure and properties of CeRhSn – a valence

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Mössbauer and heat capacity studies of ErZnSn2

. Alloy. Compd., 319, 43-49. DOI: 10.1016/S0925-8388(01)00896-9. 11. Łątka, K., Chajec, W., Kmieć, R., & Pacyna, A. W. J. (2001). Magnetic susceptibility and 119Sn Mössbauer spectroscopy studies of RAuSn compounds (R=La, Ce, Pr). J. Magn. Magn. Mater., 224, 241-248. DOI: 10.1016/S0304-8853(01)00035-X. 12. Łątka, K., Kmieć, R., Kruk, R., Pacyna, A. W., Rams, M., Schmidt, T., & Pöttgen, R. (2003). Exotic phase transitions in RERhSn compounds. Nukleonika, 48(S1), S35-S40. 13. Łątka, K., Kmieć, R., Kruk, R., Pacyna, A. W

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Mössbauer spectroscopy of reduced forms of a Fe-tetraphenylporphyrine complex

. (1979). Paramagnetic anisotropy, average magnetic susceptibility, and electronic structure of intermediate-spin S = 1 (5,10,15,20-tetraphenylporphyrin)iron(II). Inorg. Chem ., 18 , 3585–3591. DOI: 10.1021/ic50202a059. 23. Zhan, C. G., Nichols, J. A., & Dixon, D. A. (2003). Ionization potential, electron affinity, electronegativity, hardness and electron excitation energy: Molecular properties from Density Functional Theory orbital energy. J. Phys. Chem. A , 107 , 4184–4195. DOI: 10.1021/jp0225774. 24. Khandelwal, S. C., & Roebber, J. L. (1975). The

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EMR-related problems at the interface between the crystal field Hamiltonians and the zero-field splitting Hamiltonians

., & Teslyuk, I. M. (2010). EPR spectroscopy of the Mn 2+ and Cu 2+ centres in lithium and potassium-lithium tetraborate glasses. Acta Phys. Pol. A , 117 , 122–125. 26. Singh, R. K., & Srinivasan, A. (2010). EPR and magnetic susceptibility studies of iron ions in ZnOFe 2 O 3 -SiO 2 -CaO-P 2 O 5 -Na 2 O glasses. J. Magn. Magn. Mater. , 322 , 2018–2022. 27. Antal, A., Janossy, A., Forro, L., Vertelman, E. J. M., van Koningsbruggen, P. J., & van Loosdrecht, P. H. M. (2010). Origin of the ESR spectrum in the Prussian blue analog RbMn[Fe(CN) 6 ]·H 2 O. Phys

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Elemental composition of surface soils in Nature Park Shumen Plateau and Shumen City, Bulgaria

.1016/0048-9697(95)04785-9 [8.] Djingova, R.; Wagner, G.; Kuleff, I., Screening of heavy metal pollution in Bulgaria using Populus nigra ‘Italica’, Sci Total Environ, 1999 , 234 :175-184. http://www.ncbi.nlm.nih.gov/pubmed/10507156 [9]. Cervi, E.C.; Saraiva da Costa, A.C.; Granemann de Souza Junior, I., Magnetic susceptibility and the spatial variability of heavy metals in soils developed on basalt, Journal of Applied Geophysics , 2014 , 111 :377-383. http://dx.doi.org/10.1016/j.jappgeo.2014.10.024 [10]. Citterio, S.; Aina, R.; Labra, M.; Ghiani, A.; Fumagalli, P

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