Enhancement in A-B super-exchange interaction with Mn substitution in Mg-Zn ferrites as a heating source in hyperthermia applications

Microstructural, magnetic, and hyperfine characterizations of Cu‐doped cobalt ferrite nanoparticles

“…The presence of canted surface spins also affects the magnetic properties of nanosized spinel ferrites. The calculated value of effective anisotropy constant ( K ) was found to decrease for higher Cu content ferrite samples and displayed in .…”

“…The presence of canted surface spins also affects the magnetic properties of nanosized spinel ferrites. The calculated value of effective anisotropy constant (K) was found to decrease for higher Cu content ferrite samples 17,30 and displayed in 3. The value of remanence ratio (r = M R /M S ) gradually decreases with increase in Cu concentration in cobalt ferrite at 5 K and room temperature.…”

“…16 The reduction in microstrain for higher copper content samples may be attributed to the increase in crystalline nature of samples with increasing size and slight migration of Cu ions to the tetrahedral sites as octahedral sites become Cu rich. The mean ionic radii (r A , r B ) per molecule of tetrahedral A-sites and octahedral B-sites can be calculated using following relations 17,18 where C and r are the respective fractional ion concentrations and cationic radii of A-sites and B-sites. The ionic radius of Fe 3+ (0.645 Å), Co 2+ (0.745 Å), and Cu 2+ (0.73 Å) ions were taken with possible cations distribution and the values of r A (Å), r B (Å) are listed in Table S1.…”

Magnetic clustering of Ni2+ ions in metal-ceramic nanocomposites obtained from Ni-exchanged zeolite precursors

“…In the last decade, the scientific interest towards magnetic nanostructured / nanocomposite materials has steadily increased owing to their functional properties associated with widespread applications ranging from electronics [1], magneto-optics and photocatalysis [2][3][4][5] to supercapacitors [6,7], hyperthermia [8], drug delivery [9,10], water remediation [11], energy harvesting [12]. Oxides of transition metals / rare earths have received particular attention because of the concurrence of magnetic effects and semiconducting-like properties [3,12,13] Magnetic metal-ceramic nanocomposites, consisting of a dispersion of Fe 0 , Co 0 , or Ni 0 nanoparticles into a prevailingly amorphous silica and alumina ceramic matrix, are an important sub-class of nanomaterials whose fields of application are typically associated with their porous structure, which makes them particularly suitable for use in environmental protection [14][15][16][17][18][19][20][21][22], catalysis [23][24][25][26][27][28] and biomedicine [29][30][31][32][33].…”

Vías de obtención de nanomateriales empleados para el tratamiento del cáncer por hipertermia magnética

“…Nanopartículas magnéticas (NPMs) de ferrita de zinc (Arteaga-Cardona et al, 2017) Nanopartículas de ferrita de níquel revestidas con polietilenglicol (PEG) (Iqbal, Bae, Rhee & Hong, 2016) Nanopartículas de maghemita (Múzquiz-Ramos, Guerrero-Chávez, Macías-Martínez, López-Badillo & García-Cerda, 2015) Nanopartículas de ferrita de Mn 2+ dopado Mg 0.5 Zn 0.5 -xMn x Fe 2 O 4 (x = 0, 0.125, 0.250, 0.375, 0.500) (Sharma et al, 2017) Nanopartículas de ferrita de cobalto (Yadavalli, Jain, Chandrasekharan & Chennakesavulu, 2016) Microemulsión Nanopartículas magnéticas recubiertas con ácido oleico (NPMsOA) cargadas con poli (metacrilato) (Feuser et al, 2015) Nanopartículas de sílice modificadas orgánicamente (ormosil) (Nagesetti & McGoron, 2016) Magnetita superparamagnética (Fe 3 O 4 ) (Ramesh, Ponnusamy & Muthamizhchelvan, 2011) Nanopartículas de perovskita a base de manganeso (Soleymani & Edrissi, 2016) Descomposición térmica Ferrofluído de Fe 3 O 4 funcionalizado con péptidos RGD (Arriortua et al, 2016) Nanocristales de óxido de hierro (Bear et al, 2014) Nanopartículas de ferrita de cobalto (Cotica et al, 2014) Nanopartículas de ferrita dispersables en agua superparamagnéticas (MFe 2 O 4 ) (Sabale, Jadhav & Yu, 2017) Nanopartículas de ferrita de níquel (Stefanou et al, 2014) Nanopartículas de magnetita (Fe 3 O 4 ) (Xiao et al, 2015) Sonoquímica Nanocompuestos magnéticos PET / Fe 3 O 4 , CA, AS (Mallakpour & Javadpour, 2018) Ferrofluido de hematita/magnetita (Zayed, Ahmed, Imam, & El Sherbiny, 2016a, 2016bZayed, Imam, Ahmed, & El Sherbiny, 2017) Técnica de Massart…”