Magnetic properties of nanosized Mg0.5Mn0.5(RE)0.1Fe1.9O4 ferrites synthesized by glycol–thermal method

Electronic and Simple Oscillatory Conduction in Ferrite Gas Sensors: Gas-Sensing Mechanisms, Long-Term Gas Monitoring, Heat Transfer, and Other Anomalies

“…The patterns show single phase formation with all peaks indexed to the cubic normal and inverse spinel structure of AB 2 O 4 with Fd 3̅ m space group (JCPDS card no. 36-0398 and 22-1086, respectively). ,, The fact that these peaks are broad indicates nanosized particle sizes. No additional or secondary phases were observed.…”

“…36-0398 and 22-1086, respectively). 18,19,24 The fact that these peaks are broad indicates nanosized particle sizes. No additional or secondary phases were observed.…”

“…These are in t h e s a m e r a n g e a s t h e r a r e -e a r t h -d o p e d Mg 0.5 Mn 0.5 (RE) 0.1 Fe 1.9 O 4 reported between 9 and 15 nm. 18 It is clear that the crystallite sizes and surface areas increase with the incorporation of the rare earth Ce in the octahedral site (B) and substitution of Mg or Co in the A-site (tetrahedral). It should be noted that the A-site has the Mg or Co.…”

“…There is also a trend to investigate materials in the form of AB 2 O 4 , ABO 3 , and ABO 4 for gas sensing. These types of semiconducting materials present new opportunities in the gas-sensing field. − Normally, the A-site is the tetrahedral position, and the B-site is the octahedral position. − They can be prepared by any facile process, for example, high pressure hydrothermal synthesis, by mixing metal chloride or nitrate salts in the correct stoichiometric ratio with a precipitating agent such as ammonia. Spinel crystal structures assume different charges in the A- and B-sites.…”

Characteristics of the mechanical milling on the room temperature ferromagnetism and sensing properties of TiO2 nanoparticles

“…Moreover, the origin of ferromagnetism for TiO 2 NPs diluted magnetic semiconductors can be explained by various carrier mediated mechanisms that include double-exchange, super-exchange or Ruderman-Kittel-Kasuya-Yosida (RKKY) exchange interactions [43]. Experimental magnetic moment per molecular unit ( ) in Bohr magneton was calculated using the relation = M w M S /5585 where M w is the molar mass [47].…”