NA J, LEE T, PARK S. Effects of cation distribution on magnetic properties in cobalt ferrite [J]. J Mater Sci Lett, 1993, 12(12): 961-962.
[2]
FERREIRA T, WAERENBORGH J, MENDONCA M, et al. Structural and morphological characterization of FeCo2O4 and CoFe2O4 spinels prepared by a coprecipitation method [J]. ChemInform, 2003, 34:31.
[3]
UZUNOVA E L, MITOV I G, KLISSURSKI D G. Synthesis of Nano-dimensional Iron-cobalt spinel mixed oxides from layered-type carbonate hydroxide precursors [J]. Bullet Chem Soci Jpn, 1997, 70(8): 1985-1993.
[4]
WASEDA Y, SHINODA K, SUGIYAMA K. Cation distribution of ZnFe2O4 and CoFe2O4 spinels from anomalous X-ray scattering [J]. Z Naturforsch A: Phys Sci, 1995, 50(12): 1199-1204.
[5]
CHANDRA K, SINGHAL S, GOYAL S. Magnetic and Mssbauer spectral studies of nano crystalline cobalt substituted magnesium ferrites (MgxCo1-xFe2O4) [J]. Hyperfine Interact, 2008, 183(1): 75-80.
[6]
HOU Y, ZHAO Y, LIU Z, et al. First-principles investigations of Zn(Cd) doping effects on the electronic structure and magnetic properties of CoFe2O4 [J]. J Appl Phys, 2011, 109:07A502.
[7]
JENG H-T, GUO G Y. First-principles investigations of the electronic structure and magnetocrystalline anisotropy in strained magnetite Fe3O4 [J]. Phys Rev B, 2002, 65(9): 094429.
[8]
JENG H T, GUO G, HUANG D. Charge-orbital ordering in low-temperature structures of magnetite: GGA+ Uinvestigations [J]. Phys Rev B, 2006, 74(19): 195115.
[9]
ANISIMOV V I, ZAANEN J, ANDERSEN O K. Band theory and Mott insulators: Hubbard U instead of Stoner I [J]. Phys Rev B, 1991, 44(3): 943.
[10]
PANDYA P, JOSHI H, KULKARNI R. Bulk magnetic properties of Co-Zn ferrites prepared by the co-precipitation method [J]. J Mater Sci Lett, 1991, 26(20): 5509-5512.
[11]
RAMANA REDDY A, RANGA MOHAN G, RAVINDER D, et al. High-frequency dielectric behaviour of polycrystalline zinc substituted cobalt ferrites [J]. J Mater Sci Lett, 1999, 34(13): 3169-3176.
[12]
BHOWMIK R, RANGANATHAN R, SARKAR S, et al. Magnetic enhancement of Co0.2Zn0.8 Fe2O4 spinel oxide by mechanical milling [J]. Phys Rev B, 2003, 68(13): 134433.
[13]
CHINNASAMY C, NARAYANASAMY A, PONPANDIAN N, et al. Mixed spinel structure in nanocrystalline NiFe2O4 [J]. Phys Rev B, 2001, 63(18): 184108.
[14]
MOYER J, VAZ C, ARENA D, et al. Magnetic structure of Fe-doped CoFe2O4 probed by x-ray magnetic spectroscopies [J]. Phys Rev B, 2011, 84(5): 054447.
[15]
SZOTEK Z, TEMMERMAN W, K DDERITZSCH D, et al. Electronic structures of normal and inverse spinel ferrites from first principles [J]. Phys Rev B, 2006, 74(17): 174431.
[16]
WALSH A, WEI S H, YAN Y, et al. Structural, magnetic, and electronic properties of the Co-Fe-Al oxide spinel system: Density-functional theory calculations [J]. Phys Rev B, 2007, 76(16): 165119.
[17]
FRANCO A, ZAPF V S. High temperature magnetic properties of Co1-xMgxFe2O4 nanoparticles prepared by forced hydrolysis method [J]. J Appl Phys, 2012, 111(7): 07B530.
[18]
HAMEDOUN M, BENYOUSSEF A, BOUSMINA M. Magnetic properties of magnetic Co1- xMgx Fe2O4 spinel by HTSE method [J]. Phys B: Condens Matter, 2011, 406(9): 1633-1638.
[19]
LI W, FA-SHEN L. Structural and magnetic properties of Co1-xZnxFe2O4 nanoparticles [J]. Chin Phys B, 2008, 17(5):1858.
[20]
SHEN X, XIANG J, SONG F, et al. Characterization and magnetic properties of electrospun Co1- xZnxFe2O4 nanofibers [J]. Phys B: Condens Matter, 2010, 99(1): 189-195.
[21]
Kambale R, Shaikh P, Harale N, et al. Structural and magnetic properties of Co1-xMnxFe2O4 (0<=x <=0.4) spinel ferrites synthesized by combustion route [J]. J Allo Comp, 2010, 490(1-2): 568-571.
[22]
QI X, WU D. Enhancement of the magnetostrictive properties of Co0.9Mn0.1Fe2O4 synthesized by using the precursor preparation technique [J]. J Magn Magn Mater, 2008, 320(5): 666-670.
[23]
AHMED M, EL-KHAWLANI A. Enhancement of the crystal size and magnetic properties of Mg-substituted Co ferrite [J]. J Magn Magn Mater, 2009, 321(13): 1959-1963.
[24]
AMMAR S, HELFEN A, JOUINI N, et al. Magnetic properties of ultrafine cobalt ferriteparticles synthesized by hydrolysis in a polyol medium [J]. J Mater Chem, 2001, 11(1): 186-192.
[25]
DUONG G V, TURTELLI R S, NUNES W, et al. Ultrafine Co1-xZnxFe2O4 particles synthesized by hydrolysis: Effect of thermal treatment and its relationship with magnetic properties [J]. J Non-Cryst Solids, 2007, 353:8-10.
[26]
BHAME S, JOY P. Magnetic and magnetostrictive properties of manganese substituted cobalt ferrite [J]. J Phys D: Appl Phys, 2007, 40:3263.
[27]
PERDEW J P, BURKE K, ERNZERHOF M. Generalized gradient approximation made simple [J]. Phys Rev Lett, 1996, 77(18): 3865-3868.
[28]
KRESSE G, JOUBERT D. From ultrasoft pseudopotentials to the projector augmented-wave method [J]. Phys Rev B, 1999, 59(3): 1758.
[29]
KRESSE G, FURTHM LLER J. Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set [J]. Comput Mater Sci, 1996, 6(1): 15-50.
[30]
KRESSE G, FURTHM LLER J. Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set [J]. Phys Rev B, 1996, 54(16): 11169.
[31]
LIECHTENSTEIN A, ANISIMOV V, ZAANEN J. Density-functional theory and strong interactions: Orbital ordering in Mott-Hubbard insulators [J]. Phys Rev B, 1995, 52(8): R5467. [22] DUDAREV S, BOTTON G, SAVRASOV S, et al. Electron-energy-loss spectra and the structural stability of nickel oxide: An LSDA+U study [J]. Phys Rev B, 1998, 57(3): 1505-1509.
