NiO core–shell nanostructure with ferromagnetic-like behavior at room temperature

Magnetic properties of NiO (nickel oxide) nanoparticles: Blocking temperature and Neel temperature

“…A C C E P T E D ACCEPTED MANUSCRIPT 3 Varying the particle size of NiO leads to novel and interesting magnetic properties that range from nanosized to bulk-like behavior [4,8,13,14,. Moreover, there is growing interest for the use of NiO nanoparticles in applications and devices.…”

Studies on cobalt doped NiO nanoparticles prepared by simple chemical method

“…Nanocrystalline NiO is an important material used in high technological application like smart windows, electrochemical super capacitors and also in dye sensitized photo cathode [4][5][6][7][8][9]. NiO nanoparticles have been prepared by different researchers using various methods such as sol-gel method [10], solvothermal method [11], hydrothermal method [12], chemical method [13], sonochemical method [14], anodic plasma technique [15], microemulsion method [16], and thermal decomposition method [17]. Among these techniques, the chemical method is a simple method in which the size can be easily controlled and has been used in the present study to synthesise the NiO nanoparticles and cobalt doped NiO nanoparticles.…”

Annealing-dependent structural and magnetic properties of nickel oxide (NiO) nanoparticles in a silica matrix

“…Interest in the magnetic properties of nanosized NiO has recently been revived due to reports of interesting and complex magnetic behavior [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Although bulk NiO is antiferromagnetic, nanoparticles exhibit room-temperature coercivity, spin-glass behavior, superparamagnetism, memory effects, exchange bias effects and magnetic transitions at low temperature [17][18][19][20][21][22][23][24][25][26][27][28][29].…”

“…Although bulk NiO is antiferromagnetic, nanoparticles exhibit room-temperature coercivity, spin-glass behavior, superparamagnetism, memory effects, exchange bias effects and magnetic transitions at low temperature [17][18][19][20][21][22][23][24][25][26][27][28][29]. The novel magnetic properties of NiO nanoparticles compared to bulk material are mainly due to a complex interplay between finite size effects, surface effects and inter-particle interactions [4,6,16,22,24,27,28]. Finite size effects are related to the reduced number of exchange-coupled spins within nanoparticles, whereas surface effects are related to the reduced symmetry of surface atoms.…”