Anomalous magnetic behavior in Ni-Ag nanoparticles

Author

Roy, A. ; Ram, S. ; Srinivas, V. ; Rao, T. V Chandrasekhar

Author_Institution

Dept. of Phys., Indian Inst. of Technol., Kharagpur, India

fYear

2005

fDate

4-8 April 2005

Firstpage

1319

Lastpage

1320

Abstract

Ni fine particles are synthesized by a simple chemical reduction method. The particles obtained are strain-free and have spherical shape so that shape anisotropy is negligible. X-ray diffraction was used to study crystalline structure and the lattice parameters. It is concluded that the nanoparticles are an assembly of non-interacting particles whose moments get blocked with decreasing temperatures. A comparative study of air-annealed Ni (Ni_air) and silver-coated Ni (Ni_Ag) samples with different concentration provide a clear evidence of strong interparticle interactions for the samples prepared with higher molar concentration.

Keywords

X-ray diffraction; annealing; crystal structure; lattice constants; magnetic moments; magnetic particles; nanoparticles; nickel; reduction (chemical); silver; Ni-Ag; X-ray diffraction; air-annealed Ni; anomalous magnetic behavior; chemical reduction method; crystalline structure; fine particles; interparticle interactions; lattice parameters; molar concentration; nanoparticles; noninteracting particles; shape anisotropy; silver-coated Ni; spherical particles; strain-free particles; Anisotropic magnetoresistance; Assembly; Chemicals; Crystallization; Lattices; Magnetic anisotropy; Nanoparticles; Perpendicular magnetic anisotropy; Shape; X-ray diffraction;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International

Print_ISBN

0-7803-9009-1

Type

conf

DOI

10.1109/INTMAG.2005.1464089

Filename

1464089