Paper Title:
Magnetic Properties of Some Hydrated Transition Metal Oxide and Hydroxide Nanoparticles Synthesized in Different Media
  Abstract

Nanoscale particle size of metal oxides and hydroxides showed enhanced various physical properties and performance. We established a simple, cost-effective, room-temperature (RT) precipitation method for the preparation of the magnetic, first-raw transition metal (TM) hydrated oxide and hydroxide nanoparticles. This method is based on the use of the TM nitrate, as the metal source, and cyclohexylamine (CHA), as a precipitating agent, either in the water (H2O) or ethanol (EtOH) medium. We found that the precipitation medium and the identity of precipitated TM strongly affect the morphology, particle size, and magnetism of the product. The morphology varies from spherical, to rectangular, to rod shape; while the size varies in the range of 5-30 nm. All samples showed paramagnetic behavior with Curie temperatures span over a wide range (20-150K). Huge hysteresis looses has been observed for manganese (Mn) sample, prepared in H2O. The coercively (Hc) at 4.2K for this sample is about 1.5T, which is comparable to the strongest permanent magnets (Nd-based magnets) available at room temperature. The energy product (Hc*MR) is about 4.5*105 (emu/g)Oe.

  Info
Periodical
Advanced Materials Research (Volumes 123-125)
Edited by
Joong Hee Lee
Pages
727-730
DOI
10.4028/www.scientific.net/AMR.123-125.727
Citation
A. A. Bagabas, K. A. Ziq, A. F. Salem, E. S. Addurihem, "Magnetic Properties of Some Hydrated Transition Metal Oxide and Hydroxide Nanoparticles Synthesized in Different Media", Advanced Materials Research, Vols. 123-125, pp. 727-730, 2010
Online since
August 2010
Export
Price
$35.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Yuji Kondo, Shinobu Fujihara
Abstract:Tungsten trioxide (WO3) is known as a visible light responsive photocatalyst, but its photocatalytic activity is relatively low,...
283
Authors: Suchaya Sriudom, Hataichanoke Niamsup, Surin Saipanya, Ruangsri Watanesk, Surasak Watanesk
Chapter 1: Material Processing and Chemical Engineering
Abstract:Hydroxyapatite (HA) has been widely utilized in the biomedical applications due to its chemical and structural features that are similar to...
408
Authors: Qing Li Ren, Qiang Luo
Chapter 4: Materials and Technologies in Environmental Engineering and Chemical Production
Abstract:The magnesium hydroxide whiskers,its length being about 30μm and its diameter being about 3μm, was prepared by hydrothermal conditions. The...
350