Mukadam, M. D. ; Yusuf, S. M. ; Sasikala, R. ; Kulshreshtha, S. K. (2006) Study of superparamagnetic clusters in Co2+-exchanged NaY zeolite Journal of Applied Physics, 99 (3). Article ID 034310. ISSN 0021-8979
Full text not available from this repository.
Official URL: http://aip.scitation.org/doi/10.1063/1.2168292
Related URL: http://dx.doi.org/10.1063/1.2168292
Abstract
Magnetic properties of Co2+-exchanged NaY zeolite have been investigated using a dc magnetization technique. In the presence of low applied magnetic fields, a difference between zero-field-cooled and field-cooled magnetizations is observed below ∼3.4K. At T > 5 K, the M vs H∕T curves superimpose and these curves could be fitted well using the Langevin function, which yields a saturation moment of 3.2μB per Co2+ ion and a cluster moment of 6.66μB. This indicates that there are superparamagnetic clusters which are formed due to a positive exchange coupling among the Co2+ ions. For T < 5 K, the M vs H∕T curves do not superimpose on the curves for T > 5 K. The analysis of the low-temperature M vs H data suggests the building up of weak antiferromagnetic-type correlation between the superparamagnetic clusters at T < 5 K.
Item Type: | Article |
---|---|
Source: | Copyright of this article belongs to American Institute of Physics. |
ID Code: | 112362 |
Deposited On: | 01 Dec 2017 11:46 |
Last Modified: | 01 Dec 2017 11:46 |
Repository Staff Only: item control page