Magnetic Relaxation and Memory Effect in Nickel-Chromium Cyanide Nanoparticles
A. Zentko, V. Kavečanský, M. Mihalik, S. Maťaš, Z. Mitróová, M. Zentková
Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovak Republic
M. Maryško
Institute of Physics of the AS CR, v.v.i., Na Slovance 2, 182 21 Prague 8, Czech Republic
and Z. Jagličić
Institute of Mathematics, Physics and Mechanics, Jadranska 19, 1000 Ljubljana, Slovenia
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Received: 9 07 2007;
The low temperature dynamics of a magnetic nanoparticle system Ni3[Cr(CN)6]2 with an average nanoparticles size of 4 nm was studied. Using different temperature and field protocols memory phenomena were studied by the DC magnetization and magnetic relaxation measurements of the system at temperatures below Tm = 19 K. Aging experiments show an absence of any waiting time dependence in the magnetization relaxation due to a field change after zero field and field cooling. This observation discriminates the dynamics of the system from the behaviour of a classical spin-glass.
DOI: 10.12693/APhysPolA.113.511
PACS numbers: 75.50.Tt, 75.50.Lk