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Journal Article

Magnetic glassy phase in Zn0.85Fe0.15O diluted magnetic semiconducting nanoparticles

MPS-Authors
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Das,  A.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;

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Kremer,  R. K.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Mandal, S. K., Nath, T. K., Das, A., & Kremer, R. K. (2006). Magnetic glassy phase in Zn0.85Fe0.15O diluted magnetic semiconducting nanoparticles. Applied Physics Letters, 89(16): 162502.


Cite as: https://hdl.handle.net/21.11116/0000-000E-FB25-E
Abstract
The authors have investigated the ground state magnetic phase and the
optical band gap of chemically synthesized Zn0.85Fe0.15O diluted
magnetic semiconducting nanoparticles (similar to 7.5 nm). The
temperature dependent magnetization study shows strong irreversibility
along with a cusplike anomaly, which is ascribed to a freezing to a
cluster glasslike magnetic ground state. This assignment is further
established by Arrott-Belov-Kouvel plots along with S-like
nonsaturating magnetization versus field curves. The finite size
ferromagnetic clusters which are formed due to an enhanced grain
surface effect in the system undergo random dipolar intercluster
interactions, giving rise to strong competitive ferromagnetic and
antiferromagnetic interactions, finally leading to the freezing of
those clusters.