Magnetic coding in systems of nanomagnetic particles

S. Chakraverty, B. Ghosh, S. Kumar, A. Frydman

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


Nanomagnetic systems show exotic memory effects in the dc magnetization as a function of temperature. We present magnetization measurements on systems of nanomagnetic particles that show that such systems store the memory of either decrease or increase of magnetic field enabling a magnetic "coding" of "0"s and "1"s. Application of a field larger than a critical field, H* erases the memory effects. We show that this behavior can be explained by a wide distribution of grain sizes having different blocking temperatures. The effect can be used as a tool for measuring spacial and temporal magnetization changes of a magnetic surface.

Original languageEnglish
Article number042501
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Issue number4
StatePublished - 2006

Bibliographical note

Funding Information:
The authors gratefully acknowledge useful discussions with S. Sen. This research was supported by the Israel Science Foundation (Grant No. 249/05).


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