Since the 1950's, magnetic materials have been used to store all kinds of information. The use of magnetic materials is ideal since they allow you to store information for very long periods of time and, moreover, information is easily accessible through well-known reading methods.
However, when storing sensitive information, easy access to information becomes a drawback rather than an advantage, and that's when hiding information becomes a necessity.
Following this idea, ICMAB researchers (I. Fina; C. Frontera; F. Sanchez & J. Fontcuberta), in collaboration with researchers from Berkeley Lab (CA, USA) and Germany, have published in the journal Scientific Reports an article that shows the ability of certain magnetic materials to hide information and reveal it under certain conditions and at room temperature.
In particular, if these magnetic materials are combined with suitable piezoelectric materials, the information hiding process can be done electrically, while the information writing and reading processes are not modified.
This extra level of security presented by these materials makes them suitable in high security devices and systems.
Read the whole article here: J. D. Clarkson, I. Fina, Z. Q. Liu, Y. Lee, J. Kim, C. Frontera, K. Cordero, S. Wisotzki, F. Sánchez, J. Sort, S. L. Hsu, C. Ko, L. Aballe, M. Foerster, J. Wu, H. M. Christen, J. T. Heron, D. G. Schlom, S. Salahuddin, N. Kioussis, J. Fontcuberta, X. Marti & R. Ramesh. Scientific Reports 7, Article number: 15460 (2017). DOI: 10.1038/s41598-017-13760-y