Multiferroics

In collaboration with Prof. Ph. Ghosez (U. Liege) and Dr. J. Íñiguez (CSIC, Barcelona) we have investigated magnetic and ferroelectric (multiferroic) superlattices (SL) of perovskites oxides.  Using the most advanced ab initio techniques to treat non-collinear magnetism, we have demonstrated that ABO3/A’BO3 superlattices with a magnetic B atom exhibit hybrid improper ferroelectricity and weak ferromagnetism. We have shown that a change in polarization can switch the magnetization in (BiFeO3)1/(LaFeO3)1 SLs at room temperature [Phys. Rev. B 2013, 88, 060102(R)]. This is remarkable because most magnetoelectric effects are weak and visible only at very low temperature. Our result can be exploited in spintronic devices to build magnetically readable and electrically writable random access memories (M-RAM). Growth and characterization of SLs are performed by the groups of Prof. J.-M. Triscone and Prof. P. Paruch in Geneva.

Publications:

 

Structure of a BiFeO3/LaFeO3 1/1 superlattice epitaxially grown on (001)-SrTiO3. [Z. Zanolli, J. C. Wojdeł, J. Íñiguez, and Ph. Ghosez, Phys. Rev. B 88, 060102 (2013)]

Structure of a BiFeO3/LaFeO3 1/1 superlattice epitaxially grown on (001)-SrTiO3. [Phys. Rev. B 88, 060102 (2013)].
This figure has been selected as Phys Rev B Kaleidoscope image for the month of August 2013.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s