Defect driven ferroelectricity and magnetism in nanocrystalline KTaO3

Details Defect driven ferroelectricity and magnetism in nanocrystalline KTaO3 Defect driven ferroelectricity and magnetism in nanocrystalline KTaO3

2010-12-10

arxiv.org/abs/1012.2295v1

Physics

Condensed Matter

Materials Science

33 pages, 10 figures, 1 table, submitted to Physical Review B

Scientific paper

Nominally pure nanocrystalline KTaO3 was thoroughly investigated by micro-Raman and magnetic resonance spectroscopic techniques. In all samples the defect driven ferroelectricity and magnetism are registered. Both ordering states are suggested to appear due to the iron atoms and oxygen vacancies. The concentration of defects was estimated to be 0.04 and 0.06-0.1 mole %, respectively. Note that undoped single crystals of KTaO3 are nonmagnetic and have never exhibited ferromagnetic properties. The results enable us to refer a nanosized KTa(Fe)O3 to the class of multiferroics and assume that it could perform the magnetoelectric effect at T<29 K. It was also established that the critical concentration of impurity defects necessary to provoke the appearance of the new phase states in the material strongly correlates with the size of the particle; as the size of the particle decreases, the critical concentration decreases as well.

Affiliated with

Also associated with

No associations

Rating

Defect driven ferroelectricity and magnetism in nanocrystalline KTaO3 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Defect driven ferroelectricity and magnetism in nanocrystalline KTaO3, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Defect driven ferroelectricity and magnetism in nanocrystalline KTaO3 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-107994