Report
Spin-lattice coupling mediated giant magnetodielectricity across the spin reorientation in Ca2FeCoO5
| العنوان: | Spin-lattice coupling mediated giant magnetodielectricity across the spin reorientation in Ca2FeCoO5 |
|---|---|
| المؤلفون: | Sharma, Gaurav, Tyagi, Shekhar, Reddy, V. R., Awasthi, A. M., Choudhary, R. J., Sinha, A. K., Sathe, Vasant |
| المصدر: | Phys. Rev. B 99, 024436 (2019) |
| سنة النشر: | 2018 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science |
| الوصف: | The structural, phonon, magnetic, dielectric, and magneto dielectric responses of the pure bulk Brownmillerite compound Ca2FeCoO5 are reported. This compound showed giant magneto dielectric response (10%-24%) induced by strong spin-lattice coupling across its spin reorientation transition (150-250 K). The role of two Debye temperatures pertaining to differently coordinated sites in the dielectric relaxations is established. The positive giant magneto-dielectricity is shown to be a direct consequence of the modulations in the lattice degrees of freedom through applied external field across the spin reorientation transition. Our study illustrates novel control of magneto-dielectricity by tuning the spin reorientation transition in a material that possess strong spin lattice coupling. Comment: 7 pages, 12 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.99.024436 |
| URL الوصول: | http://arxiv.org/abs/1811.00404 |
| رقم الانضمام: | edsarx.1811.00404 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.99.024436 |
|---|