Bibliographic Details
| Title: |
Magnetoelectric Properties of (Ca$_{1-x}$Sr$_{x}$)$_2$CoSi$_2$O$_7$ Crystals |
| Authors: |
Akaki, M., Tozawa, J., Hitomi, M., Akahoshi, D., Kuwahara, H. |
| Source: |
J. Phys.: Conf. Ser. 200 (2010) 012003 |
| Publication Year: |
2009 |
| Collection: |
Condensed Matter |
| Subject Terms: |
Condensed Matter - Strongly Correlated Electrons |
| More Details: |
We have investigated the magnetoelectric properties of (Ca$_{1-x}$Sr$_{x}$)$_2$CoSi$_2$O$_7$ ($0\leq x\leq 1$) crystals with a quasi-two-dimensional structure. In Ca$_2$CoSi$_2$O$_7$ ($x=0$), a canted antiferromagnetic transition occurs at 5.6 K. The transition temperature $T_{\rm N}$ is increasing with increasing Sr concentration, and the rises of the magnetization and dielectric constant become larger. Since the dielectric constant shows large change at $T_{\rm N}$ and the magnetocapacitance effect is observed below $T_{\rm N}$, a coupling between the magnetism and dielectricity is strong in (Ca$_{1-x}$Sr$_{x}$)$_2$CoSi$_2$O$_7$. The positive magnetocapacitance is reduced by Sr substitution, and is not observed in $x\geq 0.5$. Namely, the compound of $x\geq 0.5$ does not show the magnetic-field-induced electric polarization. On the other hand, the negative magnetocapacitance is enhanced by Sr substitution.
Comment: 4 pages, 2figures, proceeding of International Conference on Magnetism 2009 |
| Document Type: |
Working Paper |
| DOI: |
10.1088/1742-6596/200/1/012003 |
| Access URL: |
http://arxiv.org/abs/0909.1159 |
| Accession Number: |
edsarx.0909.1159 |
| Database: |
arXiv |
