Temperature and composition phase diagram in the iron-based ladder compounds Ba1-xCsxFe2Se3
| Autor: | Hawai, Takafumi, Nambu, Yusuke, Ohgushi, Kenya, Du, Fei, Hirata, Yasuyuki, Avdeev, Maxim, Uwatoko, Yoshiya, Sekine, Yurina, Fukazawa, Hiroshi, Ma, Jie, Chi, Songxue, Ueda, Yutaka, Yoshizawa, Hideki, Sato, Taku J. |
|---|---|
| Rok vydání: | 2015 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | We investigated the iron-based ladder compounds (Ba,Cs)Fe$_2$Se$_3$. Their parent compounds, BaFe$_2$Se$_3$ and CsFe$_2$Se$_3$, have different space groups, formal valences of Fe and magnetic structures. Electrical resistivity, specific heat, magnetic susceptibility, X-ray diffraction and powder neutron diffraction measurements were conducted to obtain temperature and composition phase diagram of this system. Block magnetism observed in BaFe$_2$Se$_3$ is drastically suppressed with Cs doping. In contrast, stripe magnetism observed in CsFe$_2$Se$_3$ is not so fragile against Ba doping. New type of magnetic structure appears in intermediate compositions, which is similar to stripe magnetism of CsFe$_2$Se$_3$, but inter-ladder spin configuration is different. Intermediate compounds show insulating behavior, nevertheless finite $T$-linear contribution in specific heat was obtained at low temperatures. Comment: 12 pages, 13 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|