Ferromagnetic state with large magnetic moments realized in epitaxially strained Sr3Ru2O7 films
| Autor: | Oshima, Ren, Hatanaka, Tatsuto, Nishihaya, Shinichi, Nomoto, Takuya, Kriener, Markus, Fujita, Takahiro C., Kawasaki, Masashi, Arita, Ryotaro, Uchida, Masaki |
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| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Physical Review B 109, L121113 (2024) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.109.L121113 |
| Popis: | Technical advancement of oxide molecular beam epitaxy (MBE) has opened new avenues for studying various quantum transport phenomena in correlated transition-metal oxides, as exemplified by the exotic superconductivity of Sr$_2$RuO$_4$ and quantum oscillations of SrRuO$_3$. On the other hand, film research of another Ruddlesden-Popper strontium ruthenate Sr$_3$Ru$_2$O$_7$ which exhibits a unique quantum phase related to metamagnetism in bulk systems did not progress well. Here we report the fabrication of high-quality Sr$_3$Ru$_2$O$_7$ thin films by oxide MBE and the observation of a strain-induced ferromagnetic ground state. The change in magnetic exchange coupling evaluated by first-principles calculations indicates a systematic relation between the compression of the $c$-axis length and induced ferromagnetism. Giant epitaxial strain in high-quality films will be a key to a comprehensive understanding of the magnetism in Ruddlesden-Popper strontium ruthenates Sr$_{n+1}$Ru$_n$O$_{3n+1}$, which sensitively depends on the ratio of in-plane to out-of-plane Ru-Ru distances. Comment: 15 pages, 4 figures |
| Databáze: | arXiv |
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