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28 March 2024
 
  » arxiv » cond-mat/0103223

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Magnetic Phase Diagram of Ca2-xSrxRuO4 Governed by Structural Distortions
Zhong Fang ; Kiyoyuki Terakura ;
Date 10 Mar 2001
Journal Phys. Rev. B 64, 020509 (2001)
Subject Materials Science; Superconductivity | cond-mat.mtrl-sci cond-mat.supr-con
AbstractWe constructed, by the first-principles calculations, a magnetic phase diagram of Sr$_{2}$RuO$_4$ in the space spanned by structural distortions. Our phase diagram can qualitatively explain the experimental one for Ca$_{2-x}$Sr$_x$RuO$_4$. We found that the rotation and the tilting of RuO$_6$ octahedron are responsible for the ferro- and antiferro-magnetism, respectively, while the flattening of RuO$_6$ is the key factor to stabilize those magnetic ground states. Our results imply that the magnetic and the structural instabilities in Sr$_2$RuO$_4$ are closely correlated cooperatively rather than competitively.
Source arXiv, cond-mat/0103223
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