Ten layered hexagonal perovskite Sr5Ru5-xO 15 (x = 0.90), a weak ferromagnet with a giant coercive field H c ∼ 12 T

Ayako Yamamoto, Daisuke Hashizume, Hiroko Aruga Katori, Takahiko Sasaki, Eiji Ohmichi, Terukazu Nishizaki, Norio Kobayashi, Hidenori Takagi

研究成果: Article

6 引用 (Scopus)

抄録

A single crystal of Sr5Ru5-xO15 (x = 0.90(2)) with mixed valence of Ru(IV) and Ru(V) was synthesized under a high pressure of 4 GPa with an oxidizer. Sr5Ru5-xO15 crystallizes in a hexagonal perovskite-type structure with a space group P63/mmc (No.194), a = 5.5600(11) Å, and c = 22.830(5) Å. An alternative stacking of four corner-sharing (c) SrO3 layers and one face-sharing (h) SrO3 layer linking RuO6 octahedra and its doubling along c-axis gives a 10 layer period hexagonal cell (10H) which is denoted by (cccch)2. The partial deficiency of Ru found in face-sharing octahedra, as reported for 8H-Sr4Ru4-xO 12 (x = 0.95) with (ccch)2 stacking, yields an average Ru valence estimate of 4.87. The bond valence analysis indicates that the valence of Ru in fully corner-sharing octahedra is nearly 5, while that of Ru in face-sharing octahedra is considerably lower than 5. This compound is a weakly ferromagnetic metal with Curie temperature Tc = 160 K and a saturated moment of 0.07 and 0.05 μB/Ru in H ⊥ c and H // c, respectively. In the ferromagnetic state, we found remarkable enhancement of the coercivity below 50 K. At 1.7 K, a giant coercive field of ∼12 T was observed. We argue that Ru(IV,V) in face-sharing layers are responsible for the ferromagnetism and that possible glassy character due to frustration and disorder may at least in part contribute to the giant coercivity.

元の言語English
ページ(範囲)5712-5717
ページ数6
ジャーナルChemistry of Materials
22
発行部数20
DOI
出版物ステータスPublished - 2010 10 26
外部発表Yes

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Coercive force
Perovskite
Ferromagnetic materials
Ferromagnetism
Curie temperature
Single crystals
perovskite

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemical Engineering(all)
  • Chemistry(all)

これを引用

Ten layered hexagonal perovskite Sr5Ru5-xO 15 (x = 0.90), a weak ferromagnet with a giant coercive field H c ∼ 12 T. / Yamamoto, Ayako; Hashizume, Daisuke; Katori, Hiroko Aruga; Sasaki, Takahiko; Ohmichi, Eiji; Nishizaki, Terukazu; Kobayashi, Norio; Takagi, Hidenori.

:: Chemistry of Materials, 巻 22, 番号 20, 26.10.2010, p. 5712-5717.

研究成果: Article

Yamamoto, A, Hashizume, D, Katori, HA, Sasaki, T, Ohmichi, E, Nishizaki, T, Kobayashi, N & Takagi, H 2010, 'Ten layered hexagonal perovskite Sr5Ru5-xO 15 (x = 0.90), a weak ferromagnet with a giant coercive field H c ∼ 12 T', Chemistry of Materials, 巻. 22, 番号 20, pp. 5712-5717. https://doi.org/10.1021/cm1017954
Yamamoto, Ayako ; Hashizume, Daisuke ; Katori, Hiroko Aruga ; Sasaki, Takahiko ; Ohmichi, Eiji ; Nishizaki, Terukazu ; Kobayashi, Norio ; Takagi, Hidenori. / Ten layered hexagonal perovskite Sr5Ru5-xO 15 (x = 0.90), a weak ferromagnet with a giant coercive field H c ∼ 12 T. :: Chemistry of Materials. 2010 ; 巻 22, 番号 20. pp. 5712-5717.
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abstract = "A single crystal of Sr5Ru5-xO15 (x = 0.90(2)) with mixed valence of Ru(IV) and Ru(V) was synthesized under a high pressure of 4 GPa with an oxidizer. Sr5Ru5-xO15 crystallizes in a hexagonal perovskite-type structure with a space group P63/mmc (No.194), a = 5.5600(11) {\AA}, and c = 22.830(5) {\AA}. An alternative stacking of four corner-sharing (c) SrO3 layers and one face-sharing (h) SrO3 layer linking RuO6 octahedra and its doubling along c-axis gives a 10 layer period hexagonal cell (10H) which is denoted by (cccch)2. The partial deficiency of Ru found in face-sharing octahedra, as reported for 8H-Sr4Ru4-xO 12 (x = 0.95) with (ccch)2 stacking, yields an average Ru valence estimate of 4.87. The bond valence analysis indicates that the valence of Ru in fully corner-sharing octahedra is nearly 5, while that of Ru in face-sharing octahedra is considerably lower than 5. This compound is a weakly ferromagnetic metal with Curie temperature Tc = 160 K and a saturated moment of 0.07 and 0.05 μB/Ru in H ⊥ c and H // c, respectively. In the ferromagnetic state, we found remarkable enhancement of the coercivity below 50 K. At 1.7 K, a giant coercive field of ∼12 T was observed. We argue that Ru(IV,V) in face-sharing layers are responsible for the ferromagnetism and that possible glassy character due to frustration and disorder may at least in part contribute to the giant coercivity.",
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T1 - Ten layered hexagonal perovskite Sr5Ru5-xO 15 (x = 0.90), a weak ferromagnet with a giant coercive field H c ∼ 12 T

AU - Yamamoto, Ayako

AU - Hashizume, Daisuke

AU - Katori, Hiroko Aruga

AU - Sasaki, Takahiko

AU - Ohmichi, Eiji

AU - Nishizaki, Terukazu

AU - Kobayashi, Norio

AU - Takagi, Hidenori

PY - 2010/10/26

Y1 - 2010/10/26

N2 - A single crystal of Sr5Ru5-xO15 (x = 0.90(2)) with mixed valence of Ru(IV) and Ru(V) was synthesized under a high pressure of 4 GPa with an oxidizer. Sr5Ru5-xO15 crystallizes in a hexagonal perovskite-type structure with a space group P63/mmc (No.194), a = 5.5600(11) Å, and c = 22.830(5) Å. An alternative stacking of four corner-sharing (c) SrO3 layers and one face-sharing (h) SrO3 layer linking RuO6 octahedra and its doubling along c-axis gives a 10 layer period hexagonal cell (10H) which is denoted by (cccch)2. The partial deficiency of Ru found in face-sharing octahedra, as reported for 8H-Sr4Ru4-xO 12 (x = 0.95) with (ccch)2 stacking, yields an average Ru valence estimate of 4.87. The bond valence analysis indicates that the valence of Ru in fully corner-sharing octahedra is nearly 5, while that of Ru in face-sharing octahedra is considerably lower than 5. This compound is a weakly ferromagnetic metal with Curie temperature Tc = 160 K and a saturated moment of 0.07 and 0.05 μB/Ru in H ⊥ c and H // c, respectively. In the ferromagnetic state, we found remarkable enhancement of the coercivity below 50 K. At 1.7 K, a giant coercive field of ∼12 T was observed. We argue that Ru(IV,V) in face-sharing layers are responsible for the ferromagnetism and that possible glassy character due to frustration and disorder may at least in part contribute to the giant coercivity.

AB - A single crystal of Sr5Ru5-xO15 (x = 0.90(2)) with mixed valence of Ru(IV) and Ru(V) was synthesized under a high pressure of 4 GPa with an oxidizer. Sr5Ru5-xO15 crystallizes in a hexagonal perovskite-type structure with a space group P63/mmc (No.194), a = 5.5600(11) Å, and c = 22.830(5) Å. An alternative stacking of four corner-sharing (c) SrO3 layers and one face-sharing (h) SrO3 layer linking RuO6 octahedra and its doubling along c-axis gives a 10 layer period hexagonal cell (10H) which is denoted by (cccch)2. The partial deficiency of Ru found in face-sharing octahedra, as reported for 8H-Sr4Ru4-xO 12 (x = 0.95) with (ccch)2 stacking, yields an average Ru valence estimate of 4.87. The bond valence analysis indicates that the valence of Ru in fully corner-sharing octahedra is nearly 5, while that of Ru in face-sharing octahedra is considerably lower than 5. This compound is a weakly ferromagnetic metal with Curie temperature Tc = 160 K and a saturated moment of 0.07 and 0.05 μB/Ru in H ⊥ c and H // c, respectively. In the ferromagnetic state, we found remarkable enhancement of the coercivity below 50 K. At 1.7 K, a giant coercive field of ∼12 T was observed. We argue that Ru(IV,V) in face-sharing layers are responsible for the ferromagnetism and that possible glassy character due to frustration and disorder may at least in part contribute to the giant coercivity.

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