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ChemInform Abstract: Magnetic Properties of 8H-Type Hexagonal Ba(Na1/4Ru3/4)O3.

✍ Scribed by I.-S. KIM; T. NAKAMURA; M. ITOH

Publisher
John Wiley and Sons
Year
2010
Weight
39 KB
Volume
29
Category
Article
ISSN
0931-7597

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✦ Synopsis

1998 dielectric properties, magnetic properties dielectric properties, magnetic properties D 9000

46 -015

Magnetic Properties of 8H-Type Hexagonal Ba(Na 1/4 Ru 3/4 )O 3 .

-The title compound, having a two-dimensional (2D) geometry of Ru 5+ (t 3 2g ) ions, contains face-sharing Ru 2 O 9 8-double octahedra in a 2D arrangement which are sandwiched by 2D layers of NaO 6 and RuO 6 corner-linked octahedra. Magnetic measurements show an antiferromagnetism-like behavior and can be well fitted to the Curie-Weiss law above 520 K with Β΅ ef f = 3.74 Β΅ B and ΞΈ = -1330 K. At lower temp. these values are Β΅ ef f = 2.32 Β΅ B and ΞΈ = -221 K . The susceptibility data exhibit a strong external field dependence below 262 K, and magnetic anomaly peaks can be observed in low-field FC data at 30, 110, and 180 K, respectively. A spin-glass transition in Ba(Na 1/4 Ru 3/4 )O 3 is strongly suggested. -(KIM, I.

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