Two-dimensional tetramer-cuprate Na5RbCu4(AsO4)4Cl2: phase transitions and AFM order as seen by Rb-87 NMR

Stern, Raivo; Heinmaa, Ivo; Kriisa, Annika; Joon, Enno; Vija, Sirje; Clayhold, J.; Ulutagay-Kartin, M.; Mo, X.; Queen, W.; Hwu, S.-J (2006). Two-dimensional tetramer-cuprate Na5RbCu4(AsO4)4Cl2: phase transitions and AFM order as seen by 87Rb NMR. Physica B: Condensed Matter, 378-80, 1124−1125.10.1016/j.physb.2006.01.523.
ajakirjaartikkel
Stern, Raivo; Heinmaa, Ivo; Kriisa, Annika; Joon, Enno; Vija, Sirje; Clayhold, J.; Ulutagay-Kartin, M.; Mo, X.; Queen, W.; Hwu, S.-J
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Two-dimensional tetramer-cuprate Na5RbCu4(AsO4)4Cl2: phase transitions and AFM order as seen by Rb-87 NMR
Two-dimensional tetramer-cuprate Na5RbCu4(AsO4)4Cl2: phase transitions and AFM order as seen by 87Rb NMR
Physica B: Condensed Matter
0921-4526
378-80
2006
11241125
Ilmunud
1.1. Teadusartiklid, mis on kajastatud Web of Science andmebaasides Science Citation Index Expanded, Social Sciences Citation Index, Arts & Humanities Citation Index ja/või andmebaasis Scopus (v.a. kogumikud)
WOS

Viited terviktekstile

dx.doi.org/10.1016/j.physb.2006.01.523

Lisainfo

We report the 87Rb nuclear magnetic resonance (NMR) results in a recently synthesized Na5RbCu4(AsO4)Cl2. This complex novel two-dimensional (2D) cuprate is an unique magnetic material, which contains layers of coupled Cu4O4 tetramers. In zero applied magnetic field, it orders antiferromagnetically via a second-order low-entropy phase transition at Click to view the MathML source. We characterize the ordered state by 87Rb NMR, and suggest for it a non-collinear rather than collinear arrangement of spins. We discuss the properties of Rb nuclear site and point out the new structural phase transition(s) around 74 and 110 K.
Tetramer; Cuprate; NMR; Antiferromagnetic order
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