Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 76, Issue 6, Pages -Publisher
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.76.063711
Keywords
(CuBr)Sr2Nb3O10; square lattice; ion exchange; frustration; magnetization plateau; successive phase transitions
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A new triple-layered perovskite (CuBr)Sr2Nb3O10 with the S = 1/2 square lattice has been prepared through a chimie douce route. Presence of strong spin frustration is inferred from zero-field specific heat measurements which exhibit successive phase transitions at 9.3 and 7.5 K. Application of magnetic fields merges the transition temperatures at 3 T, suggesting that the intermediate phase is of magnetic origin with fluctuating spin-spin correlation. Despite the square geometry, magnetization curves have revealed a metamagnetic transition to a novel phase characterized by a 1/3 plateau of the saturated magnetization.
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