Experimental search for a muliple quantum-liquid state in organic magnets

2014 Fiscal Year Final Research Report

• Project/Area Number: 25620052
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Functional solid state chemistry
• Research Institution: National Institute for Materials Science
• Principal Investigator: ISONO Takayuki 独立行政法人物質・材料研究機構, 超伝導物性ユニット, NIMSポスドク研究員 (70625631)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 量子スピン液体 / 磁気トルク / 有機固体 / スピンフラストレーション

Outline of Final Research Achievements

In order to reveal magnetic excitations at low temperatures in quantum spin-liquid states of triangular-lattice organic magnets, we performed torque magnetometry on kappa-H_3(Cat-EDT-TTF)_2 and kappa-(BEDT-TTF)_2Cu_2(CN)_3. We found that magnetic susceptibility shows a nearly temperature-independent behavior with a finite value below the temperature of 3 K for both the magnets. The comparison of the finite values among the triangular-lattice organic magnets revealed the common nature of the quantum spin-liquid states; the values are scaled by antiferromagnetic exchange-coupling constants.

Free Research Field

固体物理、物質科学