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説明:

We measured the temperature dependence of the magnetic susceptibility and specific heat and the magneticfield dependence of the magnetization of CuInVO5. An antiferromagnetically ordered state appears below TN = 2.7 K. We observed a 1/2 quantum magnetization plateau above 30 T at 1.3 K. We consider that the probable spin model for CuInVO5 is an interacting spin- 1/2 tetramer model. We evaluated values of the intratetramer interactions as J1 = 240 ± 20 K (antiferromagnetic) and J2 = −142 ± 10 K (ferromagnetic). The ground state of the isolated spin tetramer with the J1 and J2 values is spin singlet. The shrinkage of ordered magnetic moments by quantum fluctuation can be expected. Detectable low-energy longitudinal-mode magnetic excitations may exist in CuInVO5.

権利情報:

キーワード: magnetism, spin- 1/2 tetramer, antiferromagnetically ordered state, CuInVO5, magnetization

刊行年月日: 2016-11-14

出版者: American Physical Society

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研究助成金:

原稿種別: 査読前原稿 (Author's original)

MDR DOI:

公開URL: https://doi.org/10.1103/PhysRevB.94.174421

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更新時刻: 2024-01-05 22:13:43 +0900

MDRでの公開時刻: 2021-08-14 03:55:55 +0900