Мақола

Frustrated magnetism of the triangular-lattice antiferromagnets α-CrOOH and α-CrOOD

Jiabin LiuWuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, 430074 Wuhan, People’s Republic of ChinaBenqiong LiuKey Laboratory of Neutron Physics, Institute of Nuclear Physics and Chemistry, CAEP, 621900 Mianyang, People’s Republic of ChinaLong YuanWuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, 430074 Wuhan, People’s Republic of ChinaBoqiang LiWuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, 430074 Wuhan, People’s Republic of ChinaLei XieKey Laboratory of Neutron Physics, Institute of Nuclear Physics and Chemistry, CAEP, 621900 Mianyang, People’s Republic of ChinaXiping ChenKey Laboratory of Neutron Physics, Institute of Nuclear Physics and Chemistry, CAEP, 621900 Mianyang, People’s Republic of ChinaHongxia ZhangDepartment of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices, Renmin University of China, 100872 Beijing, People’s Republic of ChinaDaye XuDepartment of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices, Renmin University of China, 100872 Beijing, People’s Republic of ChinaWei TongAnhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, 230031 Hefei, People’s Republic of ChinaJinchen WangDepartment of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices, Renmin University of China, 100872 Beijing, People’s Republic of ChinaYuesheng LiWuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, 430074 Wuhan, People’s Republic of China

New Journal of Physicsjournal2021en

ABI

Аннотация

Abstract We report a comprehensive investigation of the frustrated magnetism on the delafossite oxides, α -CrOOH and α -CrOOD, which experimentally realize the S = 3/2 nearly-Heisenberg antiferromagnetic ( J 1 > 0) model on a triangular lattice with weak single-ion anisotropy ( D ). The electron spin resonance (ESR), neutron scattering, and specific heat ( C m ) measurements on both α -CrOOH and α -CrOOD consistently indicate that the long-range 120° Néel order is significantly suppressed and both systems are in the vicinity of a spin-liquid phase with C m ∼ T 2 at low temperatures. The strength of D is quantitatively determined from fitting the high-temperature ESR linewidth and magnetic susceptibility, and its minus sign ( D < 0, easy-axis type) is suggested by the low-energy ( E ⩽ 2 meV) spin excitations. This easy-axis anisotropy ( D / J 1 ∼ −5%) competes with the 120° Néel order and thus enhances the quantum spin fluctuations at low temperatures.

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Мавзулар

Advanced Condensed Matter Physics Physics of Superconductivity and Magnetism Multiferroics and related materials

Идентификаторлар

DOI: 10.1088/1367-2630/abe813

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