The magnetic phase diagram of CuFeO2 as a function of applied magnetic field and temperature is thoroughly explored and expanded, both for magnetic fields applied parallel and perpendicular to the material's c-axis. Pulsed field magnetization measurements extend the typical magnetic staircase of CuFeO2 at various temperatures, demonstrating the persistence of the recently discovered high field metamagnetic transition up to Tn2 ~ 11 K in both field configurations. An extension of the previously introduced phenomenological spin model used to describe the high field magnetization process (Phys. Rev. B, 80, 012406 (2009)) is applied to each of the consecutive low-field commensurate spin structures, yielding a semi-quantitative simulation and intuitive description of the entire experimental magnetization process in both relevant field directions with a single set of parameters.
The triangular lattice compound TlYbS$_2$ was prepared as large single crystals via a molten flux growth technique using sodium chloride. Anisotropic magnetic susceptibility measurements down to 0.4 K indicate a complete absence of long-range magnetic order. Despite this lack of long-range order, short-range antiferromagnetic interactions are evidenced through broad transitions, suggesting frustrated behavior. Variable magnetic field measurements reveal metamagnetic behavior at temperatures less than 2 K. Complex low temperature field-tunable magnetic behavior, in addition to no observable lon…
Magnetic properties of a buckled honeycomb lattice antiferromagnet
Indian Institute of Technology Madras（印度马德拉斯理工学院）；Quantum Centre of Excellence for Diamond and Emergent Materials, Indian Institute of Technology Madras（印度马德拉斯理工学院量子卓越中心（钻石与新兴材料））
Magnetic Transitions in the Chiral Armchair-Kagome System Mn$_2$Sb$_2$O$_7$
受抑磁体中的相互作用之间的竞争允许各种各样的新基态，通常表现出涌现的物理和独特的激发。扩展可供研究的晶格套件增加了我们发现奇异物理的机会。Mn $_2$ Sb $_2$ O $_7$以手性kagome基结构形成，其中第四个成员被添加到kagome平面三角形以形成扶手椅单元并连接相邻的kagome平面。这种结构基序可以被看作是可果美网络的三角形和烧绿石晶格中的四面体之间的中间体。Mn $_2$ Sb $_2$ O $_7$在11.1和14.2 K时表现出两种不同的磁性相变，其中至少一种具有弱铁磁成分。磁传播矢量不改变，通过较低的过渡，建议变磁过渡或过渡涉及多个组件的序参量。虽然以前报道的$P3_121$空间群，锰$_2$锑$_2$ O $_7$实际上结晶在$P2$，这使得铁电性，我们表现出明确的证据表明磁电耦合指示多铁性秩序。准二维“扶手椅-kagome”晶格提供了一个很有前途的平台，用于探测手征磁性和高阻挫系统的维数效应。
In this paper we report the synthesis, magnetization and heat capacity of the frustrated magnets \emph{A}ErSe$_2$(\emph{A}=Na,K) which contain perfect triangular lattices of Er$^{3+}$. The magnetization data suggests no long-range magnetic order exists in \emph{A}ErSe$_2$(\emph{A}=Na,K), which is consistent with the heat capacity measurements. Large anisotropy is observed between the magnetization within the \emph{ab} plane and along the \emph{c} axis of both compounds. When the magnetic field is applied along \emph{ab} plane, anomalies are observed at 1.8 $μ_B$ in NaErSe$_2$ at 0.2 T and 2.1 …
Cerium diantimonide (CeSb$_2$) is one of a family of rare earth based magnetic materials that exhibit metamagnetism, enabling control of the magnetic ground state through an applied magnetic field. At low temperatures, CeSb$_2$ hosts a rich phase diagram with multiple magnetically ordered phases for many of which the order parameter is only poorly understood. In this paper, we report a study of its metamagnetic properties by Scanning Tunneling Microscopy (STM) and magnetization measurements. We use STM measurements to characterize the sample magnetostriction with sub-picometer resolution from …
Magnetic ground state, critical analysis of magnetization, and large magnetocaloric effect in the ferromagnetically coupled kagome lattice YCa$_3$(MnO)$_3$(BO$_3$)$_4$
Magnetic and crystal electric field excitations in a spin-orbit coupled frustrated hyperkagome magnet Nd$_3$Li$_3$W$_2$O$_{12}$
Indian Institute of Science Education and Research Thiruvananthapuram（印度科学教育研究所特里凡得琅分校）；Technical University of Denmark（丹麦技术大学）；Forschungszentrum Jülich GmbH（于利希研究中心有限公司）；RWTH Aachen（亚琛工业大学）；ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory（ISIS中子与μ子源，英国科学与技术设施委员会，卢瑟福阿普顿实验室）
Rare earth triangular lattice materials have been proposed as a good platform for the investigation of frustrated magnetic ground states. KErSe$_2$ with the delafossite structure, contains perfect two-dimensional Er$^{3+}$ triangular layers separated by potassium ions, realizing this ideal configuration and inviting study. Here we investigate the magnetism of KErSe$_2$ at miliKelvin temperatures by heat capacity and neutron powder diffraction. Heat capacity results reveal a magnetic transition at 0.2 K in zero applied field. This long-range order is suppressed by an applied magnetic field of 0…
Electric-field-tuned consecutive topological phase transitions between distinct correlated insulators in moire MoTe2/WSe2 heterobilayer
State Key Laboratory of Micro-nano Engineering Science, Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University（上海交通大学物理与天文学院，微纳工程科学国家重点实验室，人工结构与控制教育部重点实验室）；School of Applied and Engineering Physics, Cornell University（康奈尔大学应用与工程物理学院）；Departments of Physics and Applied Physics, Stanford University（斯坦福大学物理与应用物理系）；National Institute for Materials Science（日本物质材料研究机构）；SLAC National Accelerator Laboratory（斯坦福直线加速器国家实验室）；Tsung-Dao Lee Institute, Shanghai Jiao Tong University（上海交通大学李政道研究所）；Laboratory of Atomic and Solid State Physics, Cornell University（康奈尔大学原子与固态物理实验室）；Kavli Institute at Cornell for Nanoscale Science（康奈尔大学卡弗里纳米科学研究所）；Max Planck Institute for the Structure and Dynamics of Matter（德国马普物质结构与动力学研究所）
Ising Supercriticality and Universal Magnetocalorics in Spiral Antiferromagnet Nd$_3$BWO$_9$
Beihang University（北京航空航天大学）；Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所）；University of Chinese Academy of Sciences（中国科学院大学）；Southern University of Science and Technology（南方科技大学）；Huazhong University of Science and Technology（华中科技大学）
We determined the spin exchanges between the Cu2+ ions in the kagome layers of volborthite, Cu3V2O7(OH)2x2H2O, by performing the energy-mapping analysis based on DFT+U calculations, to find that the kagomé layers of Cu2+ ions are hardly spin-frustrated, and the magnetic properties of volborthite below ~75 K should be described by very weakly interacting antiferromagnetic uniform chains made up of effective S=1/2 pseudospin units. This conclusion was verified by synthesizing single crystals of not only Cu3V2O7(OH)2x2H2O but also its deuterated analogue Cu3V2O7(OD)2x2D2O and then by investigatin…
