《Quantum Design中国用户科研成果快报》是由Quantum Design中国定期汇总Quantum Design中国用户（包括综合物性测量PPMS、全新一代磁学测量系统MPMS3用户等）在众多研究领域的近期科研成果，为大家的相关科学研究提供参考。
1. Fluctuating magnetic droplets immersed in a sea of quantum spin liquid. The Innovation (2023) 复旦大学 李世燕.
2. Fe-Intercalation Dominated Ferromagnetism of van der Waals Fe3GeTe2. Adv Mater (2023) 上海科技大学 郭艳峰.
3. Spin‐Phonon Scattering‐Induced Low Thermal Conductivity in a van der Waals Layered Ferromagnet Cr2Si2Te6. Advanced Functional Materials (2023) 中科院物理所 王文洪.
4. Electric-field control of reversible electronic and magnetic transitions in two-dimensional oxide monolayer magnets. Science Bulletin (2023) 中科大 陆亚林.
5. Perpendicular in-plane negative magnetoresistance in ZrTe5. Sci Bull (Beijing) (2023) 北京大学 陈建豪.
6. Electrical detection of spin pumping in van der Waals ferromagnetic Cr2Ge2Te6 with low magnetic damping. Nat Commun (2023) 中科院物理所 于国强.
7. Experimental demonstration of a skyrmion-enhanced strain-mediated physical reservoir computing system. Nat Commun (2023) 中科院半导体所 赵建华.
8. Emergent and robust ferromagnetic-insulating state in highly strained ferroelastic LaCoO3 thin films. Nat Commun (2023) 南京航空航天大学 李伟伟.
9. Multi-state data storage in a two-dimensional stripy antiferromagnet implemented by magnetoelectric effect. Nat Commun (2023) 北京大学 叶堉.
10. Enhanced flux pinning by refined structural/magnetic domains in nickel-doped BaFe2As2 single crystals. Materials Today Physics (2023) 中科院电工所 马衍伟.
11. Grain boundary construction and properties enhancement for hot deformed (Ce,La,Y)-Fe-B magnet by a two-step diffusion process. Journal of Materials Science & Technology (2023) 华南理工大学 刘仲武.
12. Record High 36 K Transition Temperature to the Superconducting State of Elemental Scandium at a Pressure of 260 GPa. Physical Review Letters (2023) 中科大 陈仙辉.
13. Exploring the heat capacity and magnetocaloric behaviors of rare-earth based multicomponent (Ce0.71Pr0.07Nd0.22)2Fe17‐xSix alloys. Journal of Alloys and Compounds (2023) 西安交通大学 杨森.
14. Multiple spin switching and magnetocaloric effects in orthoferrite Yb0.25Tb0.75FeO3 single crystal. Journal of Alloys and Compounds (2023) 上海大学 曹世勋.
15. Robust Weak Antilocalization Effect Up to ~120 K in the van der Waals Crystal Fe5-xGeTe2 with Near-Room-Temperature Ferromagnetism. J Phys Chem Lett (2023) 上科大 郭艳峰.
16. Superior comprehensive properties of LaFe11.8Si1.2/Ce60Co40 magnetocaloric composites. Journal of Rare Earths (2023) 华南理工大学 刘仲武.
17. A Combined Synthetic, Magnetic, and Theoretical Study on Enhancing Ligand-Field Axiality for Dy(III) Single-Molecule Magnets Supported by Ferrocene Diamide Ligands. Inorg Chem (2023) 北京大学 高松.
18. Rapid formation of the magnetocaloric phase in La-Fe-Co-Si magnetocaloric alloys for near room temperature applications. Intermetallics (2023) 华南理工大学 刘仲武.
19. Crystal structure and physical properties of layered Na2Fe2S2O. Journal of Physics and Chemistry of Solids (2023) 浙江大学 曹光旱.
20. Octahedral lanthanide clusters containing a central PO43- anion: structures, luminescent, magnetic and relaxometric properties. Dalton Transactions (2023) 南京大学 郑丽敏.
21. K2Ni(SeO3)2: A Perfect S = 1 Triangular-Lattice Antiferromagnet with Strong Geometric Frustration and Easy-Plane Anisotropy. Crystal Growth & Design (2023) 华中科技大学 夏正才.
22. Photocarrier transport of ferroelectric photovoltaic thin films detected by the magnetic dynamics of adjacent ferromagnetic layers. Physical Review B (2023) 清华大学 南策文.
23. Enhanced magnetic anisotropy induced by praseodymium ferromagnetic order and anomalous transport properties in PrMn2Ge2 single crystals. Physical Review B (2023) 中科院物理所 王文洪.
24. Noncollinear commensurate antiferromagnetic structure in metallic Pr2PdAl7Ge4. Physical Review B (2023) 中科院金属所 张志东.
25. Significant improvement of the lower critical field in Y doped Nb: potential replacement of basic material for the radio-frequency superconducting cavity. Superconductor Science and Technology (2023) 南京大学 闻海虎.
26. Doping evolution of superconductivity, charge order, and band topology in hole-doped topological kagome superconductors Cs(V1−xTix)3Sb5. Physical Review Materials (2023) 南方科技大学 何洪涛.
27. Tuning charge transfer and magnetic properties in LaCoO3/LaMnO3/LaCoO3 trilayers by oxygen content. Journal of Applied Physics (2023) 同济大学 周仕明.
28. Observation of superior magnetocaloric performance in multicomponent (Ce0.71Pr0.07Nd0.22)2Fe17-xAlx (x = 0.6, 0.8) compounds. Materials Letters (2023) 西安交通大学 杨森.
29. Enhanced specific heat of the Sc79Fe21 nanoglass compared to the Sc79Fe21 amorphous melt-spun ribbon in a temperature range of 150–300 K. Materials Letters (2023) 中科院化物所 史全.
30. Boosting Interfacial Polarization Through Heterointerface Engineering in MXene/Graphene Intercalated-Based Microspheres for Electromagnetic Wave Absorption. Nanomicro Lett (2023) 浙江大学 秦发祥.
复旦大学 李世燕等
Fluctuating magnetic droplets immersed in a sea of quantum spin liquid. The Innovation (2023)
量子自旋液体(QSL)是强涨落和纠缠的自旋在零温下的奇异磁态，是当今凝聚态物理学的一个主要主题。然而，目前已发现的QSL候选者中都无法明确定义非局限自旋子。阻挫自旋晶格中理想QSL态的形成受到无序和竞争交换作用的阻碍。本文对具有完美三角形晶格的NaYbSe2单晶（Yb3+离子有效自旋为1/2）进行了磁化率、超低温比热、μ子自旋弛豫(μSR)、核磁共振(NMR)和导热性质测量。这些实验证据表明在各自最低测量温度下， NaYbSe2没有远程磁序形成。而且，比热、μSR和NMR表明，NaYbSe2中准静态和动态自旋共存。这些准静态自旋的散射可能导致磁性热导率的缺失。因此，本文提出了一个假想，涨落亚铁磁液滴浸泡在QSL海洋中。这可能在寻找理想QSL的过程中十分常见，但本文提供了一个全新的平台来研究QSL状态如何在杂质中存活并与其他磁有序状态共存。
PPMS HC & DR + MPMS
The magnetic susceptibility measurements were performed in commercial SQUID and the specific heat was measured in the physical property measurement system (PPMS) (Quantum Design) by the relaxation method.
上海科技大学 郭艳峰等
Fe-Intercalation Dominated Ferromagnetism of van der Waals Fe3GeTe2. Adv Mater (2023)
Fe3GeTe2具有丰富物理特性。然而，其可变居里温度(Tc) 的潜在机制仍未解决。本文分别研究了Tc为160、210和230 K的Fe3GeTe2晶体的原子结构。元素分布显示，高居里温度Tc(210和230 K)样品中Fe插层进入范德华间隙位置，并且电输运测量可以观察到交换偏置效应，而在低居里温度Tc(160 K)样品中不可见。第一性原理计算进一步表明，Fe插层导致的局部反铁磁耦合可能导致交换偏置的产生，层间的交换路径对Tc的增强有很大的贡献。Fe插层的发现阐明了反铁磁序的产生可能是Fe3GeTe2中Tc增强的基础。
PPMS Resistivity
For transport measurements, a thin FGT flake was transferred on pre-patterned Ti/Au electrodes under inert atmosphere, using standard mechanical exfoliation and polymer transfer method. The device was wire bonded on the puck and loaded into Physical Property Measurement System (PPMS, Quantum Design) as soon as possible.
中科院物理所 王文洪等
Spin‐Phonon Scattering‐Induced Low Thermal Conductivity in a van der Waals Layered Ferromagnet Cr2Si2Te6. Advanced Functional Materials (2023)
层状范德华(vdW)磁体是开发磁电、磁光和自旋电子器件的主要平台。而低导热系数(κ)对自旋电子学，特别是自旋热学应用，非常重要。本文结合热输运测量和密度泛函计算，发现典型vdW铁磁体Cr2Si2Te6在33 K以上的顺磁态下，较宽的温度范围内热导κ降至 1 Wm−1K−1 。这是因为磁涨落的发展使得自旋声子散射增强，导致热导显著下降，与无定形二氧化硅相当。在磁有序态下，磁-声共振散射限制了κ小于≈2 Wm−1K−1 （如果没有磁散射， κ会增大3倍）。外加磁场可以强烈抑制自旋声子散射，导致κ的大幅增强。通过考虑温度和磁场相关的自旋声子散射效应，理论计算可以拟合κ的复杂变化。在Cr2Si2Te6中易于被磁场调控的低κ的实现，可促进vdW磁体在自旋热学领域的应用。本研究中理论拟合也增进了对自旋声子散射的理解。
PPMS VSM & HC & TTO
Magnetization and specific heat experiments were performed in a Physical Property Measurement System (Quantum Design, DynaCool 9 T). Magnetization was measured using the Vibrating Sample Magnetometer (VSM) option. Specific heat measurements were carried out using the standard relaxation method. Thermal conductivity results were obtained using the Thermal Transport Option provided by the Physical Property Measurement System.
中科大 陆亚林等
Electric-field control of reversible electronic and magnetic transitions in two-dimensional oxide monolayer magnets. Science Bulletin (2023)
原子厚度的氧化物磁性材料在下一代自旋电子学中潜力很大。二维氧化物磁性有望被磁场和电场有效调控，可发展未来的低耗散电子器件。然而，电场调控二维氧化物单层磁性却鲜有报道。本文在氧化物(SrRuO3)1/(SrTiO3)N (N = 1, 3)超晶格中实现二维单层磁性，并通过电场控制的质子(H+)演变可实现有效、可逆相变的发生。通过离子液体门调控(SrRuO3)1/(SrTiO3)1超晶格中的质子浓度，观察到电场诱导的金属-绝缘体相变，并伴随磁有序被抑制和磁各向异性调制。理论分析表明，质子插层在电/磁相变中起到关键作用。其中，SrTiO3层可以作为质子筛，显著影响质子演变。本文的工作通过电压控制实现二维氧化物单层磁性功能的有效调控，为未来的节能电子产品发展提供了潜力。
PPMS Resistivity + MPMS
The electric transport measurements were performed in a physical property measurement system equipment (Quantum design DynaCool system).The magnetic properties were probed by a quantum design superconducting quantum interference device (SQUID) magnetometer. The temperature dependent magnetization was measured during the warm process with an applied magnetic field of 0.05 T.
北京大学 陈建豪等
Perpendicular in-plane negative magnetoresistance in ZrTe5. Sci Bull (Beijing) (2023)
PPMS Resistivity
Electrical measurements were performed using a physical property measurement system (PPMS) with a standard lock-in technique
中科院物理所 于国强等
Electrical detection of spin pumping in van der Waals ferromagnetic Cr2Ge2Te6 with low magnetic damping. Nat Commun (2023）
原子厚度vdW材料中磁序的发现加强了自旋电子学与二维材料之间的联系。磁性二维材料在自旋电子器件中的一个重要但尚未证实的用途是，通过自旋泵浦效应进行相干自旋注入。本文报道了将Cr2Ge2Te6自旋泵入Pt或W，并利用可逆自旋霍尔效应检测自旋电流。Cr2Ge2Te6 /Pt杂化体系的磁动力学测量获得厚层Cr2Ge2Te6的磁阻尼常数为~ 4–10×10−4 （铁磁vdW材料中最低）。此外，该体系界面自旋传输效率很高 (自旋混合电导为2.4×1019/m2)，这有助于在vdW体系的界面上传递自旋关联量，如自旋角动量和自旋轨道矩。低磁阻尼有利于高效自旋流产生，再结合高界面自旋传输效率，说明Cr2Ge2Te6有望集成到低温二维自旋电子器件中作为相干自旋或磁子流的来源。
The spin-pumping measurement was performed in a physical property measurement system (PPMS), Quantum Design, Inc. Microwave was introduced into the PPMS’s chamber by low-loss cable (up to 40 GHz), it was applied on the devices by wire bonding the coplanar waveguide on Logers 4003 chip to GSG pads on the wafer. The voltage signal between the ends of the detection layer was measured by using a lock-in amplifier (SR830).
中科院半导体所 赵建华等
Experimental demonstration of a skyrmion-enhanced strain-mediated physical reservoir computing system. Nat Commun (2023)
物理存储具有本征非线性、高维度和记忆功能，有望可以有效解决复杂任务。特别是，自旋电子和应变介导的电子物理存储因其高速、多参数融合和低功耗特点而极具潜力。本文在(001)取向的0.7PbMg1/3Nb2/3O3−0.3PbTiO3 (PMN-PT)多层铁磁异质结中，实现了skyrmion增强应变介导的物理存储。这种增强源于磁skyrmion和应变调谐电阻率的融合。经过实验，应变介导RC系统功能完善，波形序列分类任务中识别率为99.3，而Mackey-Glass时间序列预测任务中20步预测的归一化均方根误差(NRMSE)为0.2。本文研究为发展磁-电-铁弹性可调性的低功耗神经形态计算系统奠定了基础，促进未来应变介导自旋电子应用的进一步发展。
MPMS
T.L., C.C., and L.Y. performed SQUID-VSM measurements.
南京航空航天大学 李伟伟等
Emergent and robust ferromagnetic-insulating state in highly strained ferroelastic LaCoO3 thin films. Nat Commun (2023)
过渡金属氧化物可用于发展新一代自旋电子器件，其物性可通过应变、缺陷和微观结构有效调制。铁弹LaCoO3就是一个很好的例子，块材为顺磁性，而拉伸应变的LaCoO3薄膜却表现为铁磁性，但起源仍然存在争议。本文揭示了LaCoO3薄膜中有序氧空位的形成和未曾报道的CoO6八面体旋转长程序的抑制。结合密度泛函理论计算，本文发现Co 3d-O 2p杂化导致Co-O-Co键角增加和Co-O键长增长，从而导致Co离子的晶体场劈裂减弱，促进了Co离子有序高自旋态形成，诱导出铁磁绝缘态。本文发现了拉伸应变铁弹LaCoO3薄膜中驱动铁磁绝缘态的可能潜在机制，有利于其在低功率自旋电子器件中的应用。
PPMS Resistivity + MPMS
Macroscopic magnetic measurements were performed with an MPMS3 SQUID-VSM magnetometer (Quantum Design). The magnetic field was applied parallel to the film plane during the measurements. Transport measurements were measured by a Quantum Design Physical Property Measurement System (PPMS).
北京大学 叶堉等
Multi-state data storage in a two-dimensional stripy antiferromagnet implemented by magnetoelectric effect. Nat Commun (2023)
下一代低功耗、多功能和节能电子器件发展有赖于磁、电自由度耦合的新型材料研制。特别是，条纹反铁磁体材料破缺晶体、磁性对称性，通常导致磁电(ME)效应，而且其物性和功能可被电学手段操纵。扩展数据存储和技术处理的边界需求导致了自旋电子学向二维(2D)平台发展。本文在二维条纹反铁磁绝缘体CrOCl中发现了ME效应。通过温度、磁场和外加电压参数下的隧穿电阻测量，验证其ME耦合可达到二维极限。利用磁相变时的多稳态和ME耦合，实现了隧道器件的多态数据存储。本文工作不仅增进了对自旋-电荷耦合的基本理解，而且还展示了二维反铁磁材料在超越传统二进制操作的器件和电路方面的巨大潜力。
PPMS VSM
Magnetization measurements were performed by standard modules of a Quantum Design PPMS.
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