Quantum Design中国用户科研成果快报（2021年第8期）

QuantumDesign

2021.9.23

作者 Quantum Design中国子公司

TA的动态

Quantum Design中国用户科研成果快报

（2021年第8期）

《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。

本期文献目录：

1. 2D Metallic Transition‐Metal Dichalcogenides: Structures, Synthesis, Properties, and Applications. Advanced Functional Materials (2021) 湖南大学段曦东等.

2. Reacquainting the Electrochemical Conversion Mechanism of FeS₂ Sodium-Ion Batteries by Operando Magnetometry. J Am Chem Soc (2021) 青岛大学李强等.

3. Emergent properties at oxide interfaces controlled by ferroelectric polarization. npj Computational Materials (2021) 西安交通大学任晓兵等.

4. Large and sensitive magnetostriction in ferromagnetic composites with nanodispersive precipitates. NPG Asia Materials (2021) 西安交通大学任晓兵等.

5. Evolution of Superconducting Properties in Fe_1.1Se_0.8Te_0.2 Films Before and After Structure Avalanche. ACS Appl Mater Interfaces (2021) 上海大学曹世勋等.

6. Enhanced thermoelectric performance of phthalocyanine complexes/single-walled carbon nanotube hybrids by tuning the types of metal coordination ions. Composites Communications (2021) 中科院上海硅酸盐所陈立东等.

7. Investigation on Low-Temperature Thermoelectric Properties of Ag₂Se Polycrystal Fabricated by Using Zone-Melting Method. J Phys Chem Lett (2021) 中科院上海硅酸盐所陈立东等.

8. Regulation of Exciton for High Thermoelectric Performance in (Bi, Sb)₂Te₃ alloys via doping with Pb and Multi-scale Microstructure. Journal of the European Ceramic Society (2021) 武汉理工大学唐新峰等.

9. Field-controlled tunability of novel multifunctional phenomena in Tb-substituted La₂CoMnO₆: Role of antisite disorder. Ceramics International (2021) 上海大学曹世勋等.

10. Carrier-dependent quadratic scaling of anomalous Hall conductivity in ferromagnetic semiconductor. Results in Physics (2021) 山东大学颜世申等.

11. Unusual magnetic and magnetostriction behavior around the magnetic compensation temperature in Co₂TiO₄. Physical Review B (2021) 中科院物理所程金光等.

12. Magnetic and electric field dependent anisotropic magnetoelectric multiferroicity in SmMn₃Cr₄O₁₂. Physical Review B (2021) 中科院物理所龙有文等.

13. Topological Hall effect in frustrated B2-ordered Mn_0.74Co_0.57Al_0.69 films. Physical Review B (2021) 兰州大学薛德胜等.

14. Coexistence of ferromagnetism and topology by charge carrier engineering in the intrinsic magnetic topological insulator MnBi₄Te₇. Physical Review B (2021) 南京大学宋凤麒等.

15. Anisotropic magnetocaloric effect and magnetoresistance in antiferromagnetic HoNiGe₃ single crystal. Intermetallics (2021) 江西理工大学马胜灿等.

16. Modulation of Weyl semimetal state in half-Heusler GdPtBi enabled by hydrostatic pressure. New Journal of Physics (2021) 中科院物理所王文洪等.

17. Bright, Angle-Independent, Solvent-Responsive, and Structurally Colored Coatings and Rewritable Photonic Paper Based on High-Refractive-Index Colloidal Quasi-Amorphous Arrays. ACS Applied Nano Materials (2021) 西安交通大学杨森等.

18. Coercivity Mechanism and Magnetization Reversal in Anisotropic Ce-(Y)-Pr-Fe-B Films. Materials (Basel) (2021) 中科院金属所张志东等.

19. The ferrimagnetic super-exchange interactions in post-annealed Bi₄Ti₃O₁₂-La_0.5Sr_0.5MnO₃. Journal of Magnetism and Magnetic Materials (2021) 中国科技大学陆亚林等.

20. Observation of large in-plane anisotropic transport in van derWaals semiconductor Nb₂SiTe₄. Chinese Physics B (2021) 上海科技大学郭艳峰等.

21. Long-Time Magnetic Relaxation in Antiferromagnetic Topological Material EuCd₂As₂. Chinese Physics Letters (2021) 中科院物理所周兴江等.

22. Preparation of Superconducting Thin Films of Infinite-Layer Nickelate Nd_0.8Sr_0.2NiO₂. Chinese Physics Letters (2021) 中科院物理所周兴江等.

湖南大学段曦东综述文章

2D Metallic Transition‐Metal Dichalcogenides: Structures, Synthesis, Properties, and Applications. Advanced Functional Materials (2021).

摘要

二维材料和异质结为研究新奇物理和化学性质提供了一个理想的材料平台，并在(光电)电子器件、电催化和能量存储等领域展现出新的应用前景。二维过渡金属二硫族化合物(2D TMDs)，涵盖有二维半导体TMDs (s-TMDs)和二维金属/半金属TMDs (m-TMDs)等领域，一直备受科学界关注。在过去的十年中，2D s-TMDs被广泛研究。不仅因其固有磁性、电荷密度波和超导等独特的物理特性，而且因其在高性能电子器件、催化、金属电接触等方面的潜在应用价值。然而，系统而全面地研究m-TMDs的文献报道甚少。本篇综述重点介绍了二维m-TMDs在结构、合成方法、物理性质和功能应用等方面的新进展以及目前的挑战和前景。

PPMS VSM

The magnetic hysteresis (M–H) curve measured by physical properties measurement system (PPMS) demonstrates that few-layered VTe₂ obtained by the CVD method exhibits room temperature ferromagnetism.

青岛大学李强等

Reacquainting the Electrochemical Conversion Mechanism of FeS₂ Sodium-Ion Batteries by Operando Magnetometry. J Am Chem Soc (2021) .

摘要

过渡金属化合物在锂离子电池(LIBs)中具有优异的电化学性能，但在钠离子电池(SIBs)中却表现出较差的容量和循环性能，说明这两种体系存在不同的反应机制。本文通过电化学测量结合原位磁测量，对典型FeS₂/Na (Li)电池的离子嵌入机制与电化学性能之间的内在关系进行了全面研究。原位磁测量和非原位透射电子显微镜(TEM)测量表明，SIBs电池只有部分FeS₂参与了电池反应，而未反应FeS₂形成了“非活性核心”，导致电池容量低。通过Langevin拟合量化，我们进一步表明SIBs中电池反应产生的铁颗粒尺寸比LIBs中小得多，这可能导致更严重的粉化，从而使得SIBs循环性能更差。SIBs中出现上述两种现象的根本原因是较大的钠离子半径引起电池动力学迟缓。本研究为高容量、长耐久性的新型SIB材料的研究开辟了新的途径。

PPMS VSM

Magnetic measurements were performed on a physical property measurement system (PPMS, Quantum Design) using the self-developed batteries for the in situ measurements.

西安交通大学任晓兵等

Emergent properties at oxide interfaces controlled by ferroelectric polarization. npj Computational Materials (2021).

摘要

铁电材料在外场的变化下可实现自发化可调，因而可作为“门”来调控铁电/绝缘体界面性质。本文综述了近年来利用铁电化技术调制氧化物异质/同质界面的研究进展。我们讨论了近发展起来的四维扫描透射电子显微镜的潜在应用，以及这种技术如何促进铁电化诱导现象的基本机理研究并刺激未来的计算研究。后，本文展望了材料计算在该领域未来发展中的潜力、挑战和机遇。

SQUID

Scanning superconducting quantum interference device (SQUID) magnetometry (50 kOe) shows that the STO/PTO heterostructures display an obvious ferromagnetic hysteresis below a critical magnetic field (H_T ~ 5 kOe) at 300 K and can reversibly transition into diamagnetic behavior above HT.

西安交通大学任晓兵等

Large and sensitive magnetostriction in ferromagnetic composites with nanodispersive precipitates. NPG Asia Materials (2021) .

摘要

巨大而灵敏的磁致伸缩(小磁场引起的大应变)是磁致伸缩材料应用的迫切要求。然而，由于磁致伸缩和开关场都与磁晶各向异性成正比，因此很难同时实现磁致伸缩的提升和开关场的降低。为了解决矛盾，本文将四方纳米沉淀物引入立方矩阵，实现了巨大而敏感的磁致伸缩。我们发现，Fe-Ga合金的磁致伸缩优值（饱和磁致伸缩与磁晶各向异性常数的比值）可通过佳老化的前驱体提高5倍以上。一方面，老化诱导的纳米分散面心四方(FCT)沉淀造成了体心立方(BCC)基体的局域四方畸变，从而大大提高了饱和磁致伸缩能力，与单晶材料相当。另一方面，这些析出相在纳米尺度上与基体随机耦合，导致净磁晶各向异性变差。我们的发现不仅为提高随机多晶铁磁体的磁致伸缩性能提供了一种简单可行的方法，而且也为理解非均匀磁致伸缩机理提供了重要的见解。

SQUID

Room temperature initial magnetization curves were measured using a SQUID magnetometer, which allows us to calculate the MCA constant K₁ and saturation magnetization Ms according to the law of approaching saturation.

上海大学曹世勋等

Evolution of Superconducting Properties in Fe_1.1Se_0.8Te_0.2 Films Before and After Structure Avalanche. ACS Appl Mater Interfaces (2021) .

摘要

本文通过脉冲激光沉积在CaF₂衬底上制备一系列高质量Fe_1.1Se_0.8Te_0.2薄膜，揭示了薄膜的结构和超导性能随薄膜厚度的变化规律。我们发现存在一个阈值厚度，超过这个阈值， T_c 达到其佳值23.18 K且具有较大的活化能，从而在高场领域具有广阔的应用前景。重要的是，由于增加的应变能和较大的压应力之间的脆弱平衡，厚膜处于亚稳态。一旦平衡被外部扰动打破，一种独特的结构雪崩就会发生，很大一部分薄膜从衬底脱落并弯曲。薄膜的剥离部分仍为单相，其晶格参数和Tc 恢复了块体参考值。我们的结果证明了薄膜/衬底界面的压应力与FeSeTe薄膜中观察到的高临界温度密切相关。此外，本研究也为在相分离状态下制备独立的单相FeSeTe晶体提供了一种有效的方法。

PPMS Resistivity

Electrical transport properties were measured by using a standard four-probe method in a Quantum Design physical property measurement system (PPMS). For all the measurements, the magnetic field is applied perpendicular to the film surface.

中科院上海硅酸盐所陈立东等

Enhanced thermoelectric performance of phthalocyanine complexes/single-walled carbon nanotube hybrids by tuning the types of metal coordination ions. Composites Communications (2021) .

摘要

采用球磨和冷压法制备了三种金属酞菁配合物(MPc, M=Ni, Cu, Co)与单壁碳纳米管(SWCNTs)的杂化物，并对其热电性能进行了研究。MPc/SWCNT混合材料的电导率随SWCNT含量的增加而显著升高，且高于混合规则计算值，而Seebeck系数在整个范围内略有下降。拉曼分析和能级测量表明，MPc和SWCNTs之间发生了强烈的供体-受体相互作用。这种相互作用可以促进界面上载流子的输运，从而增加载流子迁移率，使得材料电导率大大超出混合规则推算。

PPMS

The carrier concentration and carrier mobility were measured in a Quantum Design Physics Property Measurements System (PPMS).

中科院上海硅酸盐所陈立东等

Investigation on Low-Temperature Thermoelectric Properties of Ag₂Se Polycrystal Fabricated by Using Zone-Melting Method. J Phys Chem Lett(2021) .

摘要

硒化银Ag₂Se是一种具潜力的低温热电材料，一方面可用于收集发电产生的低质量废热，另一方面也可用于微电子器件的冷却。目前，Ag₂Se及其合金的研究已成为热电界的热点，但对300 K以下Ag₂Se的热电性能研究甚少。本文采用区域熔融法制备了Ag₂Se，系统地研究了5 ~ 380 K温度范围内， Ag₂Se的电和热输运性能。通过与之前报道的Ag₂Se和其他典型低温热电材料如Mg₃Bi₂ 、Bi₂Te₃和BiSb的数据对比，发现区域熔融法制备的Ag₂Se具有本征半导体特性、超高的载流子迁移率、较小的态密度有效质量和超低的晶格热导率。在300 K时，区域熔融法制备的Ag₂Se的zT为0.75。本研究将为Ag₂Se的进一步研究提供参考。

PPMS TTO & ETO & HC

The thermoelectric properties at 5−300 K were measured by a physical property measurement system (PPMS, Quantum Design, U.S.A.). Electrical conductivity was measured using electrical transport option (ETO) with traditional four probes and Hall coefficient (R_H) was measured using AC transport mode with five-wires methods. The cryogenic specific heat capacity (Cp) below 300 K was measured utilizing the heat capacity option on PPMS.

武汉理工大学唐新峰等

Regulation of Exciton for High Thermoelectric Performance in (Bi, Sb)₂Te₃ alloys via doping with Pb and Multi-scale Microstructure. Journal of the European Ceramic Society(2021) .

摘要

本文报导了通过在本征激发机制中动态调节激发行为，实现了BiSbTe合金热电性能的可重复性地改善。Pb掺杂使载子浓度增加到佳值，使Pb_0.01(Bi_0.46Sb_1.54)_0.995Te₃材料的本征激发起始温度从350 K上升到450 K。此外，melt-spinning过程中产生的细化晶粒、纳米结构和密集位错不仅通过增强界面声子散射降低了晶格热导率，而且选择性地阻挡了少数载流子的迁移，改变了载流子的动态过程，使μ_e/μ_h比例变小，从而提高了测量温度范围内的功率因数，并抑制了本征激励范围内的双热导率。这些因素使得Pb_0.002(Bi_0.46Sb_1.54)_0.999Te₃样品在380 K时ZT值高达到1.31，在300 ~ 500 K时ZT平均值高，为1.17。在175 K温度梯度下，该材料制成的热电模块的热电转换效率为4.38%，比相同温度梯度下的商用ZM基模块提高了20%。