Quantum Design中国用户科研成果快报（2022年第2期）

QuantumDesign

2022.5.24

QUANTUM量子科学仪器贸易（北京）有限公司

Quantum Design中国用户科研成果快报（2022年第2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. Observation of Short-Period Helical Spin Order and Magnetic Transition in a Nonchiral Centrosymmetric Helimagnet. Advanced Functional Materials (2022) 中科院物理所松山湖王文洪等.

2. High-Efficiency GeTe-Based Thermoelectric Module for Low-Grade Heat Recovery. Journal of Materials Chemistry A (2022) 中科院硅酸盐所陈立东等.

3. Pressure-Induced Dimensional Crossover in a Kagome Superconductor. Physical Review Letters (2022) 中国科技大学陈仙辉等.

4. A pH-responsive biomimetic drug delivery nanosystem for targeted chemo-photothermal therapy of tumors. Nano Research (2022) 北京大学侯仰龙等.

5. Ultrahigh in-plane thermoelectric performance in self-assembled PbSe: Au films with vertically aligned nanopillars. Acta Materialia (2022) 河北大学王淑芳等.

6. Organic-inorganic hybrid metallic conductors based on bis(ethylenedithio)tetrathiafulvalene cations and antiferromagnetic oxalate-bridged copper(ii) dinuclear anions. Journal of Materials Chemistry C (2022) 北京大学王哲明等.

7.Correlation between boson peak and thermal expansion manifested by physical aging and high pressure. Science China Physics, Mechanics & Astronomy (2022) 中科院物理所程金光等.

8. Enhanced performance of Bi₂Te₃-based thermoelectric materials by incorporating Bi2Fe4O9 magnetic nanoparticles. Journal of Alloys and Compounds (2022) 武汉大学熊锐等.

9. Competing ferromagnetic and antiferromagnetic interactions drive the magnetocaloric tunability in Gd₅₅Co₃₀Ni_xAl_15-x microwires. Journal of Alloys and Compounds (2022) 浙江大学秦发祥等.

10. Magnetoelectric coupling in Sr₃Co₂Fe_23.04Al_0.96O₄₁single crystal near room temperature. Journal of Alloys and Compounds (2022) 上海大学曹世勋等.

11. Metal-organic framework-derived Co/C composite with high magnetization as broadband electromagnetic wave absorber. Journal of Alloys and Compounds (2022) 中科院金属所张志东等.

12. Critical behavior of the ferromagnetic metal La₃CrAs₅ with quasi-one-dimensional spin chains. Journal of Alloys and Compounds (2022) 中科院物理所靳常青等.

13. Solid Base Assisted Dual-Promoted Heterogeneous Conversion of PVC to Metal-Free Porous Carbon Catalyst. Chemistry (2022) 中科院硅酸盐所黄富强等.

14. Centimeter-Sized Stable Zero-Dimensional Cs₃Bi₂I₉ Single Crystal for Mid-Infrared Lead-Free Perovskite Photodetector. The Journal of Physical Chemistry C (2022) 华中科技大学常海欣等.

15. Structure and transport properties of the quasi-one-dimensional telluride Ta_1.2Os_0.8Te₄. Physical Review B (2022) 浙江大学曹光旱等.

16. A-site Mn²⁺ tuned magnetism and electrical transport properties in the transition-metal-only perovskite oxide MnCu₃Mn₄O₁₂. Physical Review B (2022) 中科院物理所龙有文等.

17. Effect of yttrium substitution on magnetic properties and service performances of Nd-Fe-B sintered magnets. Journal of Rare Earths (2022) 中科院宁波材料所陈仁杰等.

18. Antiferromagnetic Phase Induced by Nitrogen Doping in 2D Cr₂S₃. Materials (2022) 北京科技大学王守国等.

19. Enhanced hard-magnetic properties and thermal stability of nanocrystalline Ce-rich Ce-Fe-B alloys by combining La substitution and Si addition. Journal of Magnetism and Magnetic Materials (2022) 华南理工大学刘仲武等.

20. Large magnetoresistance and unexpected low thermal conductivity in topological semimetal CrP₄ single crystal. Applied Physics A (2022) 中科院物理所雒建林等.

21. Tricritical-point phase diagram in PrCu₉Sn₄. J Phys Condens Matter (2022) 中科院强磁场科学中心张裕恒等.

22. Large CaFeAsF single crystals of high quality grown by the oscillating temperature technique. Journal of Crystal Growth (2022) 中科院物理所任治安.等.

23. Discovery of Two Families of VSb-Based Compounds with V-Kagome Lattice. Chinese Physics Letters (2021) 复旦大学李世燕等.

24. Isomorphic heteromagnetism of an Fe₂MnGa alloy in a face-centered cubic structure. Materials Science and Engineering: B (2022) 中科院物理所松山湖王文洪等.

25. Magnetism of Tetragonal β-Fe₃Se₄ Nanoplates Controllably Synthesized by Thermal Decomposition of (β-Fe₂Se₃)₄[Fe(tepa)] Hybrid. Magnetism (2022) 中科院金属所张志东等.

中科院物理所松山湖王文洪等

Observation of Short-Period Helical Spin Order and Magnetic Transition in a Nonchiral Centrosymmetric Helimagnet. Advanced Functional Materials (2022)

摘要

应急电感器的发展前景持续推动纳米级螺旋序材料的研究。虽然这种自旋纹理在许多材料中已经被报道过，但大多数的自旋纹理都表现出较长的周期或仅可在远低于室温条件下工作。本文利用洛伦兹透射电子显微镜(TEM)多角度、多方位观测了室温下非手性中心对称螺旋磁体MnCoSi的有序螺旋自旋序周期仅为3.2 nm。中子粉末衍射和洛伦兹TEM原位观测到磁晶在228 K以下发生由有序螺旋自旋序向摆线自旋序的磁相变，这与温度诱导的磁晶各向异性变化密切相关。这些结果揭示了非手性中心对称螺旋磁体中螺旋有序自旋织构的起源，为寻找具有纳米自旋有序的材料提供了一种新的策略，在应急电磁学中具有潜在的应用前景。

MPMS

AC magnetic susceptibility measurements were carried out in a superconducting quantum interference device (SQUID, MPMS XL-7).

中科院硅酸盐所陈立东等

High-Efficiency GeTe-Based Thermoelectric Module for Low-Grade Heat Recovery. Journal of Materials Chemistry A (2022)

摘要

GeTe基化合物是优秀的中温区热电材料，其室温附近较差的热电性能限制了其在热回收领域的实际应用。在本工作中，我们证明了CuI-Bi共掺杂可有效提高GeTe在中低温区的ZT值。该热电模块由我们的(Ge_0.96Bi_0.04Te)_0.96(CuI)_0.04和n型Bi₂Te_2.7Se_0.3组成，在冷/热侧温度分别为300 K/700 K情况下热电转换效率为8.6%。经分析，CuI-Bi共掺杂能显著降低冗余空穴载流子的含量，同时保持较高的载流子迁移率。密度泛函计算表明，CuI和Bi的掺杂均能促进对称性从菱形向立方的转变，导致价带略有收敛，Seebeck系数有所提高。另外缺陷的出现增强了声子散射，晶格热导率明显降低。因此，在700 K时ZT峰值为2.0，平均ZT (300 ~ 700 K)为1.3。本研究表明， CuI-Bi共掺杂GeTe在具有较好的中低温区内低级热回收应用前景。

PPMS Resistivity

The room-temperature Hall coefficient R_H was measured on a physical property measurement system (PPMS-9, Quantum Design), then the carrier concentration n_H and carrier mobility μ_H were calculated from n_H = 1/(eR_H) and μ_H = σR_H.).

中国科技大学陈仙辉等

Pressure-Induced Dimensional Crossover in a Kagome Superconductor. Physical Review Letters (2022)

摘要

近发现的kagome超导体AV₃Sb₅显示出不寻常的高压相图，在中等压力下出现了一个新的圆顶状的超导相。然而，它的起源仍是未知的。在这里，我们对CsV₃Sb₅进行了高达150 GPa的高压电学测量、高压X射线衍射测量和性原理计算。我们发现新的超导相是相当稳健的，与层间的Sb2-Sb2相互作用关联在一起。Sb2−Sb2键在高压下的形成使系统由二维向三维转变，推动Sb2的p_z轨道向上跨越费米能级，导致态密度增强和T_C提升。我们的工作表明，高压下的维度crossover可以引起拓扑相变，并与反常T_C的演化有关。我们的发现也适用于其他层状材料。

PPMS Resistivity

Part of the transport measurements were carried out using the Quantum Design PPMS9.

北京大学侯仰龙等

A pH-responsive biomimetic drug delivery nanosystem for targeted chemo-photothermal therapy of tumors. Nano Research (2022)

摘要

纳米智能给药系统具有时间、空间和剂量可控释放的可能性，在肿瘤治疗中具有重要意义。然而，在癌症治疗中纳米给药系统的治疗效果往往受到治疗药物在网状内皮系统中富集的影响而大打折扣。基于此，我们研究开发了一种巨噬细胞膜(MCM)仿生药物递送纳米系统，即MnFe₂O₄-DOX-MCM纳米立方体(NC)，具有肿瘤靶向、pH刺激药物释放和化学光热治疗作用。由于MCM修饰，该纳米系统显示了免疫逃逸的能力，并增强了癌细胞的细胞摄取。MnFe₂O₄ NCs与DOX之间的键合在生理条件下保持稳定，并能在内吞溶酶体pH刺激下立即释放药物。同时，纳米系统的光热效应破坏肿瘤组织，进一步提高化疗效果。体内实验结果表明，NCs具有肿瘤导向能力，具有显著的协同治疗作用。因此，pH响应的仿生药物递送纳米系统MnFe₂O₄ -DOX-MCM NCs是一种有效的纳米平台，可能在癌症协同治疗方面有潜在的应用前景。

PPMS VSM

The magnetic property of the NCs was measured by physical property measurement system (PPMS).

河北大学王淑芳等

Ultrahigh in-plane thermoelectric performance in self-assembled PbSe: Au films with vertically aligned nanopillars. Acta Materialia (2022)

摘要

具有可调物性的自组装纳米复合材料在先进器件领域具有潜在的应用前景。在这项工作中，我们用脉冲激光沉积法制备了具有垂直排列纳米晶(VANs)的自组装PbSe:Au薄膜。扫描隧道显微镜STM原子尺度揭示了异质结构，表明了我们在PbSe基体中制备了自组装Au纳米颗粒。与PbSe基体相比，PbSe:Au垂直界面起到了能量过滤效果，降低了面内导热系数。n型自组装VAN薄膜的ZT大值为~ 2.6@523K，比纯PbSe薄膜(ZT = 0.5)高约520%。这项研究表明，独特VAN的垂直界面提供了一个可行的途径来操纵热电材料的热电性能。

PPMS Resistivity

The Hall coefficients, carrier concentrations, and mobilities were measured by the standard four-terminal method with a physical property measurement system (Quantum Design).

北京大学王哲明等

Organic-inorganic hybrid metallic conductors based on bis(ethylenedithio)tetrathiafulvalene cations and antiferromagnetic oxalate-bridged copper(ii) dinuclear anions. Journal of Materials Chemistry C (2022)

摘要

由BEDT-TTF供体和草酸桥接双核阴离子组成的有机-无机复合物β′′-(BEDT-TTF)₃[Cu₂(μ–C₂O₄)(C₂O₄)₂(CH₃OH)(H₂O)]可由电化学手段获得，具有三斜P-1空间群，晶格参数为a = 7.4803(3) Å, b = 9.3547(3) Å, c = 18.6711(7) Å, α = 95.797(3)°, β = 90.974(3)°, γ = 93.508(3)°, V = 1297.06(8) Å³ ，Z = 1 @100 K 。供体排列属于β”相。从TTF核键长度和拉曼光谱分析，BEDT-TTF的氧化态为~ + 2/3。 CH₃OH和H₂O分子与方形金字塔位置的金属原子结合，占比为0.5。阴离子片中反铁磁双核阴离子之间通过氢键形成超分子方阵。从100 K的能带结构出发，得到了金属的电导率与四探针的电导率测量结果一致：室温下金属的电导率为11.5 Scm⁻¹；在7.6 K时金属的电导率增加到160 S cm⁻¹；在2 K时金属的电导率下降到150 S cm⁻¹ 。磁测量表明该材料没有长程磁序，这与比热测量相吻合。

PPMS Resistivity + MPMS

The conductivity measurements were performed by the four probe method with 13 mm gold wires attached by gold paste on the best developed surface of a single crystal from 2 to 300 K using a Quantum Design PPMS 9XL system. The magnetization measurements were performed for crystals tightly packed in an Al bag using a Quantum Design MPMS 7XL system.

中科院物理所程金光等

Correlation between boson peak and thermal expansion manifested by physical aging and high pressure. Science China Physics, Mechanics & Astronomy (2022)

摘要

我们研究了高压和物理老化对典型金属玻璃玻色子峰和热膨胀的影响。发现热膨胀系数和玻色子峰强随物理老化过程单调减小。而随压力的增大，玻色子峰值强度和热膨胀系数一致的先减小，随后增大。玻色子峰值强度与热膨胀系数呈近似线性关系。金属玻璃的热膨胀受结构弛豫或再生的影响，反映了金属玻璃流动单元的变化和原子的堆积。我们的研究结果表明，结构弛豫或再生与快速玻色子峰动力学之间存在直接联系，这为研究玻色子峰行为和金属非玻璃的结构异质性提供了依据。

PPMS HC

The low temperature heat capacity C_p was measured from 2 to 100 K using the Quantum Design physical property measurement system (PPMS 6000).

免责申明：本文汇总的所有文献，仅出于信息传递之目的，不保证所有信息的准确性和完整性，若文中任何文字或图片有知识版权，请联系我们时间删除。