In writing this report we had two goals in mind. The first is to provide a survey of a subset of discoveries from recent experiments performed on quantum matter in high magnetic fields, and to anticipate the scientific opportunities to be realized in even higher fields. Hopefully, the survey will convey a sense of the excitement and pace of high-magnetic-field research in the quantum-matter community to a broader audience (undergraduates, especially). The second goal is to discuss the comparative merits of two options: a pulsed-field facility for attaining a magnetic field of 150 Tesla (of duration 1-10 msec) or a DC field facility that attains 60 Tesla. A workshop involving leading scientists involved with quantum phenomena in high magnetic fields was held at NSF, Alexandria Sep. 21,22 (2017) to address these issues.
Quintuplet condensation in the skyrmionic insulator Cu2OSeO3 at ultrahigh magnetic fields
Shizuoka University（静冈大学）；Loughborough University（拉夫堡大学）；Leibniz Institute for Solid State and Materials Research Dresden（德累斯顿莱布尼茨固体与材料研究所）；University of Tokyo（东京大学）
Anomalous magnetic properties of multi-walled carbon nanotubes embedded with magnetic nanoparticles: Consistent with ultrahigh temperature superconductivity
我们报告的高温（300-1120 K）磁化数据的Fe和Fe 3 O 4纳米颗粒嵌入多壁碳纳米管。用高能同步辐射X射线衍射仪和电感耦合等离子体质谱仪精确测定了磁性杂质的含量。我们明确地表明，Fe和Fe 3 O 4纳米粒子的磁矩增强了约3倍，与他们预期的自由（未嵌入）磁性纳米粒子相比。磁化增强因子几乎与所施加的磁场无关，但显著地取决于冷却速率。更有趣的是，当样品被加热到1120 K时，增强的磁矩完全丧失，并且在1120 K时丧失的磁矩通过低于1020 K的几个热循环完全恢复。此外，在低于约60 K时，磁化强度迅速增加或减少。除了由于多壁碳纳米管中低温超导性的存在而产生的顺磁迈斯纳效应外，现有的物理模型无法解释这些反常的磁性。
Magnetic Transitions under Ultrahigh Magnetic Fields of up to 130 T in the Breathing Pyrochlore Antiferromagnet LiInCr4O8
利用脉冲磁场研究了自旋为3/2的反铁磁体LiInCr 4 O 8在高达130 T的交变磁场下的磁化过程.在90 T ~ 130 T范围内，LiInCr_4 O_8具有较强的自旋-晶格耦合，与传统的铬尖晶石氧化物相似. LiGa 0.125 In 0.875 Cr 4 O 8的磁化强度在低温下的结构和磁转变被完全抑制，在13 T以上突然增加，表明在四聚体单重基态和总自旋为1的激发态之间存在2.2 meV的自旋间隙，后者通过施加磁场而稳定。呼吸烧绿石反铁磁体是一个独特的阻挫系统，具有很强的自旋-晶格耦合和键的交替。
Fate of Pomeranchuk effect in ultrahigh magnetic fields
Institute for Solid State Physics, University of Tokyo（东京大学固体物理研究所）；College of Science, Rikkyo University（立教大学理学部）；Research Center for Smart Molecules, Rikkyo University（立教大学智能分子研究中心）；Department of Physics, Faculty of Science, Shizuoka University（静冈大学理学部物理系）；Department of Advanced Materials Science, University of Tokyo（东京大学先进材料科学系）
