Forslund Ola Kenji, Andreica Daniel, Sassa Yasmine, Nozaki Hiroshi, Umegaki Izumi, Nocerino Elisabetta, Jonsson Viktor, Tjernberg Oscar, Guguchia Zurab, Shermadini Zurab, Khasanov Rustem, Isobe Masahiko, Takagi Hidenori, Ueda Yutaka, Sugiyama Jun, Månsson Martin
Department of Applied Physics, KTH Royal Institute of Technology, Electrum 229, SE-16440, Stockholm, Kista, Sweden.
Faculty of Physics, Babes-Bolyai University, 400084, Cluj-Napoca, Romania.
Sci Rep. 2019 Feb 4;9(1):1141. doi: 10.1038/s41598-018-37844-5.
The KCrO compound belongs to a series of quasi-1D compounds with intriguing magnetic properties that are stabilized through a high-pressure synthesis technique. In this study, a muon spin rotation, relaxation and resonance (μSR) technique is used to investigate the pressure dependent magnetic properties up to 25 kbar. μSR allows for measurements in true zero applied field and hereby access the true intrinsic material properties. As a result, a refined temperature/pressure phase diagram is presented revealing a novel low temperature/high pressure (p = 21 kbar) transition from a ferromagnetic insulating to a high-pressure antiferromagnetic insulator. Finally, the current study also indicates the possible presence of a quantum critical point at p ~ 33 kbar where the magnetic order in KCrO is expected to be fully suppressed even at T = 0 K.
KCrO化合物属于一系列具有有趣磁特性的准一维化合物，这些化合物通过高压合成技术得以稳定。在本研究中，采用了μ子自旋旋转、弛豫和共振（μSR）技术来研究高达25千巴的压力依赖磁特性。μSR能够在真正的零外加场中进行测量，从而获取材料的真实本征特性。结果，给出了一个精细的温度/压力相图，揭示了从铁磁绝缘体到高压反铁磁绝缘体的新型低温/高压（p = 21千巴）转变。最后，当前研究还表明在p ~ 33千巴处可能存在量子临界点，预计在该点即使在T = 0 K时KCrO中的磁序也将被完全抑制。
