Imaging magnetism evolution of magnetite to megabar pressure range with quantum sensors in diamond anvil cell

• URL: http://arxiv.org/abs/2306.07840v1
• Date: Tue, 13 Jun 2023 15:19:22 GMT
• Title: Imaging magnetism evolution of magnetite to megabar pressure range with quantum sensors in diamond anvil cell
• Authors: Mengqi Wang, Yu Wang, Zhixian Liu, Ganyu Xu, Bo Yang, Pei Yu, Haoyu Sun, Xiangyu Ye, Jingwei Zhou, Alexander. F. Goncharov, Ya Wang and Jiangfeng Du
• Abstract summary: We develop an in-situ magnetic detection technique at megabar pressures with high sensitivity and sub-microscale spatial resolution. We observe the macroscopic magnetic transition of Fe3O4 in the megabar pressure range from strong ferromagnetism (alpha-Fe3O4) to weak ferromagnetism (beta-Fe3O4) and finally to non-magnetism (gamma-Fe3O4) The presented method can potentially investigate the spin-orbital coupling and magnetism-superconductivity competition in magnetic systems.
• Score: 57.91882523720623
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: High-pressure diamond anvil cells have been widely used to create novel states of matter. Nevertheless, the lack of universal in-situ magnetic measurement techniques at megabar pressures makes it difficult to understand the underlying physics of materials' behavior at extreme conditions, such as high-temperature superconductivity of hydrides and the formation or destruction of the local magnetic moments in magnetic systems, etc. Here we break through the limitations of pressure on quantum sensors and develop the in-situ magnetic detection technique at megabar pressures with high sensitivity (~1{\mu}T/Hz^(1\2)) and sub-microscale spatial resolution. By directly imaging the magnetic field and the evolution of magnetic domains, we observe the macroscopic magnetic transition of Fe3O4 in the megabar pressure range from strong ferromagnetism ({\alpha}-Fe3O4) to weak ferromagnetism ({\beta}-Fe3O4) and finally to non-magnetism ({\gamma}-Fe3O4). The scenarios for magnetic changes in Fe3O4 characterized here shed light on the direct magnetic microstructure observation in bulk materials at high pressure and contribute to understanding the mechanism of magnetic moment suppression related to spin crossover. The presented method can potentially investigate the spin-orbital coupling and magnetism-superconductivity competition in magnetic systems.

Related papers

• Revealing Emergent Magnetic Charge in an Antiferromagnet with Diamond Quantum Magnetometry [42.60602838972598]
  Whirling topological textures play a key role in exotic phases of magnetic materials and offer promise for logic and memory applications. In antiferromagnets, these textures exhibit enhanced stability and faster dynamics with respect to ferromagnetic counterparts. One technique that meets the demand of highly sensitive vectorial magnetic field sensing with negligible backaction is diamond quantum magnetometry.
  arXiv  Detail & Related papers  (2023-03-21T18:30:20Z)
• Nanoscale magnetism probed in a matter-wave interferometer [0.0]
  We study alkali atoms, organic radicals and fullerenes in the same device, with magnetic moments ranging from a Bohr magneton to less than a nuclear magneton. We find evidence for magnetization of a supersonic beam of organic radicals and, most notably, observe a strong magnetic response of a thermal C$_60$ beam consistent with high-temperature atom-like deflection of rotational magnetic moments.
  arXiv  Detail & Related papers  (2022-03-22T16:42:48Z)
• AC susceptometry of 2D van der Waals magnets enabled by the coherent control of quantum sensors [4.103177660092151]
  We coherently control the NV center's spin precession to achieve ultra-sensitive ac susceptometry of a 2D ferromagnet. We show that domain wall mobility is enhanced in ultrathin CrBr3, with minimal decrease for frequencies exceeding hundreds of kilohertz. Our technique extends NV magnetometry to the multi-functional ac and dc magnetic characterization of wide-ranging spintronic materials at the nanoscale.
  arXiv  Detail & Related papers  (2021-05-17T17:28:46Z)
• Surpassing the Energy Resolution Limit with ferromagnetic torque sensors [55.41644538483948]
  We evaluate the optimal magnetic field resolution taking into account the thermomechanical noise and the mechanical detection noise at the standard quantum limit. We find that the Energy Resolution Limit (ERL), pointed out in recent literature, can be surpassed by many orders of magnitude.
  arXiv  Detail & Related papers  (2021-04-29T15:44:12Z)
• Spin Entanglement and Magnetic Competition via Long-range Interactions in Spinor Quantum Optical Lattices [62.997667081978825]
  We study the effects of cavity mediated long range magnetic interactions and optical lattices in ultracold matter. We find that global interactions modify the underlying magnetic character of the system while introducing competition scenarios. These allow new alternatives toward the design of robust mechanisms for quantum information purposes.
  arXiv  Detail & Related papers  (2020-11-16T08:03:44Z)
• Picoscale Magnetoelasticity Governs Heterogeneous Magnetic Domains in a Noncentrosymmetric Ferromagnetic Weyl Semimetal [0.0]
  We use a scanning SQUID microscope to image spontaneous magnetization and magnetic susceptibility of CeAlSi. metastable domains embody a type of frustrated or glassy magnetic phase, with excitations that may be of an emergent and exotic nature. We show how these domains form, how they interact, and how they can be manipulated or stabilized with estimated lattice strains on picometer levels.
  arXiv  Detail & Related papers  (2020-11-12T02:26:07Z)
• Photon Condensation and Enhanced Magnetism in Cavity QED [68.8204255655161]
  A system of magnetic molecules coupled to microwave cavities undergoes the equilibrium superradiant phase transition. The effect of the coupling is first illustrated by the vacuum-induced ferromagnetic order in a quantum Ising model. A transmission experiment is shown to resolve the transition, measuring the quantum electrodynamical control of magnetism.
  arXiv  Detail & Related papers  (2020-11-07T11:18:24Z)
• Ferromagnetic Gyroscopes for Tests of Fundamental Physics [49.853792068336034]
  A ferromagnetic gyroscope (FG) is a ferromagnet whose angular momentum is dominated by electron spin polarization and that will precess under the action of an external torque. We model and analyze FG dynamics and sensitivity, focusing on practical schemes for experimental realization.
  arXiv  Detail & Related papers  (2020-10-17T07:13:50Z)
• Magnetic domains and domain wall pinning in two-dimensional ferromagnets revealed by nanoscale imaging [1.614014297785306]
  We employ cryogenic scanning magnetometry using a single-electron spin of a nitrogen-vacancy center in a diamond probe to unambiguously prove the existence of magnetic domains. The high spatial resolution of this technique enables imaging of magnetic domains and allows to resolve domain walls pinned by defects.
  arXiv  Detail & Related papers  (2020-09-28T16:07:07Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.