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Open Access Publications from the University of California

Imaging stress and magnetism at high pressures using a nanoscale quantum sensor.

  • Author(s): Hsieh, S
  • Bhattacharyya, P
  • Zu, C
  • Mittiga, T
  • Smart, TJ
  • Machado, F
  • Kobrin, B
  • Höhn, TO
  • Rui, NZ
  • Kamrani, M
  • Chatterjee, S
  • Choi, S
  • Zaletel, M
  • Struzhkin, VV
  • Moore, JE
  • Levitas, VI
  • Jeanloz, R
  • Yao, NY
  • et al.

Pressure alters the physical, chemical, and electronic properties of matter. The diamond anvil cell enables tabletop experiments to investigate a diverse landscape of high-pressure phenomena. Here, we introduce and use a nanoscale sensing platform that integrates nitrogen-vacancy (NV) color centers directly into the culet of diamond anvils. We demonstrate the versatility of this platform by performing diffraction-limited imaging of both stress fields and magnetism as a function of pressure and temperature. We quantify all normal and shear stress components and demonstrate vector magnetic field imaging, enabling measurement of the pressure-driven [Formula: see text] phase transition in iron and the complex pressure-temperature phase diagram of gadolinium. A complementary NV-sensing modality using noise spectroscopy enables the characterization of phase transitions even in the absence of static magnetic signatures.

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