Electron holography observation of individual ferrimagnetic lattice planes

Toshiaki Tanigaki (), Tetsuya Akashi, Takaho Yoshida, Ken Harada, Kazuo Ishizuka, Masahiko Ichimura, Kazutaka Mitsuishi, Yasuhide Tomioka, Xiuzhen Yu, Daisuke Shindo, Yoshinori Tokura, Yasukazu Murakami and Hiroyuki Shinada
Additional contact information
Toshiaki Tanigaki: Hitachi, Ltd.
Tetsuya Akashi: Hitachi, Ltd.
Takaho Yoshida: Hitachi, Ltd.
Ken Harada: RIKEN Center for Emergent Matter Science (CEMS)
Kazuo Ishizuka: HREM Research Inc.
Masahiko Ichimura: Hitachi, Ltd.
Kazutaka Mitsuishi: National Institute for Materials Science
Yasuhide Tomioka: National Institute of Advanced Industrial Science and Technology (AIST)
Xiuzhen Yu: RIKEN Center for Emergent Matter Science (CEMS)
Daisuke Shindo: RIKEN Center for Emergent Matter Science (CEMS)
Yoshinori Tokura: RIKEN Center for Emergent Matter Science (CEMS)
Yasukazu Murakami: Kyushu University
Hiroyuki Shinada: Hitachi, Ltd.

Nature, 2024, vol. 631, issue 8021, 521-525

Abstract: Abstract Atomic-scale observations of a specific local area would be considerably beneficial when exploring new fundamental materials and devices. The development of hardware-type aberration correction1,2 in electron microscopy has enabled local structural observations with atomic resolution3–5 as well as chemical and vibration analysis6–8. In magnetic imaging, however, atomic-level spin configurations are analysed by electron energy-loss spectroscopy by placing samples in strong magnetic fields9–11, which destroy the nature of the magnetic ordering in the samples. Although magnetic-field-free observations can visualize the intrinsic magnetic fields of an antiferromagnet by unit-cell averaging12, directly observing the magnetic field of an individual atomic layer of a non-uniform structure is challenging. Here we report that the magnetic fields of an individual lattice plane inside materials with a non-uniform structure can be observed under magnetic-field-free conditions by electron holography with a hardware-type aberration corrector assisted by post-digital aberration correction. The magnetic phases of the net magnetic moments of (111) lattice planes formed by opposite spin orderings between Fe3+ and Mo5+ in a ferrimagnetic double-perovskite oxide (Ba2FeMoO6) were successfully observed. This result opens the door to direct observations of the magnetic lattice in local areas, such as interfaces and grain boundaries, in many materials and devices.

Date: 2024
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DOI: 10.1038/s41586-024-07673-w

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