TY - JOUR
T1 - Direct Determination of Atomic Structure and Magnetic Coupling of Magnetite Twin Boundaries
AU - Chien, Chunrin
AU - Li, Hongping
AU - Seki, Takehito
AU - Yin, Deqiang
AU - Sanchez-Santolino, Gabriel
AU - Inoue, Kazutoshi
AU - Shibata, Naoya
AU - Ikuhara, Yuichi
N1 - Funding Information:
C.C. thanks support from “Thousand Youth Talents Plan” of China, the Key Research Program of Frontier Sciences, CAS (no. QYZDY-SSW-JSC027), and the National Natural Science Foundation of China (no. 51771200). C.C. and Y. I. acknowledge the support by “Nanotechnology Platform” (no. 12024046) from MEXT and Grant-in-Aid for Specially Promoted Research (no. JP17H06094) from JSPS. We thank K. P. McKenna at University of York for valuable discussion.
Funding Information:
C.C. thanks support from Thousand Youth Talents Plan of China, the Key Research Program of Frontier Sciences, CAS (no. QYZDY-SSW-JSC027), and the National Natural Science Foundation of China (no. 51771200). C.C. and Y. I. acknowledge the support by Nanotechnology Platform (no. 12024046) from MEXT and Grant-in-Aid for Specially Promoted Research (no. JP17H06094) from JSPS. We thank K. P. McKenna at University of York for valuable discussion.
Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/3/27
Y1 - 2018/3/27
N2 - Clarifying how the atomic structure of interfaces/boundaries in materials affects the magnetic coupling nature across them is of significant academic value and will facilitate the development of state-of-the-art magnetic devices. Here, by combining atomic-resolution transmission electron microscopy, atomistic spin-polarized first-principles calculations, and differential phase contrast imaging, we conduct a systematic investigation of the atomic and electronic structures of individual Fe3O4 twin boundaries (TBs) and determine their concomitant magnetic couplings. We demonstrate that the magnetic coupling across the Fe3O4 TBs can be either antiferromagnetic or ferromagnetic, which directly depends on the TB atomic core structures and resultant electronic structures within a few atomic layers. Revealing the one-to-one correspondence between local atomic structures and magnetic properties of individual grain boundaries will shed light on in-depth understanding of many interesting magnetic behaviors of widely used polycrystalline magnetic materials, which will surely promote the development of advanced magnetic materials and devices.
AB - Clarifying how the atomic structure of interfaces/boundaries in materials affects the magnetic coupling nature across them is of significant academic value and will facilitate the development of state-of-the-art magnetic devices. Here, by combining atomic-resolution transmission electron microscopy, atomistic spin-polarized first-principles calculations, and differential phase contrast imaging, we conduct a systematic investigation of the atomic and electronic structures of individual Fe3O4 twin boundaries (TBs) and determine their concomitant magnetic couplings. We demonstrate that the magnetic coupling across the Fe3O4 TBs can be either antiferromagnetic or ferromagnetic, which directly depends on the TB atomic core structures and resultant electronic structures within a few atomic layers. Revealing the one-to-one correspondence between local atomic structures and magnetic properties of individual grain boundaries will shed light on in-depth understanding of many interesting magnetic behaviors of widely used polycrystalline magnetic materials, which will surely promote the development of advanced magnetic materials and devices.
KW - differential phase contrast
KW - first-principles calculations
KW - grain boundary
KW - magnetic coupling
KW - transmission electron microscopy
UR - http://www.scopus.com/inward/record.url?scp=85044511623&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85044511623&partnerID=8YFLogxK
U2 - 10.1021/acsnano.7b08802
DO - 10.1021/acsnano.7b08802
M3 - Article
C2 - 29480718
AN - SCOPUS:85044511623
VL - 12
SP - 2662
EP - 2668
JO - ACS Nano
JF - ACS Nano
SN - 1936-0851
IS - 3
ER -