Related Experiment Video
Updated: Jan 10, 2026
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
Large Room-Temperature Exchange Bias in Y3Fe5O12 via Antiparallel Exchange Interaction with Magnetically Pinned
Junseok Kim1, Sang J Park1,2, Phuoc Cao Van3
1Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea.
None:
The rapid expansion of data-driven technologies has intensified demand for energy-efficient and secure information processing platforms. Insulator-based spintronic devices, which leverage quantized spin waves (magnons), offer a promising solution. Among insulating materials, yttrium iron garnet (YIG; Y3Fe5O12) is notable for its ultra-low magnetic damping; however, its exchange bias (EB) effect at room temperature remains inadequate for robust device operation. In this study, a new materials platform is developed by pairing YIG with cobalt ferrite (CFO; CoFe2O4), achieving a record-high exchange bias field (HEB) of 59 ± 4 Oe at room temperature, as determined by angular-dependent ferromagnetic resonance measurements of YIG-CFO bulk composites. This large HEB can be attributed to a strong antiparallel exchange interaction at the YIG-CFO interface. These findings indicate a promising route toward achieving strong EB effects in thin-film YIG-CFO systems and provide a straightforward materials strategy for engineering enhanced magnetic coupling in insulating systems.
More Related Videos
Related Concept Videos
01:31Ferromagnetism
03:02Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
01:30Paramagnetism
02:42Valence Bond Theory
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
01:26Diamagnetism
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....