Giant magnetostriction and nonsaturating electric polarization up to 60 T in the polar magnet $$\mathrm{CaBaCo_4O_7}$$
Journal Article
·
· Physical Review. B
- Chongqing University, Chongqing (China)
- Chinese Academy of Sciences (CAS), Beijing (China)
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). National High Magnetic Field Laboratory (MagLab)
- Chongqing University, Chongqing (China); Chinese Academy of Sciences (CAS), Beijing (China)
Giant magnetostriction in insulating magnetic materials is highly required for applications but is rarely observed. Here we show that giant magnetostriction (> 1500 ppm) can be achieved in an insulating transition metal oxide CaBaCo4O7 where the ferrimagnetic ordering at Tc ~ 62K is associated with a huge change in the lattice. Moreover, because this material is pyroelectric with a nonswitchable electric polarization (P), the giant magnetostriction results in a pronounced magnetoelectric effect—a huge change of electric polarization (ΔP ~ 1.6μC/cm2) in response to the applied magnetic field up to 60 T. Geometric frustration as well as the orbital instability of Co2+/Co3+ ions is believed to play a crucial role in the giant magnetostriction. Here our study provides insights on how to achieve both giant magnetostriction and pronounced magnetoelectric effect in insulating transition metal oxides.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- Beijing Natural Science Foundation; National Natural Science Foundation of China; State of Florida; USDOE Office of Science (SC)
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1992255
- Report Number(s):
- LA-UR-21-25367
- Journal Information:
- Physical Review. B, Journal Name: Physical Review. B Journal Issue: 17 Vol. 103; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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