Resonant Quantum Magnetodielectric Effect in Multiferroic Metal–Organic Framework [CH3NH3]Co(HCOO)3
Year: 2024
Type: article
Abstract: The observation of both resonant quantum tunneling of magnetization (RQTM) and resonant quantum magnetodielectric (RQMD) effect in the perovskite multiferroic metal–organic framework [CH3NH3]Co(HCOO)3.is reported. An intrinsic magnetic phase separation emerges at low temperatures due to the hydrogen‐bond‐modified long‐range super‐exchange interaction, leading to the coexistence of canted antiferromagnetic order and single‐ion (Co2+) magnets. Subsequently, a stair‐shaped magnetic hysteresis loop along the [101] direction characterizing the RQTM appears below the magnetic blocking temperature. More interestingly, the magnetic field dependence of dielectric permittivity exhibits pronounced peaks at the critical fields corresponding to the RQTM, a phenomenon termed the RQMD effect which enables electrical detection of the RQTM. The magnetostriction shows a similar behavior to the magnetodielectric effect at 2 and 5 K, which suggests that the magnetodielectric effect in this multiferroic metal–organic framework is related to the spin‐lattice coupling.
Source: Small
Institution: Chongqing University
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4405797837