TY  - JOUR
AU  - Ghosh, Anudeepa
AU  - Birowska, Magdalena
AU  - Ghose, Pradeepta Kumar
AU  - Rybak, Miłosz
AU  - Maity, Sujan
AU  - Ghosh, Somsubhra
AU  - Das, Bikash
AU  - Dey, Koushik
AU  - Bera, Satyabrata
AU  - Bhardwaj, Suresh
AU  - Nandi, Shibabrata
AU  - Datta, Subhadeep
TI  - Anisotropic magnetodielectric coupling in layered antiferromagnetic FePS 3
JO  - Physical review / B
VL  - 108
IS  - 6
SN  - 2469-9950
CY  - Woodbury, NY
PB  - Inst.
M1  - FZJ-2023-03648
SP  - L060403
PY  - 2023
AB  - We report anisotropic magnetodielectric coupling in layered van der Waals antiferromagnetic FePS3 (Néel temperature TN∼ 120 K) with perpendicular anisotropy. Above TN, while the dielectric response function along the c axis shows frequency-dependent relaxations, in-plane data is frequency independent and reveals a deviation from phonon-anharmonicity in the ordered state, thereby implying a connection to spin-phonon coupling known to be indicative of onset of magnetic ordering. At low temperature (below 40 K), atypical anomaly in the dielectric constant is corroborated with temperature-dependent dc and ac susceptibility. The magnetodielectric response across this anomaly differs significantly for both in-plane and out-of-plane cases. We have explained this in terms of preferential orientation of magnetic antiferromagnetic zigzag alignment, implied by the in-plane structural anisotropy as confirmed by ab initio calculations. Controlling the relative strength of magnetodielectric coupling with magnetic anisotropy opens a strategy for tracking subtle modifications of structures, such as in-plane anisotropy, with potential applications for spintronic technologies.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001240619700002
DO  - DOI:10.1103/PhysRevB.108.L060403
UR  - https://juser.fz-juelich.de/record/1015304
ER  -