Spin induced exchange bias and lattice modulation in Nd1−xEuxCrO3. (1st February 2021)

• Record Type: Journal Article
• Authors: Gupta, Pragya; Pal, D
• Is Part Of: Journal of physics. Volume 33:Number 13(2021)
• Publication Date: 2021-02-01
• Subjects: orthochromites -- spin-reorientation -- exchange bias -- spin–phonon coupling; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/abda7d
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: We report the evolution of coupled phonons and exchange bias ( EB ) in perovskite-type Nd1− x Eu x CrO3 ( x = 0.0, 0.05, and 0.10) samples by means of temperature-dependent Raman spectroscopy and dc magnetization measurements. We observed a non-monotonic behavior of the EB field around the temperature T *, which lies between the antiferromagnetic ordering temperature ( T N ) and spin-reorientation transition temperature ( T SR ). The temperature dependence of phonon modes related to antistretching and bending of CrO6 octahedra and Nd 3+ /Eu 3+ ion vibration below T N confirms the strong spin–phonon coupling. The T * found from the non-monotonicity of the EB is imprinted with the additional anomaly observed in the low-temperature spin–phonon behavior. The phonon modes and phonon anomaly are also verified using the density functional theory-based calculations.