In:
Journal of Physics: Condensed Matter, IOP Publishing, Vol. 34, No. 6 ( 2022-02-09), p. 065801-
Abstract:
We report a systematic study of the magnetic phase diagram in the H – T plane, negative magnetization (NM), exchange interactions and field-induced spin–flop transitions in the distorted perovskite Y 1− x Ce x CrO 3 . Locked AFM and weak-FM configurations in Γ 4 ( G z , F y , A x ) phase of YCrO 3 ( S = 3/2 ground state) unlocks into the Γ 2 ( F z , G y , C x ; F z R , C x R ) phase of the canted AFM and FM structures with the dilute substitution of Ce ( x ⩾ 0.05). The asymmetric and symmetric exchange interaction ( J AS ∼ 0.11 meV and J S ∼ 0.85 meV) between the trivalent Ce and Cr enable the positive quartic-anisotropy field ( H K 4 ∼ 2.85 × 10 2 Oe) along with the second order anisotropy field ( H K 2 ∼ 5.93 × 10 2 Oe). Unlike the pristine YCrO 3 compound, the Ce incorporated system exhibits a giant fourth-order anisotropy constant ( K 4 = 1.35 × 10 5 erg/c.c.) due to the asymmetric exchange interaction between the trivalent Ce–Cr which further lifts the free energy of the system and causes lag in the onset of AFM ordering showing the significant thermal hysteresis (Δ T ∼ 10 K) in the field-cooled (FC)-warming measurement protocol as compared to the FC-cooling mode. The H–T phase diagram, mapped from the isothermal magnetization data and differential magnetic susceptibility data with different measurement protocols clearly distinguishes three prominent regions below the T N (∼150 K), viz (i) long-range canted AFM + weak FM phase (Γ 4 ( G z , F y , A x )), (ii) Γ 24 mixed phase and (iii) robust Γ 2 ( F z , G y , C x ; F z R , C x R ) AFM + FM phases. Tunable spin–flopped transition (∼ 30 kOe), significant negative exchange-bias field ( H EB ∼ 2.5 kOe), huge coercive field ( H C ∼ 22 kOe) and large NM (Δ M ∼ 280 emu/mole) are the unique characteristic features of the current investigated system.
Type of Medium:
Online Resource
ISSN:
0953-8984
,
1361-648X
DOI:
10.1088/1361-648X/ac3453
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2022
detail.hit.zdb_id:
1472968-4
detail.hit.zdb_id:
228975-1
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