Journal Article

PUBDB-2025-05341

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Interplay of Jahn–Teller Distortion and Ionic Substitution: Probing Multifunctional Properties in Alkaline‐Earth Hole Doped DyMnO$_3$ Multiferroics

Mitra, R. ; Prusty, A. ; Gloskovskii, A.DESY* ; Topwal, D.Extern* ; Manju, U. (Corresponding author)

2025
Wiley-VCH Weinheim

This record in other databases:  

Please use a persistent id in citations: doi:10.1002/pssa.202500366

Abstract: Herein, a comprehensive investigation into the effect of alkaline-earth hole doping on the structural, thermal, and electronic properties of Dy$_{0.6}$A$_{0.4}$MnO$_3$ (A = Ca, Sr, and Ba) multiferroics is reported. Room-temperature X-ray diffraction confirms that all samples retain the orthorhombic perovskite structure (Pbnm), with subtle lattice distortions induced by ion substitution. Thermal analyses show that Sr doping exhibits an anomalous mass loss of 4.8% between 100 and 1000 °C along with a reduced crystallization enthalpy (0.43 J g$^{−1}$) relative to the Ca and Ba-substituted compounds. Phase-field simulations, based on a classical double-well potential coupled with a gradient energy term, capture the evolution of crystalline domains and yield crystallization enthalpies which validate the experimental trend. Hard X-ray photoelectron spectroscopy confirms the coexistence of mixed Mn$^{3+}$/Mn$^{4+}$ states, effecting a partial transformation of Jahn–Teller active Mn3+ ions into non-Jahn–Teller Mn4+ ions while zeta potential measurements reveal surface charges of 22.2 (Ca), 16.1 (Sr), and 21.4 mV (Ba), reflecting differences in colloidal stability. These results demonstrate that Sr substitution engenders a unique stabilization mechanism, likely due to the coordination mismatch between the small eightfold coordinated Dy3+ and the slightly larger 12-fold coordinated Sr$^{2+}$, thereby offering a tunable route for optimizing the multifunctional properties of multiferroic oxides.

Note: Waiting for fulltext

---

Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. PETRA-S (FS-PETRA-S)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. INDIA-DESY - INDIA-DESY Collaboration (2020_Join2-INDIA-DESY) (2020_Join2-INDIA-DESY)

Experiment(s):

1. PETRA Beamline P22 (PETRA III)

Appears in the scientific report 2025

---

Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---