Journal Article

PUBDB-2026-00314

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Stability of the collinear up-up-down-down magnetic ordering in Ca$_3$CoMnO$_6$

Pal, P. ; Patra, K. ; Nandy, S.Extern*DESY* ; Mahana, S.Extern* ; Dey, J. K.DESY* ; Chatterjee, S.Extern* ; Prajapat, C. L. ; Paramanik, T. ; Topwal, D.Extern* ; Das, A. ; Mahadevan, P. ; Choudhury, D. (Corresponding author)Extern*

2025
Inst. Woodbury, NY

This record in other databases:  

Please use a persistent id in citations: doi:10.1103/j9r9-9h3q  doi:10.3204/PUBDB-2026-00314

Abstract: Ca$_3$CoMnO$_6$ −xMnxO6 is a quasi-one-dimensional Ising chain magnet with a unique collinear up-up-down-down(↑↑↓↓) magnetic ordering, that gives rise to ferroelectricity below the Néel temperature of 13 K. This uniquelong-range magnetic ordering, however, was argued to get stabilized only with Co excess (i.e., x < 1.0) nonstoichiometric Ca$_3$CoMnO$_6$ , and not so for the chemically stoichiometric compound x = 1.0. Combining severalexperiments along with first-principles density-functional-based calculations, we elucidate that this unique↑↑↓↓ magnetic ordering can be stabilized even in the stoichiometric Ca$_3$CoMnO$_6$ (i.e., x = 1.0) compound,albeit through the presence of optimum cationic positional disorder, where some Mn and Co ions occupy thetrigonal-prismatic (Co sites for the ordered case) and octahedral (Mn-sites for the ordered one) sites respectivelythrough relative tuning of the various magnetic exchange interactions. Specifically, the relative energy stabilityof the ↑↑↓↓ magnetic order in Ca3$_3$CoMnO$_6$ exhibits a nonmonotonic dependency on the extent of cationicdisorder with a maximum of around 16% disorder. Thus our study helps to elucidate the mechanism thatleads to stabilization of this unique functional ↑↑↓↓ magnetic ordering in this promising class of multiferroiccompounds.

---

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 P64 (PETRA III)

Appears in the scientific report 2025

---

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

---