Journal Article

PUBDB-2026-01829

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Effect of off-stoichiometry on structural, transport, and magnetic properties of altermagnetic CrSb

Tiwari, A.Extern* ; Babu, P. D. ; Acet, M.Extern* ; Priolkar, K. (Corresponding author)Extern* ; Bhobe, P. (Corresponding author)Extern*

2026
Inst. Woodbury, NY

This record in other databases:  

Please use a persistent id in citations: doi:10.1103/428b-p4d5  doi:10.3204/PUBDB-2026-01829

Abstract: We investigate the effects of Cr off-stoichiometry on the structural, magnetic, thermodynamic, and electrical transport properties of the antiferromagnetic compound CrSb. Single-phase hexagonal NiAs-type structure is stabilized only in the Cr-rich regime, where excess Cr atoms preferentially occupy the interstitial trigonal bipyramidal 2⁢𝑑sites, as confirmed from the x-ray diffraction study. Synchrotron-based x-ray absorption fine-structure measurements reveal a progressive increase in local structural disorder with increasing Cr concentration, particularly within the Cr sublattice. Magnetization measurements show a pronounced low-temperature upturn in susceptibility and nonlinear field-dependent behavior, which can be consistently described by the formation of short-range magnetic clusters associated with interstitial Cr moments embedded in the antiferromagnetic CrSb matrix. Specific-heat measurements indicate a finite electronic density of states at the Fermi level with a nonmonotonic evolution of the Sommerfeld coefficient with Cr content, reflecting the interplay between electronic delocalization and disorder-induced localization. Electrical transport measurements confirm metallic conduction across all compositions and reveal the emergence of an antiferromagnetic gap at low temperatures with increasing Cr concentration. These results demonstrate a strong coupling between off-stoichiometry, local structural disorder, magnetic correlations, and charge transport in Cr$_{1+𝑥}$⁢Sband establish controlled Cr occupancy as an effective route for tuning magnetic interactions and electronic responses relevant to altermagnetic systems.

---

Contributing Institute(s):

1. FS DOOR-User (FS DOOR-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20230754 (I-20230754) (I-20230754)
3. INDIA-DESY - INDIA-DESY Collaboration (2020_Join2-INDIA-DESY) (2020_Join2-INDIA-DESY)

Experiment(s):

1. PETRA Beamline P65 (PETRA III)

Appears in the scientific report 2026

---

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

---