Journal Article

PUBDB-2020-00547

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Modulations in magnetostructural coupling in C and Sn deficient $Mn_{3}SnC$

Gaonkar, V. N. ; Dias, E. T.Extern* ; Das, A. ; Nigam, A. K. ; Priolkar, K. R. (Corresponding author)

2019
North-Holland Publ. Co. Amsterdam

This record in other databases:      

Please use a persistent id in citations: doi:10.1016/j.jmmm.2019.165357  doi:10.3204/PUBDB-2020-00547

Abstract: The structural and magnetic interactions in stoichiometric (Mn3SnC), carbon deficient (Mn3Sn) and tin deficient (Mn3C) antiperovskite compounds are studied using X-ray absorption fine structure spectroscopy and neutron diffraction. The study confirms the presence of local structural distortions only around Mn atoms in the antiperovskite compounds irrespective of their stoichiometry. The distortions in the Mn6C octahedra are such that only Mn atoms are displaced from their crystallographic positions resulting in long and short Mn–Mn bonds. These long and short Mn–Mn bonds are responsible for the presence of ferromagnetic and antiferromagnetic moments on Mn atoms. The C deficiency at the center of the octahedra increases the strain on the Mn6C octahedra and results in a wide variation of Mn–Mn bond distances as a function of temperature and large hysteresis in magnetic properties. On the other hand, Sn deficiency tends to relax strain by giving more space for the octahedra to distort leading to temperature independent Mn–Mn bond distances.

Note: © Elsevier B.V.

---

Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (POF3-622) (POF3-622)
2. 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 2019

---

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

---