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Phase separation and zero thermal expansion in antiperovskite Mn₃Zn$_{0.77}$Mn$_{0.19}$N$_{0.94}$ : An in situ neutron diffraction investigation

Deng, Sihao; Sun, Ying; Wu, Hui; Shi, Zaixing; Wang, Lei; Yan, Jun; Shi, Kewen; Hu, Pengwei; Diao, Xungang; Huang, Qingzhen; Sürgers, Christoph; Wang, Cong

The antiperovskite Mn₃Zn$_{0.77}$Mn$_{0.19}$N$_{0.94}$ was investigated by in situ neutron powder diffraction (NPD) in the temperature region 5-300 K. Here, a noncollinear-antiferromagnetic/collinear-ferrimagnetic phase separation (PS) showing different lattice parameters was firstly revealed in antiperovskites. The NPD results prove that the noncollinear antiferromagnetic phase, even coexisting with the collinear ferrimagnetic phase, could be responsible for the zero thermal expansion behavior of Mn₃Zn$_{0.77}$Mn$_{0.19}$N$_{0.94}$ below 110 K. These findings suggest that Mn₃ZnN based materials could open a new avenue for further exploring the noncollinear magnetic PS and correlated physical properties of antiperovskites.

Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 1359-6462, 1872-8456
KITopen ID: 1000076249
Erschienen in Scripta materialia
Band 146
Seiten 18-21
Vorab online veröffentlicht am 03.11.2017
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