Manipulating non-collinear antiferromagnetic order and thermal expansion behaviors in triangular lattice Mn_(3)Ag_(1-x)Sn(Ge)_(x)N  

作　　者：Dongmei Hu Sihao Deng Ying Sun Kewen Shi Xiuliang Yuan Shihai An Lunhua He Jie Chen Yuanhua Xia Cong Wang 

机构地区：[1]School of Physics,Beihang University,Beijing,100191,China [2]School of Integrated Circuit Science and Engineering,Beihang University,Beijing,100191,China [3]National Key Lab of Spintronics,Institute of International Innovation,Beihang University,Yuhang District,Hangzhou,311115,China [4]Spallation Neutron Source Science Center,Dongguan,523803,China [5]Institute of High Energy Physics,Chinese Academy of Sciences,Beijing,100049,China [6]Institute of Physics,Chinese Academy of Sciences,Beijing,100190,China [7]Songshan Lake Materials Laboratory,Dongguan,523808,China [8]Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Mianyang,621999,China

出　　处：《Journal of Materiomics》2024年第2期456-462,共7页无机材料学学报（英文）

基　　金：supported by the financial support of National Key R&D Program of China(2022YFA1402600);National Natural Science Foundation of China(NSFC)(52272264);Sino-German Mobility Programme Project(M-0273);the Guangdong Basic and Applied Basic Research Foundation(2022A1515140117).

摘　　要：Magnetic materials with non-collinear spin orderings provide an outstanding platform to probe spin-tronic phenomena owing to their strong spin-orbit coupling(SOC)and unique Berry phase.It is thus important to obtain a non-collinear antiferromagnetic(AFM)phase at room temperature(RT).Signifi-cantly,the discovery of novel materials with nearly zero thermal expansion(ZTE)property near RT is required and pursued for avoiding thermal stress and fracture in spintronic devices.Herein,the doping of Sn(Ge)at the Ag site in the triangular lattice Mn_(3)Ag_(1-x)Sn(Ge)_(x)N compounds increases effectively the Neel point and makes the interesting non-collinearГ^(5g)AFM phase exist above RT.The magnetic phase diagrams withГ^(5g)phase up to 498 K were built by the combined analysis of neutron powder diffraction(NPD),magnetic measurements,electronic transport,and differential scanning calorimetry(DSC).The thermal expansion behaviors of Mn_(3)Ag_(1-x)Sn(Ge)_(x)N were modulated,and the nearly ZTE above RT was achieved in Mn_(3)Ag_(0.5)Ge_(0.5)N withinГ^(5g)AFM ordering.Our findings offer an effective way to tailor the non-collinear AFM ordering and correlated thermal expansion behavior for potential use in the emerging field of thermal stress-free magnetic chip materials.

关 键 词：Non-collinear magnet Antiferromagnetic spintronics Nearly zero thermal expansion Neutron powder diffraction ANTIPEROVSKITE 

分 类 号：TQ17[化学工程—硅酸盐工业]