摘要
We use neutron powder diffraction to investigate the magnetic and crystalline structure of Cr_(2)GaN.A magnetic phase transition is identified at T≈170 K,whereas no trace of structural transition is observed down to 6 K.Combining Rietveld refinement with irreducible representations,the spin configuration of Cr ions in Cr_(2)GaN is depicted as an incommensurate sinusoidal modulated structure characterized by a propagating vector k=(0.365,0.365,0).Upon warming up to the paramagnetic state,the magnetic order parameter closely resembles to the temperature dependence of c-axis lattice parameter,suggesting strong magneto-elastic coupling in this compound.Therefore,Cr_(2)Ga N provides a potential platform for exploration of magnetically tuned properties such as magnetoelectric,magnetostrictive and magnetocaloric effects,as well as their applications.
作者
Hui-Can Mao
Yu-Feng Li
Qing-Yong Ren
Mi-Hai Chu
Helen E.Maynard-Casely
Franz Demmel
Devashibhai Adroja
Hai-Hu Wen
Yin-Guo Xiao
Hui-Qian Luo
毛慧灿;李玉峰;任清勇;褚密海;Helen E.Maynard-Casely;Franz Demmel;Devashibhai Adroja;闻海虎;肖荫果;罗会仟(Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;National Laboratory of Solid State Microstructures and Department of Physics,Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;Spallation Neutron Source Science Center,Dongguan 523803,China;School of Advanced Materials,Shenzhen Graduate School,Peking University,Shenzhen 518055,China;Australian Centre for Neutron Scattering,Australian Nuclear Science and Technology Organisation,Lucas Heights NSW-2232,Australia;ISIS Facility,Rutherford Appleton Laboratory,Chilton,Didcot Oxon OX110QX,United Kingdom;Songshan Lake Materials Laboratory,Dongguan 523808,China)
基金
supported by the National Natural Science Foundation of China(Grant Nos.11822411,12061130200,11961160699,11974392,and 52101236)
the National Key Research and Development Program of China(Grant Nos.2018YFA0704200,2017YFA0303100,and 2020YFA0406003)
the Strategic Priority Research Program(B)of the CAS(GrantNo.XDB25000000)
K.C.Wong Education Foundation(Grant No.GJTD-2020-01)
the Youth Innovation Promotion Association of the CAS(Grant No.Y202001)
Beijing Natural Science Foundation(Grant No.JQ19002)
the Newton Advanced Fellowship funding from the Royal Society of UK(Grant No.NAFR1201248)。
