Abstract
We study the magnetism in NdFe2Ga8 by the neutron-diffraction and temperature-modulated linear Grüneisen parameter measurements. Previous thermodynamical measurements have demonstrated that there are two magnetic transitions at 10 and 14.5 K, respectively. Neutron-diffraction measurements confirm that the lower one is an antiferromagnetic (AFM) transition with a commensurate magnetic structure. Both the commensurate and the incommensurate (IC) magnetic peaks are found below the higher transition but their intensities only gradually increase with decreasing temperature. Below 10 K, the commensurate peak intensity increases quickly with decreasing temperature, signaling the AFM transition, while the IC peak intensity disappears below 5 K. The linear Grüneisen parameter along the c axis, Γc, shows a hysteresis behavior that is different from the hysteresis behavior for the magnetization M. We give a discussion of the origin of the magnetism in NdFe2Ga8.
| Original language | English |
|---|---|
| Article number | 035152 |
| Journal | Physical Review B |
| Volume | 105 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jan 15 2022 |
Funding
This work is supported by the National Key R&D Program of China (Grants No. 2020YFA0406003, No. 2017YFA0302900, No. 2017YFA0303100, No. 2016YFA0300502, and No. 2016YFA0300604), the National Natural Science Foundation of China (Grants No. 11874401, No. 11674406, No. 11961160699, No. 11774399, and No. U2032204), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB33010000), the Beijing Natural Science Foundation (Z180008), and the K.C. Wong Education Foundation (GJTD-2020-01, GJTD-2018-01). The single-crystal neutron diffraction experiment on TOPAZ used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory, USA.