Dynamic Cantilever Magnetometry of Paramagnetism with Slow Relaxation
Zhiyu Ma1,2, Kun Fan3, Qi Li1,2, Feng Xu1, Lvkuan Zou1*, Ning Wang1, Li-Min Zheng3*, and Fei Xue1*
1Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China 2Science Island Branch, Graduate School, University of Science and Technology of China, Hefei 230026, China 3State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
Abstract：Dynamic cantilever magnetometry is a sensitive method that has been widely used in studying magnetic anisotropy in ferromagnetic materials and Fermi surface in quantum materials. We study a cobalt-iridium metal-metalloligand coordination polymer using dynamic cantilever magnetometry. The experimental data of dynamic cantilever magnetometry are well explained using the proposed model for Langevin paramagnetism with slow relaxation. Based on the proposed model, we calculate the magnetization and magnetic susceptibility of paramagnetic materials from frequency shifts of a cantilever. The extracted magnetization and magnetic susceptibility are consistent with those obtained from conventional DC and AC magnetometry. The proposed slow relaxation picture is probably a general model for explaining dynamic cantilever magnetometry data of paramagnetic materials, including previously observed dynamic cantilever magnetometry data of paramagnetic metals [Gysin et al. 2011 Nanotechnology22 285715].
Chen L, Yu F, Xiang Z, Asaba T, Tinsman C, Lawson B, Sass P M, Wu W, Kang B L, Chen X, and Li L 2018 Phys. Rev. Appl.9 024005
[11]
Li G, Xiang Z, Yu F, Asaba T, Lawson B, Cai P, Tinsman C, Berkley A, Wolgast S, Eo Y S, Kim D J, Kurdak C, Allen J W, Sun K, Chen X H, Wang Y Y, Fisk Z, and Li L 2014 Science346 1208
[12]
Moll P J W, Potter A C, Nair N L, Ramshaw B J, Modic K A, Riggs S, Zeng B, Ghimire N J, Bauer E D, Kealhofer R, Ronning F, and Analytis J G 2016 Nat. Commun.7 12492
[13]
Modic K A, Bachmann M D, Ramshaw B J, Arnold F, Shirer K R, Estry A, Betts J B, Ghimire N J, Bauer E D, Schmidt M, Baenitz M, Svanidze E, McDonald R D, Shekhter A, and Moll P J W 2018 Nat. Commun.9 3975
[14]
Semeghini G, Levine H, Keesling A, Ebadi S, Wang T T, Bluvstein D, Verresen R, Pichler H, Kalinowski M, Samajdar R, Omran A, Sachdev S, Vishwanath A, Greiner M, Vuletić V, and Lukin M D 2021 Science374 1242
2022, Vol. 39 
