Local Magnetic Susceptibility Measurements of Thin Films of Spin Liquid Candidate TbInO₃

Spin liquids are characterized by the presence of magnetic fluctuations and the absence of long-range order, even at the lowest temperatures where magnetic interactions typically lead to spin ordering or freezing. Recently, TbInO­₃ has been reported as a candidate to realize a highly frustrated spin liquid^[1],[2]. A transition to a magnetically ordered state typically results in distinct features in the temperature and frequency dependence of the magnetic susceptibility. Conversely, the absence of such features in the magnetic susceptibility suggests that no magnetic order is present. Previous measurements^[1],[2] of the magnetic susceptibility in bulk TbInO­₃ crystals report a lack of magnetic ordering down to 450mK. In this work, we use scanning superconducting quantum interference device (SQUID) susceptometry as a local probe to measure the temperature dependent magnetic susceptibility of TbInO­₃ thin films grown by molecular beam epitaxy (MBE) down to 40mK.

[1] Nat. Phys. 15, 262–268 (2019).

[2] Phys. Rev. X. 9, 031005 (2019).