The crystal structure and magnetic, electronic, and thermal properties of a NdSbTe single crystal were examined by X-ray diffraction, magnetic and specific heat C p (T) measurements, and density functional theory (DFT) calculations. NdSbTe undergoes an antiferromagnetic ordering at T N ≈ 2.9 K, which is obviously shown from χ(T) and C p (T). With increasing H, a spinflop transition is induced along the c axis, and subsequently AFM disappeared at H ≤ 0.4 T and H ≤ 2.5 T along H||c and H||ab, respectively. This remarkable observation shows that the ordered Nd 3+ moments lie in the c axis and that there is the existence of an anisotropy scenario. The estimated magnetic anisotropy with χ ||c (0.63)/χ ||ab (0.036) is 17.5 at temperature 1.8 K. An analysis of specific heat capacity reveals the significant contribution of crystal field effects at high temperature. We carried out DFT calculations to predict the magnetic ground state and the electronic properties of NdSbTe. Our calculations revealed that the magnetic ground state is AFM with spins aligned ferromagnetically along the b axis and antiferromagnetically along the c axis. The calculated electronic band of NdSbTe exhibits a Dirac semimetal material nature.

The layered, lead-free hybrid perovskites are superior in organic electronics compared to their three-dimensional (3D) counterparts due to their facile synthesis and promising stability to various environmental conditions. To learn more about the multifunctional side of such materials, a layered perovskite (EDA)­CuCl4 [EDA is (CH2)2(NH3)2] crystal was grown in solution and crystallographically characterized by single-crystal X-ray diffraction. The crystal is thermally very stable and exhibits a high reversible thermochromic working temperature (∼503 K), intense conductivity changes with temperature, and strong exotic magnetic properties. The structural changes of the crystal with temperature are monitored and explained by powder X-ray diffraction and UV–vis absorption. The absorption band of the crystal shows little variation after repeated heating/cooling cycles, indicating admirable stability. Moreover, the Cu hybrid consists of a strong ferromagnetic interaction in antiferromagnetically coupled layers with a Néel temperature of about 34 K. The magnetocaloric effect of the crystal was investigated and found to be inverse due to the magnetic entropy change associated with the antiferromagnetic transition and the strong ferromagnetic interaction, indicating the suitability of the perovskite hybrid as a candidate for an environmentally friendly low-temperature magnetic cooling technology. The overall results promise a potential multipurpose two-dimensional (2D) perovskite for future electronic applications in a wide temperature range.

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