TY - JOUR
T1 - Layered polymorph of titanium triiodide
AU - Ni, Danrui
AU - Mudiyanselage, Ranuri S.Dissanayaka
AU - Xu, Xianghan
AU - Mun, Junsik
AU - Zhu, Yimei
AU - Xie, Weiwei
AU - Cava, R. J.
N1 - Publisher Copyright:
© 2022 American Physical Society.
PY - 2022/12
Y1 - 2022/12
N2 - A previously unreported layered triangular lattice polymorph of TiI3 is described, synthesized under 6 GPa of applied pressure at 900°C, but stable at atmospheric pressure. This air-sensitive material has a CdI2-type layered structure [P-3m1 (no. 164), a=4.012Å and c=6.641Å at 120 K, Z=1 of Ti0.667I2] with an in-plane triangular lattice, related to that of TiI4 (Ti0.5I2). Although the TiI3 formula is consistent with expectations for a layered honeycomb lattice of spin 1/2 Ti(III), there is disorder in the crystal structure, and the complex magnetic behavior observed is inconsistent with a simple local moment picture of spin 1/2 per Ti(III). Magnetic susceptibility and heat capacity measurements suggest that the material undergoes several low-temperature phase transitions.
AB - A previously unreported layered triangular lattice polymorph of TiI3 is described, synthesized under 6 GPa of applied pressure at 900°C, but stable at atmospheric pressure. This air-sensitive material has a CdI2-type layered structure [P-3m1 (no. 164), a=4.012Å and c=6.641Å at 120 K, Z=1 of Ti0.667I2] with an in-plane triangular lattice, related to that of TiI4 (Ti0.5I2). Although the TiI3 formula is consistent with expectations for a layered honeycomb lattice of spin 1/2 Ti(III), there is disorder in the crystal structure, and the complex magnetic behavior observed is inconsistent with a simple local moment picture of spin 1/2 per Ti(III). Magnetic susceptibility and heat capacity measurements suggest that the material undergoes several low-temperature phase transitions.
UR - http://www.scopus.com/inward/record.url?scp=85143669632&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85143669632&partnerID=8YFLogxK
U2 - 10.1103/PhysRevMaterials.6.124001
DO - 10.1103/PhysRevMaterials.6.124001
M3 - Article
AN - SCOPUS:85143669632
SN - 2475-9953
VL - 6
JO - Physical Review Materials
JF - Physical Review Materials
IS - 12
M1 - 124001
ER -