Absence of long-range magnetic order in lithium-containing honeycombs in the Li-Cr-Sb(Te)-O phases

H. Cein Mandujano, Sandra L. Gonzalez, Nathan Episcopo, Uma Sitharaman, Narayan Poudel, Krzysztof Gofryk, Yahir E. Garay, Jorge A. Lopez, Qiang Zhang, Stuart Calder, Harikrishnan S. Nair

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Li3((LiCr)(Te/Sb))O6 compounds where Cr atoms along with Li and Te or Sb are part of a honeycomb and are studied using magnetic susceptibility, specific heat, x-ray photoelectron spectroscopy and neutron diffraction. The oxides stoichiometries as determined from the neutron diffraction studies are Li4.47Cr0.53TeO6 and Li3.88Cr1.12SbO6 with a stable oxidation state of +3 for Cr. Both the compounds crystallize in space group C2/m with intermixing of cations at the 4g sites leaving the 2a sites preferentially for Te or Sb. Again, the Li+ ions alone predominantly occur in the interlayer sites. Both the compounds show a broad anomaly in specific heat at 8 K, which is robust against 8 T. A corresponding anomaly is absent in the magnetic susceptibility but recovers from its derivative, dχ(T)/dT. We ascertain the magnetic anomaly temperatures (T a ) of Li4.47Cr0.53TeO6 and Li3.88Cr1.12SbO6 as 5.9 K and 6.7 K respectively from specific heat. Although the physical properties indicated a low temperature anomaly, neutron diffraction data did not reveal a magnetic signal or a structural anomaly down to 1.5 K. This rules out a conventional long-range ordered magnetic ground state in either compounds. Combining the results from specific heat, neutron diffraction and electron paramagnetic resonance, we put forth a scenario of depleted honeycomb lattice of Cr3+ with predominant short-range magnetic correlations as the magnetic ground states of the title compounds.

Original languageEnglish
Article number295802
JournalJournal of Physics Condensed Matter
Volume33
Issue number29
DOIs
StatePublished - Jul 2021

Funding

HSN thanks Eppley Foundation for supporting this research through the award 20190392. SLG and NE thank UTEP for a travel award to perform neutron diffraction experiments at Oak Ridge National Laboratory. The x-ray Core Facility at UTEP is acknowledged for supporting powder diffraction experiments.KGacknowledges support from the DOE s Early Career Research Program. NP acknowledges support from INL s LDRD program (19P45-019FP). The authors wish to thank the Analytical ResourcesCore at Colorado State University for instrument access, training and assistance with sample analysis. This research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory.

Fingerprint

Dive into the research topics of 'Absence of long-range magnetic order in lithium-containing honeycombs in the Li-Cr-Sb(Te)-O phases'. Together they form a unique fingerprint.

Cite this