title: Magnetic Ground States of the Rare-Earth Tripod Kagome Lattice Mg_{2}RE_{3}Sb_{3}O_{14} (RE=Gd,Dy,Er).
abstract: We present the structural and magnetic properties of a new compound family, Mg_{2}RE_{3}Sb_{3}O_{14} (RE=Gd,Dy,Er), with a hitherto unstudied frustrating lattice, the "tripod kagome" structure. Susceptibility (ac, dc) and specific heat exhibit features that are understood within a simple Luttinger-Tisza-type theory. For RE=Gd, we found long-ranged order (LRO) at 1.65 K, which is consistent with a 120° structure, demonstrating the importance of diople interactions for this 2D Heisenberg system. For RE=Dy, LRO at 0.37 K is related to the "kagome spin ice" physics for a 2D system. This result shows that the tripod kagome structure accelerates the transition to LRO predicted for the related pyrochlore systems. For RE=Er, two transitions, at 80 mK and 2.1 K are observed, suggesting the importance of quantum fluctuations for this putative XY system.
authors.affiliation: Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996-1200, USA.
authors.forename: Z L
authors.initials: ZL
authors.lastname: Dun
authors.affiliation: Department of Physics, University of California, Santa Cruz, California 95064, USA.
authors.forename: J
authors.initials: J
authors.lastname: Trinh
authors.affiliation: Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People's Republic of China.|Center for High Pressure Science and Technology Advanced Research, Beijing 100094, People's Republic of China.
authors.forename: K
authors.initials: K
authors.lastname: Li
authors.affiliation: Department of Physics, Florida State University, Tallahassee, Florida 32306-3016, USA.|National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310-3706, USA.
authors.forename: M
authors.initials: M
authors.lastname: Lee
authors.affiliation: National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310-3706, USA.
authors.forename: K W
authors.initials: KW
authors.lastname: Chen
authors.affiliation: National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310-3706, USA.
authors.forename: R
authors.initials: R
authors.lastname: Baumbach
authors.affiliation: Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People's Republic of China.
authors.forename: Y F
authors.initials: YF
authors.lastname: Hu
authors.affiliation: Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People's Republic of China.
authors.forename: Y X
authors.initials: YX
authors.lastname: Wang
authors.affiliation: National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310-3706, USA.
authors.forename: E S
authors.initials: ES
authors.lastname: Choi
authors.affiliation: Department of Physics, University of California, Santa Cruz, California 95064, USA.
authors.forename: B S
authors.initials: BS
authors.lastname: Shastry
authors.affiliation: Department of Physics, University of California, Santa Cruz, California 95064, USA.
authors.forename: A P
authors.initials: AP
authors.lastname: Ramirez
authors.affiliation: Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996-1200, USA.|National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310-3706, USA.
authors.forename: H D
authors.initials: HD
authors.lastname: Zhou