Crystal Growth of Quantum Magnets in the Rare-Earth Pyrosilicate Family R2Si2O7 (R = Yb, Er) Using the Optical Floating Zone Method
Department of Physics, Colorado State University, 200 W. Lake St., Fort Collins, CO 80523-1875, USA
Department of Physics, 500 W. University Ave, The University of Texas at El Paso, El Paso, TX 79968, USA
Author to whom correspondence should be addressed.
Received: 23 March 2019 / Revised: 31 March 2019 / Accepted: 2 April 2019 / Published: 7 April 2019
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We report on the crystal growth of rare-earth pyrosilicates,
= Yb and Er using the optical floating zone method. The grown crystals comprise members from the family of pyrosilicates where the rare-earth atoms form a distorted honeycomb lattice. C-Yb
is a quantum dimer magnet with field-induced long range magnetic order, while D-Er
is an Ising-type antiferromagnet. Both growths resulted in multi-crystal boules, with cracks forming between the different crystal orientations. The Yb
crystals form the C-type rare-earth pyrosilicate structure with space group
and are colorless and transparent or milky white, whereas the Er-variant is D-type,
, and has a pink hue originating from Er
. The crystal structures of the grown single crystals were confirmed through a Rietveld analysis of the powder X-ray diffraction patterns from pulverized crystals. The specific heat of both C-Yb
measured down to 50 mK indicated a phase transition at
1.8 K for D-Er
and a broad Schottky-type feature with a sharp anomaly at 250 mK in an applied magnetic field of 0.8T along the c
-axis in the case of C-Yb
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Nair, H.S.; DeLazzer, T.; Reeder, T.; Sikorski, A.; Hester, G.; Ross, K.A. Crystal Growth of Quantum Magnets in the Rare-Earth Pyrosilicate Family R2Si2O7 (R = Yb, Er) Using the Optical Floating Zone Method. Crystals 2019, 9, 196.
Nair HS, DeLazzer T, Reeder T, Sikorski A, Hester G, Ross KA. Crystal Growth of Quantum Magnets in the Rare-Earth Pyrosilicate Family R2Si2O7 (R = Yb, Er) Using the Optical Floating Zone Method. Crystals. 2019; 9(4):196.
Nair, Harikrishnan S.; DeLazzer, Tim; Reeder, Tim; Sikorski, Antony; Hester, Gavin; Ross, Kate A. 2019. "Crystal Growth of Quantum Magnets in the Rare-Earth Pyrosilicate Family R2Si2O7 (R = Yb, Er) Using the Optical Floating Zone Method." Crystals 9, no. 4: 196.
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