| High pressure synthesis and characterization of the pyrochlore Dy2Pt2O7:A new spin ice material |
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| 作者姓名： | 崔琦 蔡云麒 李翔 顿志凌 孙培杰 周建十 周海东 程金光 |
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| 作者单位： | Beijing National Laboratory for Condensed Matter Physics and Institute of Physics;School of Physical Sciences;Materials Science and Engineering Program;Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement of Ministry of Education;Department of Physics and Astronomy;School of Physics;Songshan Lake Materials Laboratory |
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| 基金项目： | Project supported by the National Key R&D Program of China(Grant No.2018YFA0305700);the National Natural Science Foundation of China(Grant Nos.11834016,11874400,and 11921004);the Beijing Natural Science Foundation,China(Grant No.Z190008);the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences(Grant No.QYZDB-SSW-SLH013);the CAS Interdisciplinary Innovation Team;support of Grant No.NSF-DMR-1350002;support of NSF DMR Grant No.1729588。 |
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| 摘 要： | The cubic pyrochlore Dy2Pt2O7 was synthesized under 4 GPa and 1000℃ and its magnetic and thermodynamic properties were characterized by DC and AC magnetic susceptibility and specific heat down to 0.1 K.We found that Dy2Pt2O7 does not form long-range magnetic order,but displays characteristics of canonical spin ice such as Dy2Pt2O7,including(1)a large effective moment 9.64μB close to the theoretical value and a small positive Curie-Weiss temperatureθCW=+0.77 K signaling a dominant ferromagnetic interaction among the Ising spins;(2)a saturation moment ~4.5μB being half of the total moment due to the local<111>Ising anisotropy;(3)thermally activated spin relaxation behaviors in the low(~1 K)and high(~20 K)temperature regions with different energy barriers and characteristic relaxation time;and most importantly,(4)the presence of a residual entropy close to Pauling’s estimation for water ice.
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| 关 键 词： | Dy2Pt2O7 PYROCHLORE OXIDE SPIN ICE high-pressure synthesis |
High pressure synthesis and characterization of the pyrochlore Dy_2Pt_2O_7:A new spin ice material |
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| Qi Cui,Yun-Qi Cai,Xiang Li,Zhi-Ling Dun,Pei-Jie Sun,Jian-Shi Zhou,Hai-Dong Zhou,Jin-Guang Cheng.High pressure synthesis and characterization of the pyrochlore Dy2Pt2O7:A new spin ice material[J].Chinese Physics B,2020(4):116-120. |
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| Authors: | Qi Cui Yun-Qi Cai Xiang Li Zhi-Ling Dun Pei-Jie Sun Jian-Shi Zhou Hai-Dong Zhou Jin-Guang Cheng |
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| Institution: | (Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China;Materials Science and Engineering Program,Mechanical Engineering,University of Texas at Austin,Austin,Texas 78712,USA;Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement of Ministry of Education,School of Physics,Beijing Institute of Technology,Beijing 100081,China;Department of Physics and Astronomy,University of Tennessee,Knoxville,TN 37996,USA;School of Physics,Georgia Institute of Technology,Atlanta,GA 30332,USA;Songshan Lake Materials Laboratory,Dongguan 523808,China) |
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