Crystal Growth with Oxygen Partial Pressure of the BaCuSi2O6 and Ba1–xSrxCuSi2O6 Spin Dimer Compounds
Crystal Growth with Oxygen Partial Pressure of the BaCuSi2O6 and Ba1–xSrxCuSi2O6 Spin Dimer Compounds
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BaCuSi2O6 和 Ba1âxSrxCuSi2O6 自旋二聚体化合物在氧分压下的晶体生长
DOI:
10.1021/acs.cgd.6b00399
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发表时间:
2016
影响因子:
3.8
通讯作者:
Assmus
中科院分区:
文献类型:
--
作者:
van Well;Puphal;Wehinger;Schefer;Rüegg;Ritter;Krellner;Assmus
BaCuSi2O6is a quasi-two-dimensional spin dimer system and a model material for studying Bose–Einstein condensation (BEC) of magnons in high magnetic fields. The new Ba1–xSrxCuSi2O6mixed system, which can be grown withx≤ 0.3, and BaCuSi2O6, both grown by using a crystal growth method with enhanced oxygen partial pressure, have the same tetragonal structure (I41/acd) at room temperature. The mixed system shows no structural phase transition so that the tetragonal structure is stable down to low temperatures. The oxygen partial pressure acts as a control parameter for the growth process. A detailed understanding of the crystal structure depending on the oxygen content will enable the study of the spin dynamics of field-induced order states in this model magnetic compound of high current interest with only one type of dimer layers, which shows the same distance between the Cu atoms, in the structure.
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2007
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