Application of the finite-temperature Lanczos method for the evaluation of magnetocaloric properties of large magnetic molecules
Application of the finite-temperature Lanczos method for the evaluation of magnetocaloric properties of large magnetic molecules
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DOI：
10.1140/epjb/e2012-30546-7
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发表时间：
2012-07
期刊：
影响因子：
--
通讯作者：
J. Schnack;C. Heesing
中科院分区：
文献类型：
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作者：
J. Schnack;C. Heesing
我们讨论了含钆磁性分子的磁热性质，这可能是用于亚开尔文冷却。我们表明，单重基态的简并可能是有利的，以支持绝热过程的低温，同时尽量减少干扰偶极相互作用。由于这种自旋系统的希尔伯特空间假设非常大的尺寸，我们评估必要的热力学可观的有限温度Lanczos方法的装置。
We discuss the magnetocaloric properties of gadolinium containing magnetic molecules, which potentially could be used for sub-Kelvin cooling. We show that a degeneracy of a singlet ground state could be advantageous in order to support adiabatic processes to low temperatures and simultaneously minimize disturbing dipolar interactions. Since the Hilbert spaces of such spin systems assume very large dimensions, we evaluate the necessary thermodynamic observables by means of the finite-temperature Lanczos method.