Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland.
J Am Chem Soc. 2012 Jun 20;134(24):9840-3. doi: 10.1021/ja301044p. Epub 2012 Jun 6.
The magnetism of DySc(2)N@C(80) endofullerene was studied with X-ray magnetic circular dichroism (XMCD) and a magnetometer with a superconducting quantum interference device (SQUID) down to temperatures of 2 K and in fields up to 7 T. XMCD shows hysteresis of the 4f spin and orbital moment in Dy(III) ions. SQUID magnetometry indicates hysteresis below 6 K, while thermal and nonthermal relaxation is observed. Dilution of DySc(2)N@C(80) samples with C(60) increases the zero-field 4f electron relaxation time at 2 K to several hours.
用 X 射线磁圆二色性 (XMCD) 和超导量子干涉仪 (SQUID) 磁力计研究了 DySc(2)N@C(80) 富勒烯的磁性，温度低至 2 K，磁场高达 7 T。XMCD 显示了 Dy(III)离子的 4f 自旋和轨道磁矩的滞后现象。SQUID 磁强计表明，在 6 K 以下存在滞后现象，同时观察到热弛豫和非热弛豫。用 C(60)稀释 DySc(2)N@C(80)样品，将 2 K 时的零场 4f 电子弛豫时间延长至数小时。
