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Magnetic and Electronic Properties of Highly Mn-Doped β-NaGdF4 and β-NaEuF4 Nanoparticles with a Narrow Size Distribution
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-07-24 , DOI: 10.1021/acs.jpcc.0c04639
Lilli Schneider 1 , Jannis Wehmeier 2 , Ulf Wiedwald 3 , Jari Rodewald 1 , Vadim R. Galakhov 4, 5 , Margarita S. Udintseva 4 , Vitaly Mesilov 4 , Florin Radu 6 , Chen Luo 6, 7 , Johann P. Klare 1 , Heinz-Jürgen Steinhoff 1 , Markus Haase 2 , Karsten Kuepper 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-07-24 , DOI: 10.1021/acs.jpcc.0c04639
Lilli Schneider 1 , Jannis Wehmeier 2 , Ulf Wiedwald 3 , Jari Rodewald 1 , Vadim R. Galakhov 4, 5 , Margarita S. Udintseva 4 , Vitaly Mesilov 4 , Florin Radu 6 , Chen Luo 6, 7 , Johann P. Klare 1 , Heinz-Jürgen Steinhoff 1 , Markus Haase 2 , Karsten Kuepper 1
Affiliation
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We have performed a detailed study of the magnetic and electronic properties of highly manganese-doped β-NaGdF4 and β-NaEuF4 nanoparticles with a narrow size distribution. XPS as well as XRF experiments confirm the successful doping of 11 ± 2% Mn into β-NaGdF4 and β-NaEuF4 nanoparticles, i.e., a much higher Mn concentration than has been previously reported for the incorporation of bivalent transition metal ions into the β phase of NaREF4 (RE = rare earth) nanocrystals. Owing to the high manganese concentration, we observed quenching of the Mn2+ emission in both materials and even quenching of the red Eu3+ emission in β-NaEuF4:11% Mn particles. We have investigated the Mn–Mn magnetic interactions by means of EPR spectroscopy, and SQUID magnetometry further supports a significant increase of the magnetization of the Mn-doped β-NaEuF4 nanoparticles compared to pure β-NaEuF4. By using element specific X-ray absorption spectroscopy and X-ray magnetic circular dichroism, we show that the magnetism of Mn-doped β-NaEuF4 is dominated by the divalent Mn ions for Mn-doped β-NaEuF4. A parallel alignment of the gadolinium and manganese magnetic moments is found.
中文翻译：
高Mn掺杂β-NaGdF的磁性和电子性质4和β-NaEuF 4纳米微粒粒径分布窄
我们已经进行了高度锰掺杂的β-NaGdF的磁性和电子性质的详细研究4和β-NaEuF 4个纳米颗粒具有较窄的粒径分布。XPS以及XRF实验证实11±2％的Mn的成功掺杂成β-NaGdF 4和β-NaEuF 4个纳米颗粒，即，更高的Mn浓度比已为二价过渡金属离子的掺入被报告过NaREF 4（RE =稀土）纳米晶体的β相。由于高锰浓度，我们观察到锰的淬火2+在材料排放，甚至淬火红色的Eu 3+在发射β-NaEuF 4：11％Mn颗粒。通过EPR光谱学方法，我们已经研究了锰的Mn的磁相互作用，和SQUID磁力进一步支持了Mn掺杂β-NaEuF的磁化的显著增加4个纳米颗粒相比，纯β-NaEuF 4。通过使用特定的元素的X射线吸收光谱法和X射线磁圆二色性，我们表明，Mn掺杂β-NaEuF的磁性4是由二价为主Mn离子用于掺杂Mn的β-NaEuF 4。发现the磁矩和锰磁矩平行排列。
更新日期：2020-08-20
中文翻译：
高Mn掺杂β-NaGdF的磁性和电子性质4和β-NaEuF 4纳米微粒粒径分布窄
我们已经进行了高度锰掺杂的β-NaGdF的磁性和电子性质的详细研究4和β-NaEuF 4个纳米颗粒具有较窄的粒径分布。XPS以及XRF实验证实11±2％的Mn的成功掺杂成β-NaGdF 4和β-NaEuF 4个纳米颗粒，即，更高的Mn浓度比已为二价过渡金属离子的掺入被报告过NaREF 4（RE =稀土）纳米晶体的β相。由于高锰浓度，我们观察到锰的淬火2+在材料排放，甚至淬火红色的Eu 3+在发射β-NaEuF 4：11％Mn颗粒。通过EPR光谱学方法，我们已经研究了锰的Mn的磁相互作用，和SQUID磁力进一步支持了Mn掺杂β-NaEuF的磁化的显著增加4个纳米颗粒相比，纯β-NaEuF 4。通过使用特定的元素的X射线吸收光谱法和X射线磁圆二色性，我们表明，Mn掺杂β-NaEuF的磁性4是由二价为主Mn离子用于掺杂Mn的β-NaEuF 4。发现the磁矩和锰磁矩平行排列。
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