Sublimable chloroquinolinate lanthanoid single-ion magnets deposited on ferromagnetic electrodes,Chemical Science

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Sublimable chloroquinolinate lanthanoid single-ion magnets deposited on ferromagnetic electrodes
Chemical Science ( IF 7.6 ) Pub Date : 2017-10-17 00:00:00 , DOI: 10.1039/c7sc03463f
Sara G. Miralles _{1,

2,

3,

4} , Amilcar Bedoya-Pinto _{4,

5,

6,

7,

8} , José J. Baldoví _{1,

2,

3,

4,

9} , Walter Cañon-Mancisidor _{1,

2,

3,

4,

10} , Yoann Prado _{1,

2,

3,

4} , Helena Prima-Garcia _{1,

2,

3,

4} , Alejandro Gaita-Ariño _{1,

2,

3,

4} , Guillermo Mínguez Espallargas _{1,

2,

3,

4} , Luis E. Hueso _{4,

5,

6} , Eugenio Coronado _{1,

2,

3,

4}

Affiliation

A new family of chloroquinolinate lanthanoid complexes of the formula A⁺[Ln(5,7Cl₂q)₄]⁻, with Ln = Y³⁺, Tb³⁺ and Dy³⁺ and A⁺ = Na⁺, NEt₄⁺ and K_0.5(NEt₄)_0.5⁺, is studied, both in bulk and as thin films. Several members of the family are found to present single-molecule magnetic behavior in bulk. Interestingly, the sodium salts can be sublimed under high vacuum conditions retaining their molecular structures and magnetic properties. These thermally stable compounds have been deposited on different substrates (Al₂O₃, Au and NiFe). The magnetic properties of these molecular films show the appearance of cusps in the zero-field cooled curves when they are deposited on permalloy (NiFe). This indicates a magnetic blocking caused by the interaction between the single-ion magnet and the ferromagnet. X-ray absorption spectroscopy confirms the formation of hybrid states at the molecule/metal interface.

中文翻译：

沉积在铁磁电极上的可升华氯喹啉酸酯镧系单离子磁体

一个新的式A ⁺ [Ln（5,7Cl ₂ q）₄ ] ^-的氯喹啉酸酯镧系元素络合物，其中Ln = Y ³⁺，Tb ³⁺和Dy ^3+，而A ⁺ = Na ⁺，NEt ₄⁺和K _0.5（NEt ₄）_0.5⁺，无论是散装还是薄膜，都进行了研究。发现该家族的几个成员具有大量的单分子磁性行为。有趣的是，钠盐可以在高真空条件下升华，保持其分子结构和磁性。这些热稳定的化合物已沉积在不同的基材（Al ₂ O ₃，Au和NiFe）上。当这些分子膜沉积在坡莫合金（NiFe）上时，其磁性能在零场冷却曲线中显示出尖点。这表明由单离子磁体和铁磁体之间的相互作用引起的磁阻。X射线吸收光谱法证实了在分子/金属界面处的杂化态的形成。

更新日期：2017-11-02

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