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Tuning of a Vertical Spin Valve with a Monolayer of Single Molecule Magnets

机译：单分子磁铁单层垂直自旋阀的调整

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摘要

The synthesis and the chemisorption from solution of a terbium bis-phthalocyaninato complex suitable for the functionalization of lanthanum strontium manganite (LSMO) are reported. Two phosphonate groups are introduced in the double decker structure in order to allow the grafting to the ferromagnetic substrate actively used as injection electrode in organic spin valve devices. The covalent bonding of functionalized terbium bis-phthalocyaninato system on LSMO surface preserves its molecular properties at the nanoscale. X-ray photoelectron spectroscopy confirms the integrity of the molecules on the LSMO surface and a small magnetic hysteresis reminiscent of the typical single molecule magnet behavior of this system is detected on surface by X-ray magnetic circular dichroism experiments. The effect of the hybrid magnetic electrode on spin polarized injection is investigated in vertical organic spin valve devices and compared to the behavior of similar spin valves embedding a single diamagnetic layer of alkyl phosphonate molecules analogously chemisorbed on LSMO. Magnetoresistance experiments have evidenced significant alterations of the magneto-transport by the terbium bis-phthalocyaninato complex characterized by two distinct temperature regimes, below and above 50 K, respectively.
机译：报道了适合于镧系锶锶锰矿（LSMO）功能化的双酞菁cyan络合物的合成及其从溶液中的化学吸附。在双层结构中引入两个膦酸酯基团，以允许接枝到有效用作有机自旋阀装置中的注入电极的铁磁基材。 LSMO表面上功能化的双酞菁ter体系的共价键保持了纳米级的分子性质。 X射线光电子能谱证实了LSMO表面上分子的完整性，并且通过X射线磁性圆二色性实验在表面上检测到了该系统典型的单分子磁体行为的微小磁滞现象。在垂直有机自旋阀装置中研究了混合磁电极对自旋极化注入的影响，并将其与类似的自旋阀的行为进行了比较，其中类似的自旋阀在LSMO上嵌入了类似化学吸附的烷基膦酸酯分子的单个抗磁性层。磁阻实验已证明，双-酞菁ter络合物的磁传输发生了显着变化，其特征是分别在50 K以下和50 K以上的两个不同的温度范围。

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  • 来源
    《Advanced Functional Materials》 |2017年第42期|1703600.1-1703600.10|共10页
  • 作者

    Cucinotta Giuseppe; Poggini Lorenzo; Pedrini Alessandro; Bertani Federico; Cristiani Nicola; Torelli Martina; Graziosi Patrizio; Cimatti Irene; Cortigiani Brunetto; Otero Edwige; Ohresser Philippe; Sainctavit Philippe; Dediu Alek; Dalcanale Enrico; Sessoli Roberta; Mannini Matteo;

  • 作者单位

    Univ Firenze, Dept Chem Ugo Schiff, Via Lastruccia 3, I-50019 Sesto Fiorentino, FI, Italy|Univ Firenze, INSTM RU, Via Lastruccia 3, I-50019 Sesto Fiorentino, FI, Italy;

    Univ Firenze, Dept Chem Ugo Schiff, Via Lastruccia 3, I-50019 Sesto Fiorentino, FI, Italy|Univ Firenze, INSTM RU, Via Lastruccia 3, I-50019 Sesto Fiorentino, FI, Italy|Univ Bordeaux, ICMCB, CNRS, UOR 9048, F-33600 Pessac, France;

    Univ Parma, Dipartimento Sci Chim Vita & Sostenibilita Ambien, Parco Area Sci 17-A, I-43124 Parma, Italy|Univ Parma, INSTM RU, Parco Area Sci 17-A, I-43124 Parma, Italy;

    Univ Parma, Dipartimento Sci Chim Vita & Sostenibilita Ambien, Parco Area Sci 17-A, I-43124 Parma, Italy|Univ Parma, INSTM RU, Parco Area Sci 17-A, I-43124 Parma, Italy;

    Univ Firenze, Dept Chem Ugo Schiff, Via Lastruccia 3, I-50019 Sesto Fiorentino, FI, Italy|Univ Firenze, INSTM RU, Via Lastruccia 3, I-50019 Sesto Fiorentino, FI, Italy|Univ Parma, Dipartimento Sci Chim Vita & Sostenibilita Ambien, Parco Area Sci 17-A, I-43124 Parma, Italy|Univ Parma, INSTM RU, Parco Area Sci 17-A, I-43124 Parma, Italy;

    Univ Parma, Dipartimento Sci Chim Vita & Sostenibilita Ambien, Parco Area Sci 17-A, I-43124 Parma, Italy|Univ Parma, INSTM RU, Parco Area Sci 17-A, I-43124 Parma, Italy;

    CNR, ISMN, Via Piero Gobetti 101, I-40129 Bologna, Italy;

    Univ Firenze, Dept Chem Ugo Schiff, Via Lastruccia 3, I-50019 Sesto Fiorentino, FI, Italy|Univ Firenze, INSTM RU, Via Lastruccia 3, I-50019 Sesto Fiorentino, FI, Italy;

    Univ Firenze, Dept Chem Ugo Schiff, Via Lastruccia 3, I-50019 Sesto Fiorentino, FI, Italy|Univ Firenze, INSTM RU, Via Lastruccia 3, I-50019 Sesto Fiorentino, FI, Italy;

    Synchrotron SOLEIL, Orme Merisiers St Aubin, BP 48, F-91192 Gif Sur Yvette, France;

    Synchrotron SOLEIL, Orme Merisiers St Aubin, BP 48, F-91192 Gif Sur Yvette, France;

    Synchrotron SOLEIL, Orme Merisiers St Aubin, BP 48, F-91192 Gif Sur Yvette, France|Univ Paris 06, CNRS, Inst Mineral Phys Mat & Cosmochim, IRD,MNHN,UMR 7590, 4 Pl Jussieu, F-75252 Paris, France;

    CNR, ISMN, Via Piero Gobetti 101, I-40129 Bologna, Italy;

    Univ Parma, Dipartimento Sci Chim Vita & Sostenibilita Ambien, Parco Area Sci 17-A, I-43124 Parma, Italy|Univ Parma, INSTM RU, Parco Area Sci 17-A, I-43124 Parma, Italy;

    Univ Firenze, Dept Chem Ugo Schiff, Via Lastruccia 3, I-50019 Sesto Fiorentino, FI, Italy|Univ Firenze, INSTM RU, Via Lastruccia 3, I-50019 Sesto Fiorentino, FI, Italy;

    Univ Firenze, Dept Chem Ugo Schiff, Via Lastruccia 3, I-50019 Sesto Fiorentino, FI, Italy|Univ Firenze, INSTM RU, Via Lastruccia 3, I-50019 Sesto Fiorentino, FI, Italy;

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  • 正文语种 eng
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  • 关键词

    molecular magnetism; molecular spintronics; organic spin-valve; spinterfaces; terbium double deckers;

    机译：分子磁性;分子自旋电子学;有机自旋阀;接口;ter双层;

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