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Magnetic Correlation Engineering in Spin-Sandwiched Layered Magnetic Frameworks
Hiroki Fukunaga1, Wataru Kosaka2,1, Honoka Nemoto1
1Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, 980-8578, Japan.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|July 11, 2020
Summary
Controlling magnetic interactions in layered materials is complex. This study demonstrates tuning magnetic properties by adjusting interactions between inserted spins and magnetic layers in novel supramolecular magnets.
Area of Science:
- Materials Science
- Magnetism
- Supramolecular Chemistry
Background:
- Interlayer magnetic correlations in layered materials can be influenced by inserting "sandwiched spins".
- This insertion introduces complexity due to competing interactions: inserted spin-layer (JNNI) and through-space (JNNNI) interactions.
- Competition arises when JNNI and JNNNI have similar magnitudes but opposite signs.
Purpose of the Study:
- To systematically tune magnetic phase variations in supramolecular pillared layer magnets.
- To investigate the influence of JNNI and JNNNI on magnetic properties.
- To explore the role of different metal ions (M=Co, Fe, Cr) as inserted spins.
Main Methods:
- Synthesis of two isostructural series of supramolecular pillared layer magnets: [MCp*2 ][{Ru2 II,II (2,3,5,6-F4 CO2 )4 }2 (TCNQ)]⋅2 DCE and their DCE-free counterparts.
- Systematic variation of metal ions (M=Co, Fe, Cr) with different spin values (S=0, 1/2, 3/2).
- Analysis of magnetic phase variations as a function of JNNI and JNNNI.
Main Results:
- Demonstrated the ability to tune magnetic phase variations by controlling JNNI and JNNNI.
- Observed flexible and changeable magnetic natures of the synthesized magnets.
- Showcased the dependence of magnetic properties on the interplay between JNNI, JNNNI, and the nature of the inserted spins (M).
Conclusions:
- The magnetic behavior of these supramolecular magnets is highly tunable.
- Precise control over JNNI and JNNNI allows for modulation of magnetic properties.
- This work provides a pathway for designing novel magnetic materials with tailored functionalities.
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