Abstract
| Original language | English |
|---|---|
| Publication status | Published - Jul 2018 |
| Event | International Conference on Magnetism 2018 - Moscone Center, San Francisco, San Francisco, United States Duration: 14 Jul 2018 → 20 Jul 2018 http://www.icm2018sf.org/ |
Conference
| Conference | International Conference on Magnetism 2018 |
|---|---|
| Abbreviated title | ICM 2018 |
| Country | United States |
| City | San Francisco |
| Period | 14/07/2018 → 20/07/2018 |
| Internet address |
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Keywords
- Magnetic susceptibility
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Magnetic properties of Bis-Lanthanoates. / Felton, Solveig; Nockemann, Peter; Esien, Kane; McCourt, Eadaoin.
2018. Poster session presented at International Conference on Magnetism 2018, San Francisco, United States.Research output: Contribution to conference › Poster
TY - CONF
T1 - Magnetic properties of Bis-Lanthanoates
AU - Felton, Solveig
AU - Nockemann, Peter
AU - Esien, Kane
AU - McCourt, Eadaoin
PY - 2018/7
Y1 - 2018/7
N2 - In this study three different types of bis-lanthanoates, that exist in different phases, have been synthesised and characterised (Ln = lanthanide): 1) imidazolium lanthanide acetate – [C4Mim]2[Ln2(OAc)8] – forms a crystalline solid at room temperature, 2) phosphonium lanthanide acetate – [P666 14]2[Ln2(OAc)8] – is in a solid glassy state, and 3) phosphonium lanthanide octanoate – [P666 14]2[Ln2(Oct)8] – is an ionic liquid. X-ray diffraction of the crystalline solid 1) confirm that the Ln(III) ions form dimers, bridged by carboxyl groups, but cannot yield information about samples 2) and 3) since these lack long-range order. SQUID magnetometry studies of samples where the lanthanide is dysprosium, show that all three samples have effective magnetic moments consistent with non-interacting Ln(III) ions at room temperature, but deviate from this behaviour in the same way below 50 K, see figure. The experimentally determined magnetic susceptibility has been compared to a simple model for a system with two Dy(III) ions; the implications from these fits for the magnetic interactions and the structure of the ionic liquid and glass will be discussed.
AB - In this study three different types of bis-lanthanoates, that exist in different phases, have been synthesised and characterised (Ln = lanthanide): 1) imidazolium lanthanide acetate – [C4Mim]2[Ln2(OAc)8] – forms a crystalline solid at room temperature, 2) phosphonium lanthanide acetate – [P666 14]2[Ln2(OAc)8] – is in a solid glassy state, and 3) phosphonium lanthanide octanoate – [P666 14]2[Ln2(Oct)8] – is an ionic liquid. X-ray diffraction of the crystalline solid 1) confirm that the Ln(III) ions form dimers, bridged by carboxyl groups, but cannot yield information about samples 2) and 3) since these lack long-range order. SQUID magnetometry studies of samples where the lanthanide is dysprosium, show that all three samples have effective magnetic moments consistent with non-interacting Ln(III) ions at room temperature, but deviate from this behaviour in the same way below 50 K, see figure. The experimentally determined magnetic susceptibility has been compared to a simple model for a system with two Dy(III) ions; the implications from these fits for the magnetic interactions and the structure of the ionic liquid and glass will be discussed.
KW - Magnetic susceptibility
M3 - Poster
ER -