Subsections
[Cr:4, Lc:3, Tt:0, Lb:0]
This course gives a broad overview of magnetism, magnetic behaviour of
range of modern inorganic complexes.
It will further discuss the concepts of different molecular magnetism
and their recent development, and the computational techniques that
are used to probe the magnetic properties of metal complexes.
- Introduction and basic concepts of Magnetism: Definition, Units and
Origin of magnetism, Instrumentation (VSM, SQUID), Experimental
Measurement of Magnetic Susceptibility (
) and Magnetisation
Isothermal (M), Classes of Magnetism- Diamagnetism- Paramagnetism,
Classes of Paramagnetism, Zeeman effect, Temperature dependence of
, The Curie Law and the Curie-Weiss Law, Calculating magnetic
susceptibilities by Van Vleck equation.
- Magnetic moments and Ground state terms: Magnetic moments of first
row transition metal ions and their orbital contribution to the
magnetic moment, High spin octahedral transition metal complexes and
their magnetic properties with A and E ground terms, Orbital
contribution in f-block elements and the magnetic properties of
f-block coordination complexes.
- Spin-Hamiltonian parameters and related concepts: Spin-orbit
coupling, Magnetic Anisotropy (
), Sources of magnetic anisotropy,
Zero field splitting (ZFS;D) - Quantitative approach to ZFS, EPR in
magnetism and interpreting the anisotropy of hyperfine interactions,
Magnetic interaction (
) - Types of magnetic interaction with
examples, Spin Hamiltonian- Exchange coupling, The theory of
ferro-antiferromagnetism, Bleaney-Bowers Equation and their
applications to the mechanism of exchange interaction, Magnetic
interaction in dinuclear, trinuclear and polynuclear clusters and
their examples: Cluster spin states, Spin-frustration, Quantum size
effects, Magneto-Structural Correlations, Soft and hard magnetic
materials.
- Concepts of Molecular nanomagnets: Introduction to Single Molecule
magnets (SMMs) and related applications: Interpretation of
Spin-Hamiltonian parameters (J, g & D) that decide the SMM
behaviour of a metal complex, Measurement of Hysteresis loop and AC
Susceptibility, the theory of Quantum tunnelling of the
Magnetisation (QTM) and Transverse anisotropy.
- Introduction to Spin-Crossover (SCO): The theory of SCO behaviour,
theory of LIESST effect in SCO compounds and their applications.
- Introduction to Single-Molecule Toroics (SMTs): Cyclic Dy 3 , Dy 4
and Dy 6 SMTs, the theory of Ferrotoroidic and Antiferrotoroidic
ground states and their applications in multiferroic materials.
- Importance of DFT and Ab Initio Calculations in predicting the
magnetic behaviour of a metal complex.
- Hands-on training to data analysis: PHI software - a tool used to
interpret the measured magnetic data of metal complexes.
- R. L. Carlin, Magnetochemistry, Springer, 1985.
- O. Kahn, Molecular Magnetism, VCH Publishers, 1993.
- R. L. Dutta, A. Syamal, Elements of Magnetochemistry, Affiliated
East-West Press, 2004.
- C. Benelli and D. Gatteschi, Introduction to Molecular Magnetism,
Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, Germany, 2015.
