Magnetochemistry is concerned with the magnetic properties of chemical compounds. Magnetic properties arise from the spin and orbital angular momentum of the electrons contained in a compound. Compounds are diamagnetic when they contain no unpaired electrons. Molecular compounds that contain one or more unpaired electrons are paramagnetic. The magnitude of the paramagnetism is expressed as an effective magnetic moment, μeff. For first-row transition metals the magnitude of μeff is, to a first approximation, a simple function of the number of unpaired electrons, the spin-only formula. In general, spin-orbit coupling causes μeff to deviate from the spin-only formula. For the heavier transition metals, lanthanides and actinides, spin-orbit coupling cannot be ignored. Exchange interaction can occur in clusters and infinite lattices, resulting in ferromagnetism, antiferromagnetism or ferrimagnetism depending on the relative orientations of the individual spins.

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Magnetoelectrochemistry is a branch of electrochemistry dealing with magnetic effects in electrochemistry.

These effects have been supposed to exist since the time of Michael Faraday. There have also been observations on the existence of Hall effect in electrolytes. Until these observations, magnetoelectrochemistry was an esoteric curiosity, though this field has had a rapid development in the past years and is now an active area of research. Other scientific fields which contributed to the development of magnetoelectrochemistry are magnetohydrodynamics and convective diffusion theory.

esoteric
intended for or likely to be understood by only a small number of people with a specialized knowledge or interest.

"esoteric philosophical debates"

abstruse
obscure
arcane
recherché
rarefied
recondite
abstract
difficult
hard
puzzling
perplexing
enigmatic
inscrutable
cryptic
Delphic
complex
complicated
involved
over/above one's head
incomprehensible
opaque
unfathomable
impenetrable
mysterious
occult
little known
hidden
secret
private
mystic
magical
cabbalistic
involuted

mid 17th century: from Greek esōterikos, from esōterō, comparative of esō ‘within’, from es, eis ‘into’. Compare with exoteric.

exoteric
/ˌɛksə(ʊ)ˈtɛrɪk/

FORMAL
adjective: exoteric
intended for or likely to be understood by the general public.

Origin

mid 17th century: via Latin from Greek exōterikos, from exōterō ‘outer’, comparative of exō ‘outside’.