Topic
Metamagnetism
About: Metamagnetism is a research topic. Over the lifetime, 2023 publications have been published within this topic receiving 38108 citations.
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TL;DR: In this article, the magnetization and electrical resistivity of antiferromagnetic CePdAl were measured at 0.5 -k in steady fields up to 10 -k along the c -axis.
28 citations
TL;DR: In this article, a large H/D isotope effect is observed on the magnetic properties: the hydride presents a larger spontaneous magnetization and a 50% higher transition temperature T{sub M0} than the deuteride.
Abstract: The YFe{sub 2}(H{sub y}D{sub 1-y}){sub 4.2} compounds (y=0,0.64,1) crystallize in the same monoclinic structure with a linear increase of the cell volume reaching 0.80% between the hydride and the deuteride. These compounds undergo a first-order magnetovolumic transition from a ferromagnetic to an antiferromagnetic structure, which is related to an itinerant electron metamagnetism (IEM) transition of one of the Fe sites that is surrounded by about 5 (H, D) atoms. A large H/D isotope effect is observed on the magnetic properties: the hydride presents a larger spontaneous magnetization and a 50% higher transition temperature T{sub M0} than the deuteride. This large isotope effect is attributed to the large cell volume difference between the hydride and the deuteride, which plays a dominant role due to the strong interplay between magnetic and elastic energy in IEM compounds.
28 citations
TL;DR: In this paper, the specific conditions used in the preparation of the dimorphic phases of HoCrO4 oxide were reported, and the structures of both the polytypes have been refined from X-ray powder diffraction data using the Rietveld method.
28 citations
TL;DR: The ternary intermetallics R6Fe13X (R = Pr, Nd; X = Cu, Sb, Bi) all crystallize in the tetragonal Nd6Fe14Si structure.
28 citations
TL;DR: In this article, single-crystal magnetisation and polarised neutron diffraction (PND) measurements have been made for the Rhenium-IV complex, with three unpaired spins.
Abstract: Single-crystal magnetisation and polarised neutron diffraction (PND)
measurements have been made for the complex
cis-[ReCl
4
(NHCMeNHPh)
2
]. At higher
temperatures the magnetic behaviour is typical of such a
rhenium-(IV) complex, with three unpaired spins
(µ = 3.6 µ
B
), an almost isotropic
g-tensor of 1.86(1) and a large zero-field splitting, 2D,
of -20(2) cm
-1
. At very low temperatures the
magnetisation behaviour as a function of temperature and field strength and
direction indicates two magnetically ordered structural phases when
H||b, but only one for a and c,
with T
N
= 9.7(1) K. A
tricritical point at T = 5.8(2) K and
H = 4.40(5) T was established on the
transition line in H vs. T space between the two phases when
H||b. This behaviour is metamagnetic. The
two-dimensional form of the stronger magnetic exchange implied, with weaker
interlayer interaction, can be correlated with the observed structural
feature of ab planes of ReCl
4
units separated by layers
of phenyl rings. The PND experiment showed that about half of the spin of
the system is delocalised away from the Re by covalent bonding to the Cl
atoms and the amidine ligand, accompanied by considerable effects
resembling spin polarisation. The magnetic space groups are
P2
1
/c at low magnetic fields and
Pc2
1
n at high fields along
b, compared with the nuclear structural space group of
Pccn.
28 citations