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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 paper, a structural phase transition of the type Bmab (orthorhombic) → I4/mmm (tetragonal) has been observed for the RCaCrO4 (RSm or Y) stoichiometric oxides.

10 citations

Posted Content
TL;DR: In this paper, the authors reviewed the properties of elastic phase transitions of crystals and phase transitions whose order parameter couples linearly to elastic degrees of freedom with particular focus on instabilities at zero temperature.
Abstract: Elastic phase transitions of crystals and phase transitions whose order parameter couples linearly to elastic degrees of freedom are reviewed with particular focus on instabilities at zero temperature. A characteristic feature of these transitions is the suppression of critical fluctuations by long-range shear forces. As a consequence, at an elastic crystal symmetry-breaking quantum phase transition the phonon velocity vanishes only along certain crystallographic directions giving rise to critical phonon thermodynamics described by a stable Gaussian fixed point. At an isostructural solid-solid quantum critical end point, on the other hand, the complete suppression of critical fluctuations results in true mean-field critical behavior without a diverging correlation length. Whenever an order parameter couples bilinearly to the strain tensor, the critical properties are eventually governed by critical crystal elasticity. This is, for example, the case for quantum critical metamagnetism but also for the classical critical Mott end point at finite $T$. We discuss and compare the solid-solid end points expected close to the Mott transition in V$_2$O$_3$ and $\kappa$-(BEDT-TTF)$_2 X$.

10 citations

Journal ArticleDOI
TL;DR: In this article, the magnetic phase transition of Co-Fe PBA was investigated and the degeneracy changes due to charge transfer between Co and Fe atoms accompanying the spin transition was taken into account.
Abstract: The combination of spin transitions and magnetic ordering provides an interesting structure of phase transitions in Prussian blue analogues (PBAs). To understand the structure of stable and metastable states of Co–Fe PBA, it is necessary to clarify free energy as a function of magnetization and the fraction of the high-temperature component. Including the magnetic interaction between high-temperature states, we study the magnetic phase transition of Co–Fe PBA in addition to spin transitions. Here, we take into account the degeneracy changes due to charge transfer between Co and Fe atoms accompanying the spin transition. In this study, the charge transfer between Co and Fe atoms is explicitly taken into account and also the ferrimagnetic structure of Co–Fe PBAs is expressed in the proper way. First, we found systematic changes in the structures of stable and metastable states as functions of system parameters using mean field theory. In particular, the existence of a metastable magnetic-ordered high-temper...

10 citations

Journal ArticleDOI
TL;DR: Most well-known metal-organic frameworks possessing the magnetic Ni2O2(CO2)2 chains, called Ni-MOF-74, are investigated with regard to magnetic properties at open-metal sites and the modulation of their magnetic phase and metamagnetism via imidazole molecule coordination is presented.
Abstract: Most well-known metal–organic frameworks (MOFs) possessing the magnetic Ni2O2(CO2)2 chains, called Ni-MOF-74, have been investigated with regard to magnetic properties at open-metal sites. We prese...

10 citations

Journal ArticleDOI
TL;DR: The bilayered ruthenate Sr 3 Ru 2 O 7 has a metamagnetic quantum critical point as mentioned in this paper, which is the first example of a material with a quantum-critical end point.
Abstract: The bilayered ruthenate Sr 3 Ru 2 O 7 has a metamagnetic quantum critical point. This is the first example of a material with a quantum-critical end-point. This work addresses the problem of the metamagnetic criticality in this system through the measurement of spin fluctuations by inelastic neutron scattering. Our results show that incommensurate antiferromagnetic fluctuations are present in a wide range of applied fields. We have also observed how ferromagnetic fluctuations develop at the metamagnetic field. Finally, the intensity of the two types of fluctuations is followed as a function of the energy transfer between the neutron and the spins.

10 citations

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202320
202249
202117
202015
201937
201837