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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, the authors investigated the thermodynamic properties of the heavy fermion superconductor UTe2 in pulsed high magnetic fields and observed the superconducting transition in zero field at Tc = 1.65 K as a sha...
Abstract: We investigated the thermodynamic property of the heavy fermion superconductor UTe2 in pulsed high magnetic fields. The superconducting transition in zero field was observed at Tc = 1.65 K as a sha...
29 citations
TL;DR: In this paper, a single crystal of anhydrous FeBr2, at a field of 31.5 kOe at 4.2°K, using pulsed fields to 200kOe along the c axis.
Abstract: The highly anisotropic behavior of several ferrous ion antiferromagnets (FeCl2, FeCO3) has suggested Ising‐model behavior. Sharp field‐induced (metamagnetic) transitions to a ferromagnetic (or nearly saturated paramagnetic) configuration have been observed. We find this transition in a single crystal of anhydrous FeBr2, occurring at a field of 31.5 kOe at 4.2°K, using pulsed fields to 200 kOe along the c axis. The spontaneous magnetization per Fe2+ ion is 4.05±0.2 Bohr magnetons. A differential molar susceptibility between 70 and 200 kOe of 0.8±0.2×10−2 is interpreted as a Van Vleck ``temperature‐independent'' paramagnetism in qualitative agreement with expectation. Susceptibility—temperature measurements along the c axis reveal an asymmetric shape characteristic of recent Ising‐model calculations. In the region just above the Neel point (11°K), the magnetization shows an initial upward concavity with field and a subsequent inflection point. This destruction of residual intermediate range order had also been predicted in Ising‐model calculations. The critical transition field determines the antiferromagnetic interlayer exchange and an estimate is made of the ferromagnetic intralayer exchange. The values for FeBr2 are compared with those for FeCl2, revealing a considerable drop in the ferromagnetic parameter with change of anion from Cl to Br. The antiferromagnetic exchange of FeBr2 is stronger than its ferromagnetic exchange in contrast to previous experience with layer structures.
29 citations
TL;DR: A large spontaneous strain with the value of about 0.12% upon martensitic transformation has been observed in this alloy, which is almost three times larger than that in ternary Ni 46Cu4Mn38Sn12 Heusler alloy.
Abstract: Spontaneous strains during martensitic transformation and magnetic-field-induced transformation have been systemically studied for Ni46Cu4Mn38Sn12 Heusler alloy, respectively. A large spontaneous strain with the value of about 0.12% upon martensitic transformation has been observed in this alloy, which is almost three times larger than that in ternary Ni–Mn–Sn alloy. In addition, such a value of strain can be obtained through a fully reverse martensitic transformation induced by a field of about 45 kOe, exhibiting a considerable metamagnetic shape memory effect without any prestrain. This behavior can be attributed to magnetoelastic coupling between stable martensite and metastable fraction of austenite.
29 citations
TL;DR: The influence of Co substitution on the structural and magnetic properties of La(Fe 1− x Co x ) 11.4 SP 1.6 compounds was investigated by X-ray diffraction, Mossbauer spectroscopy and magnetization measurements.
29 citations
TL;DR: In this paper, a determination of metamagnetic PrCo 2 Si 2 has been made in high fields up to 16 T by using a pulsed high magnetic field system developed by the present authors.
Abstract: A determination of magnetic structures of metamagnetic PrCo 2 Si 2 has been made in high fields up to 16 T by using a pulsed high magnetic field system developed by the present authors. It has been confirmed that the complicated magnetic structures in high fields obtained by this experiment are identical with those suggested by high field magnetization measurement. The maximum field in this experiment is the highest one reported so far as the magnetic field used for the neutron diffraction experiments and it has been turned out that the pulsed field method is useful to determine the magnetic structures in high field phases.
29 citations