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 electron transport properties and point contact spectra of melt-spun DyCu 5 with the cubic phase (structure type AuBe 5, space group F43m) were investigated.
Abstract: The electron transport properties and point contact spectra of melt-spun DyCu 5 with the cubic phase (structure type AuBe 5 , space group F43m) were investigated. It was found by ac-susceptibility measurements that below a transition temperature Tm = 6.5 K this phase shows metamagnetism. Between Tm and Tc = 14.5 K a spontaneous magnetization is found. Our measurements of electrical resistivity confirm the existence of two magnetic phase transitions in the compound. Furthermore, we present point contact spectra of DyCu5 -Cu heterocontacts which are directly proportional to the electron—quasiparticle interaction function. Apart from a peak at about 18 meV, which is characteristic of electron—phonon interaction in pure Cu, we observed a series of additional maxima at lower energy, which are connected with the allowed 4f-transitiοns from the ground state to excited crystalline electric field levels.
1 citations
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TL;DR: In this paper, the authors have synthesized a single crystal CePtAs and investigated the transport and magnetic properties of the single crystal, which is an antiferromagnet with a transition temperature T N of 1.0 K.
1 citations
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TL;DR: In this article, the antiferromagnetic interaction of 4f spin in DyB6 is enhanced by applying pressure, and it is found that the resistivity ϱ(T) increases with increasing pressure with the rate dTN/dP = 2.6 K/GPa.
Abstract: Electrical resistivity ϱ(T) of the rare-earth hexaboride DyB6, which shows an antiferromagnetism below 25 K (= TN) and an another phase transition at 30 K ( = T ∗ ), has been measured under high pressure up to 2.2 GPa and in high magnetic fields to 5 T. It is found that TN increases with increasing pressure with the rate dTN/dP = 2.6 K/GPa. A small anomaly in ϱ(T) near T ∗ disappears by applying pressure. The metamagnetic transition field HM (=4.13 T at 4.2 K) increases with pressure. These facts indicate that the antiferromagnetic interaction of 4f spin in DyB6 is enhanced by pressure.
1 citations
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TL;DR: In this article, the magnetic and electric properties of TmAlB4 single crystals were investigated and it was found that temperature-dependent magnetization showed a large anisotropy with the c axis being easy magnetic direction.
Abstract: The magnetic and electric properties of TmAlB4 single crystals were investigated. It was found that temperature-dependent magnetization showed a large anisotropy with the c axis being easy magnetic direction. The anisotropy is likely due to crystalline electric field effect. Isothermal magnetization at T=2K represented six metamagnetic transitions at HC1=9.6kOe, HC2=12kOe, HC3=17.1kOe, HC4=21.4kOe, HC5=24.1kOe, and HC6=26kOe. Field-dependent resistivity at T=2K with the applied field along the c axis and current perpendicular to the c axis exhibited a noticeable sharp change at the fields of metamagnetic transitions, confirming the six transitions. Based on the isothermal magnetization and field-dependent resistivity at several temperatures, a field-temperature phase diagram of TmAlB4 was constructed, which contains at least seven magnetic phases.
1 citations