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 paper, a metamagnetic field-induced transition is observed for four Nd2Fe17Hx hydrides corresponding to x=1, 1.5, 2, 3, 4.9.
Abstract: Nd2Fe17Hx compounds are investigated by high-field magnetization measurements performed up to 230 kOe in the 4.2–300-K temperature range. It is shown that the magnetic properties of the Nd2Fe17Hx (x=1, 1.5, 2, 3, 4.9) compounds are very sensitive to the hydrogen content. Insertion of hydrogen within the crystal structure induces a large increase in the Curie temperature. The saturation magnetization is also very sensitive to the hydrogen content, but exhibits a peculiar behavior depending on the hydrogen content. The first-order anisotropy parameter decreases continuously when the hydrogen content increases. A metamagnetic field-induced transition is observed for four Nd2Fe17Hx hydrides corresponding to x=1, 1.5, 2, 3. This metamagnetic transition manifests itself by a step in the magnetization curves recorded when the field is perpendicular to the alignment direction. The temperature dependence of the field at which the transition occurs is determined for all the studied compounds. The thermal evolution ...
2 citations
TL;DR: In this paper, a simple binary system UPt3 with ultrasound (US) as a probe was used to identify clear signatures in field sweeps demarking new high field spin phases and magnetostriction measurements performed up to 65 T also showed signatures at the same fields confirming these phase transitions.
Abstract: Strongly correlated electronic systems can harbor a rich variety of quantum spin states. Understanding and controlling such spin states in quantum materials is of great current interest. Focusing on the simple binary system UPt3 with ultrasound (US) as a probe we identify clear signatures in field sweeps demarkating new high field spin phases. Magnetostriction (MS) measurements performed up to 65 T also show signatures at the same fields confirming these phase transitions. At the very lowest temperatures (<200 mK) we also observe magneto-acoustic quantum oscillations which for θ = 90° (B||c-axis) and vicinity abruptly become very strong in the 24.8–30 T range. High resolution magnetization measurements for this same angle reveal a continuous variation of the magnetization implying the subtle nature of the implied transitions. With B rotated away from the c-axis, the US signatures occur at nearly the same field. These transitions merge with the separate sequence of the well known metamagnetic transition which commences at 20 T for θ = 0° but moves to higher fields as 1/cosθ. This merge, suggesting a tricritical behavior, occurs at θ ≈ 51° from the ab-plane. This is an unique off-symmetry angle where the length change along the c-axis is precisely zero due to the anisotropic nature of MS in UPt3 for all magnetic field values.
2 citations
TL;DR: In this article, the anomalously high Neel temperature of 70 K was confirmed and a strong uniaxial magnetic anisotropy with the easy c-axis is evidenced.
Abstract: High field magnetization up to 18 T and magnetic susceptibility measurements have been carried out on a PrRh2Si2 single crystal. The anomalously high Neel temperature of 70 K is confirmed. A strong uniaxial magnetic anisotropy with the easy c-axis is evidenced. A sharp metamagnetic transition appears at 16 T in the easy c-axis magnetization process while magnetization in the basal plane is very small and the curve is linear. The saturation moment obtained is 3.1μB. Crystalline electric field (CEF) effects have been analyzed to discuss the magnetic behaviors.
2 citations
TL;DR: In this article, low-temperature nuclear orientation was applied to study hyperfine interactions of 142 Pr, 147 Nd and 160 Tb nuclei in antiferromagnetic Pr 0.7 Nd 0.3 Tb 0.1 NiAl 4 single crystals.
2 citations
TL;DR: In this article, polycrystalline samples of RNiSb 2 (R=Dy and Ho) compounds were studied by magnetic experiments, and both compounds are antiferromagnets with metamagnetic transitions and Neel temperatures of 8.2 K for R=dy and 6.6 K for Ho.
2 citations