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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 article, the magnetic properties of La 0.9 Sr 0.1 MnO 3 samples prepared by the floating-zone technique have been studied and the results were interpreted within the framework of a mixed ferromagnetic-antiferromagnetic ground state model.
23 citations
TL;DR: Observations and local-density-approximation calculations indicate a strong dependence of the Fermi surface on Ca concentration and suggest the coexistence of itinerant and localized electronic states in single layered ruthenates.
Abstract: We report an electrical transport study in Ca2-xSrxRuO4 single crystals at high magnetic fields (B). For x=0.2, the Hall constant Rxy decreases sharply at an anisotropic metamagnetic transition, reaching its value for Sr2RuO4 at high fields. A sharp decrease in the coefficient of the resistivity T2 term and a change in the structure of the angular magnetoresistance oscillations for B rotating in the planes confirms the reconstruction of the Fermi surface. Our observations and local-density-approximation calculations indicate a strong dependence of the Fermi surface on Ca concentration and suggest the coexistence of itinerant and localized electronic states in single layered ruthenates.
23 citations
TL;DR: The RAl alloys are orthorhombic and the structure can be described with a trigonal motif similar to a halfcell of CsCl as mentioned in this paper, and the magnetic properties of the RAl 2 alloys, where R is any rare earth from Ce to Tm, have been measured in fields up to 25kOe or 60 kOe and at temperatures between 1.4° and 400°K.
Abstract: The RAl alloys are orthorhombic; the structure can be described with a trigonal motif similar to a half‐cell of CsCl. The R3Al2 alloys are tetragonal. The magnetic properties of the RAl alloys, where R is any rare earth from Ce to Tm, and those of the R3Al2 alloys, with R passing from Gd to Tm, have been measured in fields up to 25 kOe or 60 kOe and at temperatures between 1.4° and 400°K. The RAl alloys, with R from Pr to Tb, order antiferromagnetically at temperature between 20°K (PrAl) and 72°K (TbAl); the magnetic configuration of TbAl has been studied by neutron diffraction; HoAl is ferromagnetic with a Curie point at 26°K; DyAl, ErAl and TmAl exhibit metamagnetism at 4.2°K. Gd3Al2 is ferromagnetic with a Curie point at 282°K, close to that of Gd; Dy3Al2 shows an antiferromagnetic transition near 20°K in zero field and metamagnetic behavior induced by a field below this temperature; its Curie point is 76°K. All compounds exhibit a Curie‐Weiss behavior above their transition points, with a paramagnetic moment close to that of the corresponding free tripositive rare earth ions.
23 citations
TL;DR: In this paper, the high field magnetization data of Monod, Felner, Chouteau and Shaltiel on TiBe2 were discussed in terms of a metamagnetic transition in fields about 5 T.
Abstract: The high field magnetization data of Monod, Felner, Chouteau and Shaltiel [1] on TiBe2 are discussed in terms of a metamagnetic transition in fields about 5 T.
23 citations
TL;DR: In this paper, a heat capacity anomaly corresponding to the magnetic phase transition was detected at 6.2 -6.1 -K. The observed entropy gain (Δ S = 2.32 R ) is in good agreement with the theoretical magnetic entropy (R ln 5×2=2.3 R ) considering the spin multiplicity of high spin trivalent Mn and low spin tri-valent Fe ions.
Abstract: Heat capacities of [Mn(cyclam)][Fe(CN) 6 ]·3H 2 O (cyclam=1,4,8,11-tetraazacyclotetradecane) under zero magnetic field in the 0.1–300 K range were studied by adiabatic calorimetry. A heat capacity anomaly corresponding to the magnetic phase transition was detected at 6.2 K. The observed entropy gain (Δ S =2.32 R ) is in good agreement with the theoretical magnetic entropy ( R ln 5×2=2.3 R ) considering the spin multiplicity of high spin trivalent Mn and low spin trivalent Fe ions. Attempts have been made to interpret the low temperature heat capacity data in terms of the spin-wave theory. Possible magnetic interaction mechanism is discussed by comparing with those of related compounds. Heat capacity studies under applied magnetic fields indicated an antiferromagnetic to ferromagnetic transition. A field dependence study of magnetization at different temperatures revealed a field-induced metamagnetic transition.
23 citations