Large Magnetoresistance and Volume Expansion Associated with Valence Transition in Eu(Rh sub( 1-x)Ir sub( x)) sub( 2)Si sub( 2)
We report lattice parameters as a function of temperature, magnetization curves, and magnetoresistance of polycrystalline samples of ... The lattice parameters a and c for x = 0.3, 0.4, and 0.5 jump at around the valence transition temperature Tv. For these samples, the high-temperature (larger a, c...
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| Veröffentlicht in: | Journal of the Physical Society of Japan 2016-12, Vol.85 (12), p.1-1 |
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| container_title | Journal of the Physical Society of Japan |
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| creator | Mitsuda, Akihiro Fujimoto, Takumi Kishaba, Eigo Hamano, Suguru Kondo, Akihiro Kindo, Koichi Wada, Hirofumi |
| description | We report lattice parameters as a function of temperature, magnetization curves, and magnetoresistance of polycrystalline samples of ... The lattice parameters a and c for x = 0.3, 0.4, and 0.5 jump at around the valence transition temperature Tv. For these samples, the high-temperature (larger a, c) and low-temperature (smaller a, c) phases, the volume fraction of which changes with temperature, coexist at around Tv, which means that the valence transition is of the first order. The magnetization curves of x = 0.3, 0.4, and 0.5 at T = 4.2 K exhibit a metamagnetic transition with a large hysteresis, implying a first-order field-induced valence transition. The transition field Bv is proportional to Tv, Bv = aTv with a = 0.36 T/K. For x = 0.3, a large negative magnetoresistance associated with the field-induced valence transition is observed. The origin of the negative magnetoresistance is discussed. (ProQuest: ... denotes formulae/symbols omitted.) |
| format | Article |
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The lattice parameters a and c for x = 0.3, 0.4, and 0.5 jump at around the valence transition temperature Tv. For these samples, the high-temperature (larger a, c) and low-temperature (smaller a, c) phases, the volume fraction of which changes with temperature, coexist at around Tv, which means that the valence transition is of the first order. The magnetization curves of x = 0.3, 0.4, and 0.5 at T = 4.2 K exhibit a metamagnetic transition with a large hysteresis, implying a first-order field-induced valence transition. The transition field Bv is proportional to Tv, Bv = aTv with a = 0.36 T/K. For x = 0.3, a large negative magnetoresistance associated with the field-induced valence transition is observed. The origin of the negative magnetoresistance is discussed. 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The lattice parameters a and c for x = 0.3, 0.4, and 0.5 jump at around the valence transition temperature Tv. For these samples, the high-temperature (larger a, c) and low-temperature (smaller a, c) phases, the volume fraction of which changes with temperature, coexist at around Tv, which means that the valence transition is of the first order. The magnetization curves of x = 0.3, 0.4, and 0.5 at T = 4.2 K exhibit a metamagnetic transition with a large hysteresis, implying a first-order field-induced valence transition. The transition field Bv is proportional to Tv, Bv = aTv with a = 0.36 T/K. For x = 0.3, a large negative magnetoresistance associated with the field-induced valence transition is observed. The origin of the negative magnetoresistance is discussed. 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The lattice parameters a and c for x = 0.3, 0.4, and 0.5 jump at around the valence transition temperature Tv. For these samples, the high-temperature (larger a, c) and low-temperature (smaller a, c) phases, the volume fraction of which changes with temperature, coexist at around Tv, which means that the valence transition is of the first order. The magnetization curves of x = 0.3, 0.4, and 0.5 at T = 4.2 K exhibit a metamagnetic transition with a large hysteresis, implying a first-order field-induced valence transition. The transition field Bv is proportional to Tv, Bv = aTv with a = 0.36 T/K. For x = 0.3, a large negative magnetoresistance associated with the field-induced valence transition is observed. The origin of the negative magnetoresistance is discussed. (ProQuest: ... denotes formulae/symbols omitted.)</abstract></addata></record> |
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| issn | 0031-9015 1347-4073 |
| language | eng |
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| source | Alma/SFX Local Collection |
| subjects | Hysteresis Lattice parameters Magnetization curves Magnetoresistance Magnetoresistivity Origins Phases Transition temperature |
| title | Large Magnetoresistance and Volume Expansion Associated with Valence Transition in Eu(Rh sub( 1-x)Ir sub( x)) sub( 2)Si sub( 2) |
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