First-Order Valence Transition of EuPd2Si2 Induced by High Magnetic Fields

Hirofumi Wada; Akihiro Mitsuda; Masayuki Shiga; Hiroko Aruga Katori; Tsuneaki Goto

doi:10.1143/JPSJ.65.3471

First-Order Valence Transition of EuPd₂Si₂ Induced by High Magnetic Fields

Hirofumi Wada, Akihiro Mitsuda, Masayuki Shiga, Hiroko Aruga Katori, Tsuneaki Goto

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

In order to study the magnetic field effects on the intermediate valence of the Eu system, magnetization was measured for EuPd₂Si₂ and Eu(Pd_0.95Pt_0.05)₂Si₂ up to 100 T. A first-order metamagnetic transition was observed for both samples under high magnetic fields. The transition field is 93T for EuPd₂Si₂ at 6 K. The saturation magnetization close to 7μ_B indicates that this metamagnetism is a field-induced valence transition from an intermediate valence state to a divalent state of the Eu ion. Based on the interconfigurational fluctuation (ICF) model, the excitation energy to convert an Eu³⁺ ion into Eu²⁺ was estimated. Temperature dependence of the metamagnetic transition field of EuPd₂Si₂ was also studied.

Original language	English
Pages (from-to)	3471-3473
Number of pages	3
Journal	journal of the physical society of japan
Volume	65
Issue number	11
DOIs	https://doi.org/10.1143/JPSJ.65.3471
Publication status	Published - Jan 1 1996
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1143/JPSJ.65.3471

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title = "First-Order Valence Transition of EuPd2Si2 Induced by High Magnetic Fields",

abstract = "In order to study the magnetic field effects on the intermediate valence of the Eu system, magnetization was measured for EuPd2Si2 and Eu(Pd0.95Pt0.05)2Si2 up to 100 T. A first-order metamagnetic transition was observed for both samples under high magnetic fields. The transition field is 93T for EuPd2Si2 at 6 K. The saturation magnetization close to 7μB indicates that this metamagnetism is a field-induced valence transition from an intermediate valence state to a divalent state of the Eu ion. Based on the interconfigurational fluctuation (ICF) model, the excitation energy to convert an Eu3+ ion into Eu2+ was estimated. Temperature dependence of the metamagnetic transition field of EuPd2Si2 was also studied.",

author = "Hirofumi Wada and Akihiro Mitsuda and Masayuki Shiga and Katori, {Hiroko Aruga} and Tsuneaki Goto",

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T1 - First-Order Valence Transition of EuPd2Si2 Induced by High Magnetic Fields

AU - Wada, Hirofumi

AU - Mitsuda, Akihiro

AU - Shiga, Masayuki

AU - Katori, Hiroko Aruga

AU - Goto, Tsuneaki

PY - 1996/1/1

Y1 - 1996/1/1

N2 - In order to study the magnetic field effects on the intermediate valence of the Eu system, magnetization was measured for EuPd2Si2 and Eu(Pd0.95Pt0.05)2Si2 up to 100 T. A first-order metamagnetic transition was observed for both samples under high magnetic fields. The transition field is 93T for EuPd2Si2 at 6 K. The saturation magnetization close to 7μB indicates that this metamagnetism is a field-induced valence transition from an intermediate valence state to a divalent state of the Eu ion. Based on the interconfigurational fluctuation (ICF) model, the excitation energy to convert an Eu3+ ion into Eu2+ was estimated. Temperature dependence of the metamagnetic transition field of EuPd2Si2 was also studied.

AB - In order to study the magnetic field effects on the intermediate valence of the Eu system, magnetization was measured for EuPd2Si2 and Eu(Pd0.95Pt0.05)2Si2 up to 100 T. A first-order metamagnetic transition was observed for both samples under high magnetic fields. The transition field is 93T for EuPd2Si2 at 6 K. The saturation magnetization close to 7μB indicates that this metamagnetism is a field-induced valence transition from an intermediate valence state to a divalent state of the Eu ion. Based on the interconfigurational fluctuation (ICF) model, the excitation energy to convert an Eu3+ ion into Eu2+ was estimated. Temperature dependence of the metamagnetic transition field of EuPd2Si2 was also studied.

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First-Order Valence Transition of EuPd₂Si₂ Induced by High Magnetic Fields

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