Antiferromagnetic resonance in charge ordering state of Pr 0.5Ca0.5MnO3-δ single crystal

S. Kawamata; S. Noguchi; K. Okuda; H. Nojiri; M. Motokawa

doi:10.1016/S0304-8853(00)01290-7

Antiferromagnetic resonance in charge ordering state of Pr _0.5Ca_0.5MnO_3-δ single crystal

S. Kawamata, S. Noguchi, K. Okuda, H. Nojiri, M. Motokawa

Institute for Materials Research (IMR) (institute affiliation only)

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

8 Citations (Scopus)

Abstract

An antiferromagnetic resonance (AFMR) is observed in the charge ordered antiferromagnetic phase of Pr_0.5Ca_0.5MnO _3-δ single crystal for the first time. Above the Néel temperature, T_N = 173 K, a paramagnetic resonance with g = 2.0 is observed, There is no significant change of the resonance spectra at the charge ordering transition temperature, T_co = 242K, Below T_N, a branch of AFMR is found. Since the resonance field of this mode increases linearly as the frequency is decreased, this branch is assigned, as the spin-flop mode. Below 60K, the critical fields, B_c, evaluated as the extrapolation of this mode to zero frequency agree well with the insulator-metal transition fields, B_CO, at which the melting of the charge-ordering phase occurs. Present results indicate that the temperature dependence of B _co is affected by the temperature dependence of Bc.

Original language	English
Pages (from-to)	854-856
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	226-230
Issue number	PART I
DOIs	https://doi.org/10.1016/S0304-8853(00)01290-7
Publication status	Published - 2001 Jan 1

Keywords

Charge ordering
Dependent
Perovskite structure
Phase transitions-field
Resonance-antiferromagnetic

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Antiferromagnetic resonance in charge ordering state of Pr 0.5Ca0.5MnO3-δ single crystal",

abstract = "An antiferromagnetic resonance (AFMR) is observed in the charge ordered antiferromagnetic phase of Pr0.5Ca0.5MnO 3-δ single crystal for the first time. Above the N{\'e}el temperature, TN = 173 K, a paramagnetic resonance with g = 2.0 is observed, There is no significant change of the resonance spectra at the charge ordering transition temperature, Tco = 242K, Below TN, a branch of AFMR is found. Since the resonance field of this mode increases linearly as the frequency is decreased, this branch is assigned, as the spin-flop mode. Below 60K, the critical fields, Bc, evaluated as the extrapolation of this mode to zero frequency agree well with the insulator-metal transition fields, BCO, at which the melting of the charge-ordering phase occurs. Present results indicate that the temperature dependence of B co is affected by the temperature dependence of Bc.",

keywords = "Charge ordering, Dependent, Perovskite structure, Phase transitions-field, Resonance-antiferromagnetic",

author = "S. Kawamata and S. Noguchi and K. Okuda and H. Nojiri and M. Motokawa",

year = "2001",

month = jan,

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doi = "10.1016/S0304-8853(00)01290-7",

language = "English",

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journal = "Journal of Magnetism and Magnetic Materials",

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TY - JOUR

T1 - Antiferromagnetic resonance in charge ordering state of Pr 0.5Ca0.5MnO3-δ single crystal

AU - Kawamata, S.

AU - Noguchi, S.

AU - Okuda, K.

AU - Nojiri, H.

AU - Motokawa, M.

PY - 2001/1/1

Y1 - 2001/1/1

N2 - An antiferromagnetic resonance (AFMR) is observed in the charge ordered antiferromagnetic phase of Pr0.5Ca0.5MnO 3-δ single crystal for the first time. Above the Néel temperature, TN = 173 K, a paramagnetic resonance with g = 2.0 is observed, There is no significant change of the resonance spectra at the charge ordering transition temperature, Tco = 242K, Below TN, a branch of AFMR is found. Since the resonance field of this mode increases linearly as the frequency is decreased, this branch is assigned, as the spin-flop mode. Below 60K, the critical fields, Bc, evaluated as the extrapolation of this mode to zero frequency agree well with the insulator-metal transition fields, BCO, at which the melting of the charge-ordering phase occurs. Present results indicate that the temperature dependence of B co is affected by the temperature dependence of Bc.

AB - An antiferromagnetic resonance (AFMR) is observed in the charge ordered antiferromagnetic phase of Pr0.5Ca0.5MnO 3-δ single crystal for the first time. Above the Néel temperature, TN = 173 K, a paramagnetic resonance with g = 2.0 is observed, There is no significant change of the resonance spectra at the charge ordering transition temperature, Tco = 242K, Below TN, a branch of AFMR is found. Since the resonance field of this mode increases linearly as the frequency is decreased, this branch is assigned, as the spin-flop mode. Below 60K, the critical fields, Bc, evaluated as the extrapolation of this mode to zero frequency agree well with the insulator-metal transition fields, BCO, at which the melting of the charge-ordering phase occurs. Present results indicate that the temperature dependence of B co is affected by the temperature dependence of Bc.

KW - Charge ordering

KW - Dependent

KW - Perovskite structure

KW - Phase transitions-field

KW - Resonance-antiferromagnetic

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VL - 226-230

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JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

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