Chemical pressure effects of cation size variation in layered manganites

Joonghoe Dho; Wan Seop Kim; Hong Seok Choi; Eun Ok Chi; Nam Hwi Hur

doi:10.1143/JPSJ.70.2448

Chemical pressure effects of cation size variation in layered manganites

Joonghoe Dho, Wan Seop Kim, Hong Seok Choi, Eun Ok Chi, Nam Hwi Hur

Department of Physics

Korea Research Institute of Standards and Science

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

17 Scopus citations

Abstract

We have investigated the electric and magnetic properties of the layered manganite (La_1-y,R_y)_2-2xSr_1+2xMn ₂O₇ (R = Pr, Nd, Sm. Eu, Gd; x = 0.3) with the fixed doping concentration. The average ionic radius of the La/Sr site (r_A) is varied by the replacement of the La ion with different rare earth ion. For 〈r_A〉 ∼ 1.3963 Å. we observed the metal-insulator transition accompanied by the ferromagnetic (FM) ordering near 75 K and subsequently the spin-glass-like transition near 30 K. For 〈r_A〉 ≤ 1.3895 Å. the metallic FM state disappears and instead the non-metallic spin-glass-like phase appears around 30 K. With decreasing 〈r_A〉, the FM double exchange interaction is weakened and resultantly the antiferromagnetic (AFM) superexchange interaction is developed. These magnetic and transport properties in the layered manganite system are found to be primarily dependent on the size of 〈r_A〉.

Original language	English
Pages (from-to)	2448-2453
Number of pages	6
Journal	Journal of the Physical Society of Japan
Volume	70
Issue number	8
DOIs	https://doi.org/10.1143/JPSJ.70.2448
State	Published - Aug 2001

Keywords

CMR
Electric resistivity
Ferromagnetic order
Layered manganites
Magnetization
Spin-glass behavior

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10.1143/JPSJ.70.2448

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title = "Chemical pressure effects of cation size variation in layered manganites",

abstract = "We have investigated the electric and magnetic properties of the layered manganite (La1-y,Ry)2-2xSr1+2xMn 2O7 (R = Pr, Nd, Sm. Eu, Gd; x = 0.3) with the fixed doping concentration. The average ionic radius of the La/Sr site (rA) is varied by the replacement of the La ion with different rare earth ion. For 〈rA〉 ∼ 1.3963 {\AA}. we observed the metal-insulator transition accompanied by the ferromagnetic (FM) ordering near 75 K and subsequently the spin-glass-like transition near 30 K. For 〈rA〉 ≤ 1.3895 {\AA}. the metallic FM state disappears and instead the non-metallic spin-glass-like phase appears around 30 K. With decreasing 〈rA〉, the FM double exchange interaction is weakened and resultantly the antiferromagnetic (AFM) superexchange interaction is developed. These magnetic and transport properties in the layered manganite system are found to be primarily dependent on the size of 〈rA〉.",

keywords = "CMR, Electric resistivity, Ferromagnetic order, Layered manganites, Magnetization, Spin-glass behavior",

author = "Joonghoe Dho and Kim, {Wan Seop} and Choi, {Hong Seok} and Chi, {Eun Ok} and Hur, {Nam Hwi}",

year = "2001",

month = aug,

doi = "10.1143/JPSJ.70.2448",

language = "English",

volume = "70",

pages = "2448--2453",

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T1 - Chemical pressure effects of cation size variation in layered manganites

AU - Dho, Joonghoe

AU - Kim, Wan Seop

AU - Choi, Hong Seok

AU - Chi, Eun Ok

AU - Hur, Nam Hwi

PY - 2001/8

Y1 - 2001/8

N2 - We have investigated the electric and magnetic properties of the layered manganite (La1-y,Ry)2-2xSr1+2xMn 2O7 (R = Pr, Nd, Sm. Eu, Gd; x = 0.3) with the fixed doping concentration. The average ionic radius of the La/Sr site (rA) is varied by the replacement of the La ion with different rare earth ion. For 〈rA〉 ∼ 1.3963 Å. we observed the metal-insulator transition accompanied by the ferromagnetic (FM) ordering near 75 K and subsequently the spin-glass-like transition near 30 K. For 〈rA〉 ≤ 1.3895 Å. the metallic FM state disappears and instead the non-metallic spin-glass-like phase appears around 30 K. With decreasing 〈rA〉, the FM double exchange interaction is weakened and resultantly the antiferromagnetic (AFM) superexchange interaction is developed. These magnetic and transport properties in the layered manganite system are found to be primarily dependent on the size of 〈rA〉.

AB - We have investigated the electric and magnetic properties of the layered manganite (La1-y,Ry)2-2xSr1+2xMn 2O7 (R = Pr, Nd, Sm. Eu, Gd; x = 0.3) with the fixed doping concentration. The average ionic radius of the La/Sr site (rA) is varied by the replacement of the La ion with different rare earth ion. For 〈rA〉 ∼ 1.3963 Å. we observed the metal-insulator transition accompanied by the ferromagnetic (FM) ordering near 75 K and subsequently the spin-glass-like transition near 30 K. For 〈rA〉 ≤ 1.3895 Å. the metallic FM state disappears and instead the non-metallic spin-glass-like phase appears around 30 K. With decreasing 〈rA〉, the FM double exchange interaction is weakened and resultantly the antiferromagnetic (AFM) superexchange interaction is developed. These magnetic and transport properties in the layered manganite system are found to be primarily dependent on the size of 〈rA〉.

KW - CMR

KW - Electric resistivity

KW - Ferromagnetic order

KW - Layered manganites

KW - Magnetization

KW - Spin-glass behavior

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DO - 10.1143/JPSJ.70.2448

M3 - Article

AN - SCOPUS:0035646347

SN - 0031-9015

VL - 70

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EP - 2453

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 8

ER -

Chemical pressure effects of cation size variation in layered manganites

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Keywords

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