Pressure-induced charge delocalization in manganites studied by means of infrared spectroscopy

被引：2
作者：
Postorino, P
Congeduti, A
Dore, P
Gorelli, FA
Nucara, A
Sacchetti, A
Ulivi, L
机构：
[1] Univ Roma La Sapienza, INFM, I-00185 Rome, Italy
[2] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
[3] Univ Florence, INFM, I-50125 Florence, Italy
[4] Univ Florence, Dipartimento Fis, I-50125 Florence, Italy
[5] European Lab Non Linear Spect, LENS, I-50125 Florence, Italy
[6] CNR, INFM, I-50127 Florence, Italy
[7] CNR, Ist Elettron Quantist, I-50127 Florence, Italy
来源：
HIGH PRESSURE RESEARCH | 2002年 / 22卷 / 01期
关键词：
manganites; high-pressure; infrared; Raman; metallization transition; Jahn-Teller;
D O I：
10.1080/08957950211374
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Infrared absorption spectra of the La(0.75)Ca(0.25)MnO(3) manganite have been collected over the spectral range 600-1100 cm(-1) along isobaric paths at P = 0,2,4 and 7 GPa in the 240-320 K temperature range. The pressure dependence of the insulator-to-metal transition temperature T(1M) has been determined from the spectra analysis and the first PT phase diagram of a manganite in the high-pressure regime is presented and discussed.
引用
收藏
页码：139 / 142
页数：4
相关论文
共 6 条
  • [1] Cheong S.-W., 1999, COLOSSAL MAGNETORESI
  • [2] Infrared study of charge delocalization induced by pressure in the La0.75Ca0.25MnO3 manganite -: art. no. 184410
    Congeduti, A
    Postorino, P
    Dore, P
    Nucara, A
    Lupi, S
    Mercone, S
    Calvani, P
    Kumar, A
    Sarma, DD
    [J]. PHYSICAL REVIEW B, 2001, 63 (18)
  • [3] Anomalous high pressure dependence of the Jahn-Teller phonon in La0.75Ca0.25MnO3
    Congeduti, A
    Postorino, P
    Caramagno, E
    Nardone, M
    Kumar, A
    Sarma, DD
    [J]. PHYSICAL REVIEW LETTERS, 2001, 86 (07) : 1251 - 1254
  • [4] Pressure effects on the magnetoresistance in doped manganese perovskites
    Hwang, HY
    Palstra, TTM
    Cheong, SW
    Batlogg, B
    [J]. PHYSICAL REVIEW B, 1995, 52 (21) : 15046 - 15049
  • [5] Pressure effects on the metal-insulator transition in magnetoresistive manganese perovskites
    Laukhin, V
    Fontcuberta, J
    GarciaMunoz, JL
    Obradors, X
    [J]. PHYSICAL REVIEW B, 1997, 56 (16): : 10009 - 10012
  • [6] High-pressure structure and electronic transport in hole-doped La3/4Ca1/4MnO3 perovskites -: art. no. 012111
    Meneghini, C
    Levy, D
    Mobilio, S
    Ortolani, M
    Nuñez-Reguero, M
    Kumar, A
    Sarma, DD
    [J]. PHYSICAL REVIEW B, 2002, 65 (01) : 1 - 4
1