Raman scattering in charge-ordered Pr0.63Ca0.37MnO3:: Anomalous temperature dependence of linewidth

被引：25

作者：

Gupta, R

Pai, GV

Sood, AK

Ramakrishnan, TV

Rao, CNR

机构：

[1] Indian Inst Sci, Dept Phys, Ctr Condensed Matter Theory, Bangalore 560012, Karnataka, India

[2] Jawaharlal Nehru Ctr Adv Sci Res, CSIR, Ctr Excellence Chem, Bangalore 560064, Karnataka, India

来源：

EUROPHYSICS LETTERS | 2002年 / 58卷 / 05期

关键词：

D O I：

10.1209/epl/i2002-00417-3

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the evolution of the Raman-active A(g) phonon modes in the charge-ordered manganite Pr0.63Ca0.37MnO3 as a function of temperature from 300 K to 25 K. Our studies reveal that the linewidths of the A(g)(2) and A(g)(4) phonons increase as temperature decreases. This anomalous temperature dependence of phonon lineshapes, seen for the first time in charge-ordered manganites, can be quantitatively understood in terms of a strong spin-phonon coupling involving t(2g) spins and A(g) phonons.

引用

收藏

页码：778 / 784

页数：7

相关论文

共 28 条

[1] Structural and chemical analysis of colossal magnetoresistance manganites by Raman spectrometry -: art. no. 104430 [J].

Amelitchev, VA ;

Güttler, B ;

Gorbenko, OY ;

Kaul, AR ;

Bosak, AA ;

Ganin, AY .

PHYSICAL REVIEW B, 2001, 63 (10) :1044301-1044307

[2] CONSIDERATIONS ON DOUBLE EXCHANGE [J].

ANDERSON, PW ;

HASEGAWA, H .

PHYSICAL REVIEW, 1955, 100 (02) :675-681

[3] Structural changes, clustering, and photoinduced phase segregation in Pr0.7Ca0.3MnO3 [J].

Cox, DE ;

Radaelli, PG ;

Marezio, M ;

Cheong, SW .

PHYSICAL REVIEW B, 1998, 57 (06) :3305-3314

[4] Effect of charge ordering/disordering on Raman line shape in manganites [J].

Dattagupta, S ;

Sood, AK .

PHYSICAL REVIEW B, 2002, 65 (06) :644051-6440513

[5] Jahn-Teller dynamics in charge-ordered manganites from Raman spectroscopy [J].

Dediu, V ;

Ferdeghini, C ;

Matacotta, FC ;

Nozar, P ;

Ruani, G .

PHYSICAL REVIEW LETTERS, 2000, 84 (19) :4489-4492

[6] Joint superexchange -: Jahn-Teller mechanism for layered antiferromagnetism in LaMnO3 [J].

Feinberg, D ;

Germain, P ;

Grilli, M ;

Seibold, G .

PHYSICAL REVIEW B, 1998, 57 (10) :R5583-R5586

[7] Magnetic ordering effects in the Raman spectra of La1-xMn1-xO3 [J].

Granado, E ;

García, A ;

Sanjurjo, JA ;

Rettori, C ;

Torriani, I ;

Prado, F ;

Sánchez, RD ;

Caneiro, A ;

Oseroff, SB .

PHYSICAL REVIEW B, 1999, 60 (17) :11879-11882

[8] Magnetic field resulting from nonlinear electrical transport in single crystals of charge-ordered Pr0.63Ca0.37MnO3 [J].

Guha, A ;

Khare, N ;

Raychaudhuri, AK ;

Rao, CNR .

PHYSICAL REVIEW B, 2000, 62 (18) :11941-11944

[9] Electronic Raman scattering from La0.7Sr0.3MnO3 exhibiting giant magnetoresistance [J].

Gupta, R ;

Sood, AK ;

Mahesh, R ;

Rao, CNR .

PHYSICAL REVIEW B, 1996, 54 (21) :14899-14902

[10] Raman spectroscopy of orthorhombic perovskitelike YMnO3 and LaMnO3 [J].

Iliev, MN ;

Abrashev, MV ;

Lee, HG ;

Popov, VN ;

Sun, YY ;

Thomsen, C ;

Meng, RL ;

Chu, CW .

PHYSICAL REVIEW B, 1998, 57 (05) :2872-2877