Micro-Raman study and phase transitions of Nd0.5Ca0.5MnO3

被引：7

作者：

Jandl, S ^{[1
]}

Mukhin, AA

Ivanov, VY

Balbashov, AM

机构：

[1] Univ Sherbrooke, Dept Phys, Sherbrooke, PQ J1K 2R1, Canada

[2] Russian Acad Sci, Inst Gen Phys, Moscow 119991, Russia

[3] Moscow Power Engn Inst, Moscow 105835, Russia

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2006年 / 18卷 / 05期

关键词：

D O I：

10.1088/0953-8984/18/5/019

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A micro-Raman study of high quality Nd0.5Ca0.5MnO3 single crystals is presented, with temperature variation. Twelve A(g) and eight B-2g Raman active modes (simplified symmetry: Pmma space group) have been observed in resonance conditions and compared to the parent and charge ordered compound phonons. The detected Nd0.5Ca0.5MnO3 phonons retrace the magnetic and structural temperature evolutions in the paramagnetic, charge ordered (T-co similar to 250 K) and antiferromagnetic orbital ordered (T-N similar to 160 K) regimes. In particular, at T < T-N, phase separation and also rotational and coherent Jahn-Teller MnO6 distortions prevail.

引用

页码：1667 / 1676

页数：10

共 44 条

[1] Comparative study of optical phonons in the rhombohedrally distorted perovskites LaAlO3 and LaMnO3 [J].

Abrashev, MV ;

Litvinchuk, AP ;

Iliev, MN ;

Meng, RL ;

Popov, VN ;

Ivanov, VG ;

Chakalov, RA ;

Thomsen, C .

PHYSICAL REVIEW B, 1999, 59 (06) :4146-4153

[2] Raman spectroscopy of CaMnO3:: Mode assignment and relationship between Raman line intensities and structural distortions -: art. no. 184301 [J].

Abrashev, MV ;

Bäckström, J ;

Börjesson, L ;

Popov, VN ;

Chakalov, RA ;

Kolev, N ;

Meng, RL ;

Iliev, MN .

PHYSICAL REVIEW B, 2002, 65 (18) :1-9

[3] Raman spectroscopy of the charge- and orbital-ordered state in La0.5Ca0.5MnO3 -: art. no. 144429 [J].

Abrashev, MV ;

Bäckström, J ;

Börjesson, L ;

Pissas, M ;

Kolev, N ;

Iliev, MN .

PHYSICAL REVIEW B, 2001, 64 (14) :1444291-1444298

[4] Self-trapped exciton and Franck-Condon spectra predicted in LaMnO3 [J].

Allen, PB ;

Perebeinos, V .

PHYSICAL REVIEW LETTERS, 1999, 83 (23) :4828-4831

[5] First order nucleation of charge ordered domains in La0.5Ca0.5MnO3 detected by 139La and 55Mn NMR [J].

Allodi, G ;

De Renzi, R ;

Licci, F ;

Pieper, MW .

PHYSICAL REVIEW LETTERS, 1998, 81 (21) :4736-4739

[6] An infrared spectroscopic study of the insulator-metal transition and charge-ordering in rare earth manganates, Ln1-xAxMnO3 (Ln = rare earth, A = Ca, Sr, Pb) [J].

Arulraj, A ;

Rao, CNR .

JOURNAL OF SOLID STATE CHEMISTRY, 1999, 145 (02) :557-563

[7] Charge ordering in the rare-earth manganates:: the origin of the extraordinary sensitivity to the average radius of the A-site cations, ⟨rA⟩ [J].

Arulraj, A ;

Santhosh, PN ;

Gopalan, RS ;

Guha, A ;

Raychaudhuri, AK ;

Kumar, N ;

Rao, CNR .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1998, 10 (38) :8497-8504

[8] Resonant micro-Raman study of Nd0.5Sr0.5MnO3 [J].

Asselin, S ;

Jandl, S ;

Fournier, P ;

Mukhin, AA ;

Ivanov, VY ;

Balbashov, AM .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2005, 17 (34) :5247-5254

[9] Growth and giant magnetoresistance effect in La-Ca-Mn-O and La-Sr-Mn-O single crystals [J].

Balbashov, AM ;

Karabashev, SG ;

Mukovskiy, YM ;

Zverkov, SA .

JOURNAL OF CRYSTAL GROWTH, 1996, 167 (1-2) :365-368

[10] The manganite Nd0.5Sr0.5MnO3: A rare distortion of the perovskite [J].

Caignaert, V ;

Millange, F ;

Hervieu, M ;

Suard, E ;

Raveau, B .

SOLID STATE COMMUNICATIONS, 1996, 99 (03) :173-177

← 1 2 3 4 5 →