Effects of oxygen incorporation in tensile La0.84Sr0.16MnO3-δ thin films during ex situ annealing -: art. no. 012412

被引：32

作者：

Seo, SH ^{[1
]}

Kang, HC ^{[1
]}

Jang, HW ^{[1
]}

Noh, DY ^{[1
]}

机构：

[1] Gwangju Inst Sci & Technol, Dept Mat Sci & Technol, Kwangju, South Korea

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.71.012412

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Structural changes in epitaxial La0.84Sr0.16MnO3-delta (LSMO) (001)/SrTiO3(001) thin films are studied using x-ray scattering during thermal annealing. As oxygen atoms are incorporated during annealing ex situ in air, the unit-cell volume contracts, which is attributed to the increased ratio of Mn4+ ions as indicated by enhanced saturation magnetization and ferromagnetic transition temperature. The unit-cell contraction occurs rather abruptly, suggesting that a structural phase transition happens during annealing. A 200-Angstrom-thick film remains almost fully strained even after annealing. In this case, a fourfold structural modulation is observed which accommodates the augmented lattice strain energy.

引用

页数：3

共 19 条

[11] Origin of metal-insulator transition temperature enhancement in underdoped lanthanum manganite films [J].

Murugavel, P ;

Lee, JH ;

Yoon, JG ;

Noh, TW ;

Chung, JS ;

Heu, M ;

Yoon, S .

APPLIED PHYSICS LETTERS, 2003, 82 (12) :1908-1910

[12] Colossal-magnetoresistive manganite thin films [J].

Prellier, W ;

Lecoeur, P ;

Mercey, B .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2001, 13 (48) :R915-R944

[13] Effects of annealing and strain on La1-xCaxMnO3 thin films:: A phase diagram in the ferromagnetic region [J].

Prellier, W ;

Rajeswari, M ;

Venkatesan, T ;

Greene, RL .

APPLIED PHYSICS LETTERS, 1999, 75 (10) :1446-1448

[14] LOW-TEMPERATURE MAGNETORESISTANCE AND THE MAGNETIC PHASE-DIAGRAM OF LA1-XCAXMNO3 [J].

SCHIFFER, P ;

RAMIREZ, AP ;

BAO, W ;

CHEONG, SW .

PHYSICAL REVIEW LETTERS, 1995, 75 (18) :3336-3339

[15] Strain-dependent vacuum annealing effects in La0.67Ca0.33MnO3-δ films [J].

Sun, JR ;

Yeung, CF ;

Zhao, K ;

Zhou, LZ ;

Leung, CH ;

Wong, HK ;

Shen, BG .

APPLIED PHYSICS LETTERS, 2000, 76 (09) :1164-1166

[16] INSULATOR-METAL TRANSITION AND GIANT MAGNETORESISTANCE IN LA1-XSRXMNO3 [J].

URUSHIBARA, A ;

MORITOMO, Y ;

ARIMA, T ;

ASAMITSU, A ;

KIDO, G ;

TOKURA, Y .

PHYSICAL REVIEW B, 1995, 51 (20) :14103-14109

[17] THE DEFECT CHEMISTRY OF LAMNO3+/-DELTA .4. DEFECT MODEL FOR LAMNO3+DELTA [J].

VANROOSMALEN, JAM ;

CORDFUNKE, EHP .

JOURNAL OF SOLID STATE CHEMISTRY, 1994, 110 (01) :109-112

[18] GIANT NEGATIVE MAGNETORESISTANCE IN PEROVSKITELIKE LA2/3BA1/3MNOX FERROMAGNETIC-FILMS [J].

VONHELMOLT, R ;

WECKER, J ;

HOLZAPFEL, B ;

SCHULTZ, L ;

SAMWER, K .

PHYSICAL REVIEW LETTERS, 1993, 71 (14) :2331-2333

[19] INTERACTION BETWEEN THE D-SHELLS IN THE TRANSITION METALS .2. FERROMAGNETIC COMPOUNDS OF MANGANESE WITH PEROVSKITE STRUCTURE [J].

ZENER, C .

PHYSICAL REVIEW, 1951, 82 (03) :403-405

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