Size effect on the electron-spin resonance of Pr0.7Sr0.3-xCaxMnO3

被引：23

作者：

Gundakaram, R ^{[1
]}

Lin, JG ^{[1
]}

Huang, CY ^{[1
]}

机构：

[1] Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 10764, Taiwan

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.58.12247

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electron-spin-resonance (ESR) measurements have been performed on samples of the system Pr-0.7(Sr0.3 - xCax)MnO3. Substitution of Ca in the Sr site changes the effective ionic radius of the A site, but the average Mn valence remains unchanged. The variation of the resonance linewidth, magnetization, and activation energy as functions of temperature and Ca concentration has been studied. The linewidth increases with an increase in the Ca content, which has been explained on the basis of the change in the tolerance factor. For x<0.1, the ESR line intensity varies exponentially with temperature with an activation energy dependent on x. However, for samples with 0.1 less than or equal to x less than or equal to 0.3, there is a change in the activation energy in the temperature range of the present study (110-550 K). [S0163-1829(98)05842-1].

引用

页码：12247 / 12251

页数：5

共 23 条

[1] Are ''single phase'' manganite samples truly homogeneous? A magnetic resonance study [J].

Dominguez, M ;

Lofland, SE ;

Bhagat, SM ;

Raychaudhuri, AK ;

Ju, HL ;

Venkatesan, T ;

Greene, RL .

SOLID STATE COMMUNICATIONS, 1996, 97 (03) :193-196

[2] Colossal magnetoresistance of ferromagnetic manganites: Structural tuning and mechanisms [J].

Fontcuberta, J ;

Martinez, B ;

Seffar, A ;

Pinol, S ;

GarciaMunoz, JL ;

Obradors, X .

PHYSICAL REVIEW LETTERS, 1996, 76 (07) :1122-1125

[3] LATTICE EFFECTS ON THE MAGNETORESISTANCE IN DOPED LAMNO3 [J].

HWANG, HY ;

CHEONG, SW ;

RADAELLI, PG ;

MAREZIO, M ;

BATLOGG, B .

PHYSICAL REVIEW LETTERS, 1995, 75 (05) :914-917

[4] FERROMAGNETIC COMPOUNDS OF MANGANESE WITH PEROVSKITE STRUCTURE [J].

JONKER, GH ;

VANSANTEN, JH .

PHYSICA, 1950, 16 (03) :337-349

[5] Giant magnetoresistance in magnetic layered and granular materials [J].

Levy, PM .

SOLID STATE PHYSICS - ADVANCES IN RESEARCH AND APPLICATIONS, VOL 47, 1994, 47 :367-462

[6] Ferromagnetic resonance and magnetic homogeneity in a giant-magnetoresistance material La2/3Ba1/3MnO3 [J].

Lofland, SE ;

Bhagat, SM ;

Ju, HL ;

Xiong, GC ;

Venkatesan, T ;

Greene, RL .

PHYSICAL REVIEW B, 1995, 52 (21) :15058-15061

[7] Resistivity, giant magnetoresistance and thermopower in La0.7Sr0.3MnO3 showing a large difference in temperatures corresponding to the ferromagnetic transition and the insulator-metal transition [J].

Mahendiran, R ;

Mahesh, R ;

Raychaudhuri, AK ;

Rao, CNR .

SOLID STATE COMMUNICATIONS, 1996, 99 (03) :149-152

[8] EFFECT OF THE INTERNAL-PRESSURE DUE TO THE A-SITE CATIONS ON THE GIANT MAGNETORESISTANCE AND RELATED PROPERTIES OF DOPED RARE-EARTH MANGANATES, LN(1-X)A(X)MNO(3) (LN=LA,ND,GD,Y, A=CA,SR,BA,PB) [J].

MAHESH, R ;

MAHENDIRAN, R ;

RAYCHAUDHURI, AK ;

RAO, CNR .

JOURNAL OF SOLID STATE CHEMISTRY, 1995, 120 (01) :204-207

[9] DOUBLE EXCHANGE ALONE DOES NOT EXPLAIN THE RESISTIVITY OF LA1-XSRXMNO3 [J].

MILLIS, AJ ;

LITTLEWOOD, PB ;

SHRAIMAN, BI .

PHYSICAL REVIEW LETTERS, 1995, 74 (25) :5144-5147

[10] Evidence for collective spin dynamics above the ordering temperature in La1-xCaxMnO3+delta [J].

Oseroff, SB ;

Torikachvili, M ;

Singley, J ;

Ali, S ;

Cheong, SW ;

Schultz, S .

PHYSICAL REVIEW B, 1996, 53 (10) :6521-6525

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