Comparative Study on Structural, Electrical Transport and Magnetic Properties of Cr-Doped in Charge-Ordered Pr0.75Na0.25Mn1-Xcrxo3 and Nd0.75Na0.25Mn1-Ycryo3 Manganites
Keywords:Charge-Ordered, Cr-Doped, Double-Exchange Mechanism, Electrical Transport, Magnetic Properties.
Cr doping in charge-ordered Pr0.75Na0.25Mn1-xCrxO3 and Nd0.75Na0.25Mn1-yCryO3 have been synthesized using conventional solid-state method to investigate its effect on structural, electrical transport and magnetic properties. X-ray diffraction (XRD) analysis for both compounds showed that the samples were crystallized in an orthorhombic structure with Pnma group. The unit cell volume value decrease as the Cr-doped increased indicating the possibility of Mn3+ ion was replaced by Cr3+ due to the different of ionic radius. The temperature dependence of electrical resistivity showed an insulating behavior down to the lower temperature the both parent compound (x = 0 and y = 0). Successive substitution of Cr at Mn-site in Pr0.75Na0.25Mn1-xCrxO3 manganites induced the metal-insulator (MI) transition temperature around TMI~120 K and TMI~122 K for x = 0.02 and x = 0.04 samples respectively suggestively due to the enhancement of double-exchange (DE) mechanism as a result of suppress the CO state. Analysis of resistivity data of dlnÏ/dT-1 vs. T in Nd0.75Na0.25Mn1-yCryO3 manganite, showed a peak around 210 K and 160 K for y = 0 and 0.02 samples respectively while no peak was observed for y = 0.05 sample indicate the charge-ordered (CO) weakened. AC susceptibility, Ï‡â€™ measurements in Pr0.75Na0.25Mn1-xCrxO3 exhibits paramagnetic to ferromagnetic-like with curie temperature, TC increases from 132 K for x = 0.02 to 141 K for x = 0.04 with Cr content indicate the suppression of CO state meanwhile in Nd0.75Na0.25Mn1-yCryO3 showed paramagnetic to anti-ferromagnetic transition as Neel temperature TN increases from 115 K for y = 0.02 to 125 K for y = 0.05.
 Dagotto E, Hotta T & Moreo A, â€œColossal magnetoresistant materials: the key role of phase separationâ€, Physics review letter, Vol. 344, (2001), pp. 1â€“153.
 Goodenough JB, â€œElectronic structure of CMR manganites (invited)â€, Journal of Apply Physics, Vol. 81, No. 8, (1997), pp. 5330â€“5335.
 Jin S, Tiefel TH, McCormack M, Fastnacht RA, Ramesh R & Chen LH, â€œThousandfold Change in Resistivity in Magnetoresistive La-Ca-Mn-O Filmsâ€, Science, Vol. 80, No. 264, (1994), pp. 413â€“415.
 Nagaev EL, â€œColossal-magnetoresistance materials: Manganites and conventional ferromagnetic semiconductorsâ€, Physics Reports, Vol. 346, No. 6, (2001), pp. 387â€“531.
 Schultz L, Von Helmolt R, Wecker J, Holzapfel B and Samwer K, â€œGiant negative magnetoresistance in prevskite La2/3Ba1/3MnOx ferromagnetic filmsâ€, Physics review letter, Vol. 71, No. 14, (1993), pp. 2331â€“2333.
 Tokura Y & Tomioka Y, â€œColossal magnetoresistive manganitesâ€, Journal of Magnetism and Magnetic Material, Vol. 200, No. 1â€“3, (1999), pp. 1â€“23.
 Ziese M, â€œExtrinsic magnetotransport phenomena in ferromagnetic oxidesâ€, Reports on Progress in Physics, Vol. 65, No. 2, (2002), pp. 143â€“249.
 Li Y, Miao J, Sui Y, Wang X, Zhang W, Liu Y, Zhu R & Su W, â€œSynthesis, structural and transport properties of Pr0.75Na0.25Mn1-xFexO3 (0.0 â‰¤ x â‰¤ 0.3)â€, Journal of Alloys Compound, Vol. 441, No. 1â€“2, (2007), pp. 1â€“5.
 Zener C, â€œInteraction between the d-shells in the transition metalâ€, Physics review, Vol. 82, No. 3, (1950), pp. 403-405.
 HejtmÃ¡nek J, JirÃ¡k Z, Å ebek J, Strejc A & Hervieu M, â€œMagnetic phase diagram of the charge ordered manganite Pr0.8Na0.2MnO3â€, Journal of Apply Physics, Vol. 89, No. 11, (2001), pp. 7413â€“7415.
 Satoh T, Kikuchi Y, Miyano K, Pollert E, HejtmÃ¡nek J & JirÃ¡k Z, â€œIrreversible photoinduced insulator-metal transition in the Na-doped manganiteâ€, Physical Review B, Vol. 65, No. 12, (2002), pp. 125103.
 Zhang X & Li Z, â€œInfluence of Cr-doping on the magnetic and electrical transport properties of Nd0.75Na0.25MnO3â€, Journal of Rare Earths, Vol. 29, No. 3, (2011), pp. 230â€“234.
 Liu Y, Kong H & Zhu C, â€œCoexistence of charge ordering and ferromagnetism in Nd0.5Ca0.5Mn1âˆ’xCoxO3 (x â‰¤ 0.1)â€, Journal of Alloys Compound, Vol. 439, No. 1â€“2, (2007), pp. 33.
 HÃ©bert S, Maignan A, Hardy V, Martin C, Hervieu M, Raveau B, Mahendiran R & Schiffer P, â€œMagnetization and resistivity steps in the phase separated Pr0.5Ca0.5Mn1-xNixO3 manganitesâ€, European Physical Journal B, Vol. 29, No. 3, (2002), pp. 419â€“424.
 Shamsuddin S, Ibrahim ABMA & Yahya AK, â€œEffects of Cr substitution and oxygen reduction on elastic anomaly and ultrasonic velocity in charge-ordered Nd0.5Ca0.5Mn1-xCrxO3-Î´ ceramicsâ€, Ceramics International, Vol. 39, (2013), pp. 185â€“188.
 Cao S, Li W, Zhang J, Kang B, Gao T & Jing C, â€œCr-doping-induced phase separation and MR effect in the manganite Pr0.5Ca0.5Mn1-xCrxO3systemâ€, Journal of Apply Physics, Vol. 102, No. 5, (2007), pp. 0â€“6.
 Gao HP, Wu BM & Li B, â€œEffect of Cr-doping on thermal transport property in perovskite R0.7A0.3Mn1-xCrxO3â€, Physical B: Condensed Matter , Vol. 389, No. 2, (2007), pp. 252â€“257.
 Sun Y, Xu X & Zhang Y, â€œEffects of Cr doping in La0.67Ca0.33MnO3: Magnetization, resistivity, and thermopower.â€, Physical Review B: Condensed Matter and Materials Physic, Vol. 63, No. 5, (2001), pp. 1â€“5.
 Kahn ML, Hlil EK, Ellouze M, Elhalouani F, Sbissi K & Collie V, â€œFe doping effects on the structural , magnetic , and magnetocaloricâ€, Journal of Nanostructure Chemistry, Vol. 3, (2015).
 Bettaibi A, Mâ€™nassri R, Selmi A, Rahmouni H, Chniba-Boudjada N & Cheikhrouhou A, â€œEffect of chromium concentration on the structural, magnetic and electrical properties of praseodymium-calcium manganiteâ€, Journal Alloys Compounds, Vol. 650, (2015), pp. 268â€“276.
 Kumar N, Kishan H, Rao A & Awana VPS, â€œStructural, electrical, magnetic, and thermal studies of Cr-doped La0.7Ca0.3Mn1âˆ’xCrxO3 (0 â‰¤ x â‰¤ 1) manganitesâ€, Journal of Apply Physics, Vol. 107, No. 8, (2010), pp. 83905.
 Oumezzine M, PeÃ±a O, Kallel S, Kallel N, Guizouarn T, Gouttefangeas F & Oumezzine M, â€œElectrical and magnetic properties of La0.67Ba0.33Mn1-x(Me)xO3 perovskite manganites: Case of manganese substituted by trivalent (Me = Cr) and tetravalent (Me = Ti) elementsâ€, Applied Physics A: Materials Science & Processing, Vol .114, No. 13, (2014), pp. 819â€“828.
 Shamsuddin S, Ibrahim ABMA & Yahya AK, â€œEffect of Er substitution on ultrasonic anomaly in Dy0.5-xErxBa0.5CoO3 cobaltatesâ€, Ultrasonics, Vol. 53, No.6, (2013), pp. 1084â€“1088.
 Shaikh MW, Mansuri I, Dar MA & Varshney D, â€œStructural and transport properties manganitesâ€, Materials Science in Semiconductor Processing, Vol.35, (2015), pp. 10â€“21.
 Modi A & Gaur NK,â€ Structural, electrical and magnetic phase evolution of Cr substituted GdMn1-xCrxO3 (0 â‰¤ x â‰¤ 0.2) manganitesâ€, Journal of Alloys Compoun, Vol. 644, (2015), pp. 575â€“581.
 Rozilah R, Ibrahim N, Mohamed Z, Yahya AK, Khan NA & Khan MN, â€œInducement of ferromagnetic-metallic phase in intermediate-doped charge-ordered Pr0.75Na0.25MnO3 manganite by K+ substitutionâ€, Physica B: Condensed Matter, Vol. 521, No.6, (2017), pp. 281â€“294.
 Hejtm J, Mary M & Jirak Z, â€œStructure and magnetism in the Pr1-xNaxMnO3 perovskitesâ€, Journal of Magnetism and Magnetic Material, Vol. 250, (2002), pp. 275â€“287.
 Goff RJ & Attfield JP, â€œCharge ordering in half-doped manganitesâ€, Physical Review B: Condensed Matter and Materials Physics, Vol. 70, No. 14, (2004), pp. 8â€“11.
 Xiao X, Yuan S, Yin S, Chen L, Ren G, Miao J & Yu G, â€œElectrical transport and magnetic properties of La0.67Ca0.33Mn1âˆ’xCrxO3 and La0.67+xCa0.33âˆ’xMn1âˆ’xCrxO3 (0.04 â‰¤ x â‰¤ 0.08)â€, Journal of Wuhan University of Technology-Mater. Sci. Ed, Vol. 23, No.4, (2008), pp. 463â€“466.