碱土金属元素 meaning in English

alkali earth metal
earthy element

In recent years , the colossal magneto - resistance effect in rare - earth manganite perovskites of the type lni . xaxmno3 ( where ln is rear - earth irons la2 + , nd2 + , p2 + ; a is alkaline earth iron ca2 + , sr2 + , ba2 + ) has attract considerable attention in scientific studies due to its potential application . however , the poor temperature dependence of mr and the low - temperature mr effect and the ideal mr only in high field severely limit their practical utility . in this work , we prepared manganite perovskite lai - xsrxmno3 and soft - magnetic ferrite materials fe2o3 and ( ni , zn ) fe2o4 by using sol - gel method separately
近些年来，人们发现在钙钛矿锰氧化物ln _ ( 1 - x ) axmno _ 3 ( ln为la ， nd ， pr等稀土金属元素； a为ca ， sr ， ba等碱土金属元素)中具有磁电阻( magnetoresistance )效应，由于它在磁记录，磁传感器方面具有广泛的应用前景，同时也向传统的磁记录材料提出了挑战，因而引起了物理学界的广泛关注。